Consulta: subjectFacets:"Seroprevalence"
Registros recuperados: 38
Data/hora: 11/06/2024 12:32:36

Seroprevalencia y factores de riesgo asociados a brucelosis (Brucella abortus) en ganadería bovina de la zona sur de Veracruz, México.
Provedor de dados: 32
Autores: Aguilar Ballesteros, Gerardo.
El propósito del estudio fue estimar la seroprevalencia y factores de riesgo asociados a brucelosis bovina en la zona sur de Veracruz, México. Mediante un estudio epidemiológico de tipo transversal a través de un muestreo serológico de ganado bovino. La seroprevalencia se evaluó aplicando las pruebas de Tarjeta o Rosa de Bengala y Rivanol. Se realizó una encuesta por animal y por hato, generando dos bases de datos de los 12 municipios evaluados. Los resultados obtenidos mediante las pruebas de Tarjeta y Rivanol indican una seroprevalencia general del 0.187% (2/1066)  para la zona sur de Veracruz, de igual manera, se estimó un 2.4% (2/85) de hatos con ganado positivo a brucelosis. No fue posible el cálculo de factores de riesgo en este estudio a causa de la...
Palavras-chave: Brucelosis; Bovinos; Seroprevalencia; Factores de riesgo; Abortos; Salud animal; Brucellosis; Cattle; Seroprevalence; Risk factors; Abortions; Animal health; Agrosistemas Tropicales; Maestría.
Ano: 2010
URL: http://hdl.handle.net/10521/547

Cytomegalovirus and Toxoplasma gondii seroprevalence in a Brazilian liver transplant waiting
Provedor de dados: 80
Autores: Almeida,R. A. M. B.; Silva,G. F.; Llanos,J. C.; Winckler,C. C.; Gomes,M. R. B.; Biagioni,D. S.; Paula,R. C. C.; Meira,D. A.; Bakonyi,A.
Cytomegalovirus (CMV) disease is a major cause of morbidity and mortality in solid organ transplantation. Disseminated toxoplasmosis after liver transplantation is a rare but fatal event. Serologic screening of the donor and the recipient is essential to prophylactic management, early diagnosis and therapeutic strategies to minimize the consequences of these infections. The aim of the present study was to determine the seroprevalence of CMV and Toxoplasma gondii (TG) in a Brazilian liver transplant waiting list (LTWL). Serological data were collected from 44 candidates on the LTWL between May 2003 and November 2004. Serological investigation of antibodies IgM and IgG against CMV (anti-CMV) and TG (anti-T. gondii) was performed using fluorometry commercial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytomegalovirus; Liver transplantation; Toxoplasmosis; Toxoplasma gondii; Seroprevalence; Waiting list.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992007000400016

American visceral leishmaniasis: disease control strategies in dracen microregion in alta paulista, SP, Brazil
Provedor de dados: 80
Autores: D'Andrea,LAZ; Camargo-Neves,VLF; Sampaio,SMP; Kronka,SN; Sartor,IF.
Despite measures adopted to control American visceral leishmaniasis (AVL), the disease is spreading in a fast and worrying way throughout western São Paulo state. The aim of this work was to study the variables involved in the disease cycle as well as the effectiveness of controlling measures. The study was carried out in the microregion of Dracena, which is composed of twelve cities and belongs to Alta Paulista, a region of western São Paulo. The necessary data were provided by the Superintendence for Endemic Disease Control and Adolfo Lutz Institute, Regional Laboratory of Presidente Prudente. From August 2005 to January 2008, the following factors were observed: detection of phlebotomine sandflies in the cities and periods in which dogs or humans were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Visceral leishmaniasis; Seroprevalence; Control strategies; São Paulo; Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000200012

Seroepidemiological analysis of toxoplasmosis in college students
Provedor de dados: 80
Autores: Rodrigues,Jaqueline Polizeli; Frei,Fernando; Navarro,Italmar Teodorico; Silva,Luciana Pereira; Marcelino,Monica Yonashiro; Andrade-Junior,Heitor Franco de; Faria,Carolina Arruda de; Santos,Marislene; Ribeiro-Paes,João Tadeu.
Background Toxoplasmosis is a zoonosis caused by an obligate intracellular parasite, Toxoplasma gondii, which affects warm-blooded animals including humans. Its prevalence rates usually vary in different regions of the planet. Methods In this study, an analysis of the seroprevalence of toxoplasmosis among Brazilian students was proposed by means of IgG specific antibodies detection. The presence of anti-Toxoplasma gondiiantibodies by indirect fluorescent antibody test (IFAT) was also evaluated in order to compare it with enzyme-linked immunosorbent assay (ELISA) and to assess the use of 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) and o-phenylenediamine dihydrochloride chromogens. Results The IFAT method showed a seroprevalence of 22.3%. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxoplasma gondii; Toxoplasmosis; Enzyme-linked immunosorbent assay; Indirect fluorescent antibody test; Seroprevalence; Epidemiology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100311

Seroprevalences of Toxoplasma gondii and Neospora caninum in Pet Rabbits in Japan
Provedor de dados: 19
Autores: SALMAN, Doaa; OOHASHI, Eiji; MOHAMED, Adel Elsayed Ahmed; ABD EL-MOTTELIB, Abd El-Raheem; OKADA, Tadashi; IGARASHI, Makoto; 五十嵐, 慎.
The potential contamination of Toxoplasma gondii and Neospora caninum oocysts in the human environment is a concern from the public health viewpoint. However, estimation of their seroprevalences in humans cannot be performed in a manner that distinguishes between oocysts and tissue cysts as a source of infection. Rabbits are considered popular pet animals in Japan that can acquire natural infections by the aforementioned parasites only through the ingestion of oocysts. Therefore, this study was conducted to estimate the seroprevalences of T. gondii and N. caninum in pet rabbits in Japan as an indicator of the possible oocyst contamination in the environment surrounding human beings. Serum samples of 337 rabbits were examined by different serological...
Palavras-chave: Neospora caninum; Rabbit; Seroprevalence; Toxoplasma gondii.
Ano: 2014
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3936

Seroprevalence and epidemiology of Toxoplasma gondii in farm animals in different regions of Egypt
Provedor de dados: 19
Autores: Fereig, Ragab M.; Mahmoud, Hassan Y.A.H.; Mohamed, Samy G.A.; AbouLaila, Mahmoud Rezk; Abdel-Wahab, Azza; Osman, Salama Ahmed; Zidan, Sherif Abdallah; El-Khodary, Sabry A.; Mohamed, Adel Elsayed Ahmed; Nishikawa, Yoshifumi.
Toxoplasmosis is a cosmopolitan protozoan disease that has been recorded in a wide range of vertebrate hosts, including humans. In response to the paucity of available data, this study was undertaken to comprehensively establish the seroprevalence of Toxoplasma gondii among various farm animals in different localities of Egypt. The latex agglutination test and TgGRA7-based enzyme-linked immunosorbent assay were used to screen the investigated animals for anti-T. gondii IgG antibodies. When only samples with simultaneously positive results for both the latex agglutination test and the TgGRA7-based ELISA were considered positive, 174 (26.7%) of 652 serum samples from different animals were seropositive. The prevalence of antibodies according to species was:...
Palavras-chave: Egypt; Seroprevalence; Toxoplasma gondii; Toxoplasmosis.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4545

H9N2 avian influenza virus antibody titers in human population in fars province, Iran
Provedor de dados: 89
Autores: Hadipour,MM.
Among the avian influenza A virus subtypes, H5N1 and H9N2 viruses have the potential to cause an influenza pandemic because they are widely prevalent in avian species in Asia and have demonstrated the ability to infect humans. This study was carried out to determined the seroprevalence of H9N2 avian influenza virus in different human populations in Fars province, which is situated in the south of Iran. Antibodies against H9N2 avian influenza virus were measured using hemagglutination-inhibition (HI) test in sera from 300 individuals in five different population in Fars province, including poultry-farm workers, slaughter-house workers, veterinarians, patients with clinical signs of respiratory disease, and clinically normal individuals, who were not or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian influenza virus; Fars province; Human; H9N2; Iran; Seroprevalence.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300004

Seroprevalence survey of H9N2 avian influenza virus in backyard chickens around the Caspian Sea in Iran
Provedor de dados: 89
Autores: Hadipour,MM.
Since 1998, an epidemic of avian influenza occurred in the Iranian poultry industry. The identified agent presented low pathogenicity, and was subtyped as an H9N2 avian influenza virus. Backyard chickens can play an important role in the epidemiology of H9N2 avian influenza virus infection. Close contact of backyard chickens with migratory birds, especially with aquatic birds, as well as neighboring poultry farms, may pose the risk of transmitting avian influenza virus, but little is known about the disease status of backyard poultry. A H9N2 avian influenza virus seroprevalence survey was carried out in 700 backyard chickens from villages around the Caspian Sea, Northern Iran, using the hemagglutination-inhibition (HI) test. The studied backyard chickens...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian Influenza virus; Backyard chickens; Caspian Sea; H9N2; Seroprevalence; Iran; HI.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100008

Seroprevalence of Zika virus among blood donors before the epidemic in Barranquilla, Colombia, 2015-2016.
Provedor de dados: 42
Autores: BAYONA-PACHECO,BRAYAN; ACOSTA-REYES,JORGE; NAVARRO,EDGAR; SAN-JUAN,HOMERO; BULA,JOHAN; BAQUERO,HERNANDO.
Abstract: The first cases of Zika virus infection in Colombia were reported and confirmed in October 2015. The objective of the study was estimate the seroprevalence of ZIKV infection during the pre-epidemic phase in Barranquilla, Colombia, and demonstrate the presence of virus before the Colombian Ministry of Health confirmed the first case. We conducted a descriptive study of the seroprevalence of Zika virus in 390 samples obtained from a blood bank located in Barranquilla, Colombia - a city endemic for dengue, and with a recent history of a Chikungunya disease epidemic. The serum pools were tested using Euroimmun ZIKV ELISA kit. Seroprevalence of Zika virus IgG were: May 2015: 0%, June and July 2015: 2.62% (95% CI = 0.28-12.13) and August 2015: 5.35%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zika virus; Seroprevalence; Pre-epidemic dates; Pregnant women.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500618

Intra-uterine exposure of horses to Sarcocystis spp. antigens
Provedor de dados: 45
Autores: Antonello,A.M.; Cadore,G.C.; Pivoto,F.L.; Camillo,G.; Braunig,P.; Sangioni,L.A.; Pompermayer,E.; Gondim,L.F.P.; Vogel,F.S.F.
The aim of this study was to examine the intra-uterine exposure to Sarcocystis spp. antigens, determining the number of foals with detectable concentrations of antibodies against these agents in the serum, before colostrum ingestion and collect data about exposure of horses to the parasite. Serum samples were collected from 195 thoroughbred mares and their newborns in two farms from southern Brazil. Parasite specific antibody responses to Sarcocystis antigens were detected using the indirect immunofluorescent antibody test (IFAT) and immunoblot analysis. In 84.1% (159/189) of the pregnant mares and in 7.4% (14/189) of foals we detected antibodies anti-Sarcocystis spp. by IFAT. All samples seropositive from foals were also positive in their respective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Equine protozoal mieloencephalitis; Transplacental infection; Seroprevalence; Indirect fluorescent antibody test; Immunoblot.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000200271

Seroepidemiology of Neospora caninum among goats (Capra hircus) in the state of Paraíba, northeastern Brazil
Provedor de dados: 45
Autores: Braz,B.M.A.; Valente,J.D.M.; Villalobos,E.M.C.; Lara,M.C.C.S.H.; Machado,C.A.L.; Barbosa,I.C.; Melo,V.S.P.; Stipp,D.T.; Barros-Filho,I.R.; Biondo,A.W.; Vieira,T.S.W.J.; Vieira,R.F.C.
ABSTRACT Although goat dairy farms in Brazil may have a higher risk of infection by Neospora caninum than beef farms, risk factor evaluation on a representative population remains to be fully established in Brazil. Accordingly, this study aimed to establish the occurrence of anti-N. caninum antibodies and factors associated with exposure in 406 blood samples from five dairy and three beef goat farms in the state of Paraíba, northeastern Brazil. Anti-N. caninum antibodies were detected by indirect immunofluorescence assay (IFA), with samples considered positive when reacting with dilution ≥ 1:50. A total of 106/406 goats (26.11%; 95% CI: 21.96-30.72%) were seroreactive comprising 2/61 (3.28%), 10/45 (22.22%), 13/50 (26.00%), 17/51 (33.33%) to 29/46 (63.04%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: IFA; Neosporosis; Seroprevalence; Small ruminants.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100147

Seroprevalence of toxoplasma gondii infection in goats in the five northwestern provinces of China
Provedor de dados: 45
Autores: Wang,Y.; Qin,X.; Chen,Y.; Xing,J.; Gao,J.; Qiu,D.
RESUMO O objetivo do presente estudo foi investigar a soroprevalência de infecção com Toxoplasma gondii (T. gondii) em cabras em cinco províncias do noroeste da China. Soroprevalência foi determinado usando o kit de teste de ensaio de imunoabsorção enzimática (ELISA). A soroprevalência geral foi 21.23% (197/928). Análise estatística revlou que diferenças significativas foram observadas em fêmeas (P= 0.048, OR= 0.567, 95% CI= 0.309 a 1.041) e nos grupos ≥ 2 (P= 0.002, OR= 0.330, 95% CI= 0.224 a 0.488). Nenhuma diferença estatisticamente significativa foi observada entre diferentes províncias. Nossos resultados indicam que a infecção com T. gondii, que pode ter implicações importantes sobre a saúde pública, teve diferenças significativas em sexo e idade, mas...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Toxoplasma gondii; Seroprevalence; Goat; Five northwestern provinces.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352020000100277

Serological survey of antibodies to Toxoplasma gondii in food animals from São Paulo state, Brazil
Provedor de dados: 62
Autores: Meireles,Luciana Regina; Galisteo Jr.,Andrés Jimenez; Andrade Jr.,Heitor Franco de.
Toxoplasmosis is one of the most prevalent parasitic infections of man and livestock, and its transmission has usually been attributed to ingestion of undercooked or raw meat from infected livestock, with the infection rate in those animals being an important risk predictor of human disease, high in Brazil and São Paulo State. Looking for this public health problem, we tested serum samples from cattle, goat, sheep and chicken from the State of São Paulo, Brazil, for IgG antibodies to Toxoplasma gondii by enzyme-linked immunosorbent assay (ELISA). Antibodies to Toxoplasma gondii were found in 31.00% (62/200) of sheep, 17.00% (34/200) of goat and 11.00% (22/200) of cattle, without positive sample in chicken. Despite differences in feeding habits of each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxoplasma gondii; Food animals; Seroprevalence; ELISA.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962003000400005

Low seroprevalence of Zika virus in Cameroonian blood donors
Provedor de dados: 55
Autores: Gake,Bouba; Vernet,Marie A.; Leparc-Goffart,Isabelle; Drexler,Jan Felix; Gould,Ernest A.; Gallian,Pierre; Lamballerie,Xavier de.
Abstract A Zika virus seroepidemiology study was performed in 1084 blood donors collected from August to October 2015 in six sites of Cameroon representing a large panel of eco-environments. Samples were tested using an anti-NS1 IgG ELISA detection kit and positives were further confirmed by seroneutralization. The observed global seroprevalence was low (around 5%, peaking at 10% and 7.7% in Douala and Bertoua, respectively) with risk factors associated with seropositivity pointing to the existence of a local (peri-)sylvatic cycle of transmission. These results call attention to the potential introduction and subsequent spread in African urban areas of Asian genotype Zika virus currently circulating in the Americas and adapted to transmission by...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Zika virus; Seroprevalence; Africa.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000400481

Prevalence of toxoplasmosis, HIV, syphilis and rubella in a population of puerperal women using Whatman 903® filter paper
Provedor de dados: 55
Autores: Madi,José Mauro; Souza,Ricardo da Silva de; Araújo,Breno Fauth de; Oliveira Filho,Petrônio Fagundes de; Rombaldi,Renato Luís; Mitchell,Charles; Lorencetti,Jucemara; Marcon,Nathalia Oliva.
OBJECTIVES: to determine the seroprevalence rate of toxoplasmosis, HIV, syphilis and rubella in a population of puerperal women. METHODS: a prospective, cross-sectional study was performed from February 2007 to April 2008 at Hospital Geral, Universidade de Caxias do Sul in a population of 1,510 puerperal women. Women that gave birth to live born or stillborn infants were included in the study; maternal and perinatal variables were analyzed. Descriptive statistics and Pearson's chi-square with occasional Fisher's correction were used for comparisons. Alpha was set in 5%. RESULTS: a total of 148 cases of congenital infection (9.8%) were identified: 66 cases of syphilis (4.4%), 40 cases of HIV (2.7%), 27 cases of toxoplasmosis (1.8%) and 15 cases of rubella...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Perinatal infections; Congenital infections; Clinical diagnosis; Seroprevalence.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000100006

High prevalence of hepatitis C infection in a Brazilian prison: identification of risk factors for infection
Provedor de dados: 55
Autores: Guimarães,Thaís; Granato,Celso F. H.; Varella,Drauzio; Ferraz,Maria Lúcia G.; Castelo,Adauto; Kallás,Esper Georges.
Hepatitis C virus (HCV) causes infectious hepatitis worldwide. It is transmitted mainly by blood products and sharing of intravenous paraphernalia during illicit drug use. High prevalence rates have been described among specific groups considered to be at higher risk for HCV infection, including prison inmates. The objectives of this study were: to determine the HCV seroprevalence among inmates of Casa de Detenção de São Paulo; to identify risk factors for HCV infection; and to compare the seroprevalence of HCV to other blood borne or sexually transmitted diseases. From December, 1993, to January, 1994, a total of 779 inmates were interviewed to collect information on sociodemographic status, sexual behavior, and past experience with illicit drugs. Blood...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HCV; Seroprevalence; Prison; Risk factor.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000300002

Hepatitis E virus seroprevalence among schistosomiasis patients in Northeastern Brazil
Provedor de dados: 55
Autores: Passos-Castilho,Ana Maria; de Sena,Anne; Domingues,Ana Lucia Coutinho; Lopes-Neto,Edmundo Pessoa; Medeiros,Tibério Batista; Granato,Celso Francisco Hernandez; Ferraz,Maria Lúcia.
Abstract  Background Hepatitis E virus (HEV) can cause chronic infection with rapid progression to liver cirrhosis in immunocompromised patients. HEV seroprevalence in patients with Schistosoma mansoni in Brazil is unknown. We evaluated the prevalence of past or present HEV infection in schistosomiasis patients in Recife, Pernambuco, Brazil. A total of 80 patients with Schistosoma mansoni were consecutively enrolled in a cross-sectional study. Serum samples were tested for the presence of anti-HEV IgG antibodies by enzyme immunoassay (Wantai anti-HEV IgG, Beijing, China) and for the presence of HEV RNA using real time reverse transcriptase-polymerase chain reaction with primers targeting the HEV ORF2 and ORF3. Clinical and laboratory tests as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Epidemiology; Hepatitis E virus; Schistosomiasis; Seroprevalence.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000300007

Seroprevalence of hepatitis A antibodies in a group of normal and Down Syndrome children in Porto Alegre, Southern Brazil
Provedor de dados: 55
Autores: Ferreira,Cristina Targa; Leite,Júlio César; Taniguchi,Adriano Nori R.; Vieira,Sandra Maria G.; Pereira-Lima,Jorge; Silveira,Themis Reverbel da.
The high incidence of Hepatitis A and B in institutionalized patients with Down Syndrome (DS) is not fully understood. Under poor hygienic conditions, immunological alterations might predispose individuals to these infections. Sixty three DS children between 1 and 12 years old living at home with their families were examined for anti-HAV and compared to age-matched controls (64 healthy children). This cross-sectional study was carried out from May, 1999, to April, 2000, at the Hospital de Clínicas of Porto Alegre, southern Brazil. Groups were compared in terms of age, sex, skin color, and family income (&gt; R$ 500 and &lt; R$ 500/ month) by the chi-square test, with Yates' correction and for the prevalence of anti-HAV (Fisher's exact test). In the DS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Down syndrome; Hepatitis A; Seroprevalence.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000500003

Seroprevalence of hepatitis E virus in chronic hepatitis C in Brazil
Provedor de dados: 55
Autores: Bricks,Guilherme; Senise,Jorge Figueiredo; Pott Junior,Henrique; Grandi,Giuliano; Passarini,Amanda; Caldeira,Débora Bellini; Carnaúba Junior,Dimas; Moraes,Hamilton Antonio Bonilha de; Granato,Celso Franscisco Hernandes; Castelo,Adauto.
ABSTRACT  Background and aims: Hepatitis E virus infection in patients with underlying chronic liver disease is associated with liver decompensation and increased lethality. The seroprevalence of hepatitis E virus in patients with chronic hepatitis C in Brazil is unknown. This study aims to estimate the seroprevalence of hepatitis E virus in patients with chronic hepatitis C and to describe associated risk factors.  Methods: A total of 618 patients chronically infected with hepatitis C virus from three reference centers of São Paulo, Brazil were included. Presence of anti-HEV IgG was assessed by enzyme-linked immunosorbent assay (WANTAI HEV-IgG ELISA).  Results: Out of the 618 patients tested, 10.2% turned out positive for anti-HEV IgG (95% CI 8.0–12.8%)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatitis E virus; Hepatitis C virus; Brazil; Seroprevalence.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000200085

Seroprevalence of chikungunya virus infection in five hospitals within Anyigba, Kogi State of Nigeria
Provedor de dados: 55
Autores: Omatola,Cornelius A.; Onoja,Bernard A.; Fassan,Peter K.; Osaruyi,Stephanie A.; Iyeh,Mercy; Samuel,Matthew A.; Haruna,Peace U.
ABSTRACT Febrile illnesses in developing countries are often misdiagnosed as malaria or typhoid fever. Although arboviral infections have similar clinical symptoms, they are usually not screened because of limited resources and the fact that there are several viruses in this group. Chikungunya virus (CHIKV) has been isolated in parts of Nigeria, but there is no documented evidence of the infection in Kogi State. This study determined seroprevalence of active and past CHIKV infection among febrile patients who tested negative for malaria and typhoid fever. Sera from 243 febrile patients were screened for CHIKV IgG and IgM using an immunochromatographic test kit. Clinical and socio-demographic variables were collected using a structured questionnaire. Recent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chikungunya; Fever; Seroprevalence; IgM; IgG; Nigeria.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702020000100001

HBV, HCV and HIV seroprevalence among blood donors in Istanbul, Turkey: how effective are the changes in the national blood transfusion policies?
Provedor de dados: 55
Autores: Acar,Ali; Kemahli,Sabri; Altunay,Husnu; Kosan,Erdogan; Oncul,Oral; Gorenek,Levent; Cavuslu,Saban.
The national blood transfusion policies have been changed significantly in recent years in Turkey. The purpose of this study was to determine the prevalence of HBV, HCV, and HIV in blood donors at the Red Crescent Center in Istanbul and to evaluate the effect of changes in the national blood transfusion policies on the prevalence of these infections. The screening results of 72695 blood donations at the Red Crescent Center in Istanbul between January and December 2007 were evaluated retrospectively. HBsAg, anti-HCV, and anti-HIV-1/2 were screened by microparticle enzyme immunoassay (MEIA) method. Samples found to be positive for anti-HIV 1/2 and anti-HCV were confirmed by Inno-Lia HCV Ab III and Inno-Lia HIV I/II Score, respectively. The seropositivity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HBV; HCV; HIV; Seroprevalence; Blood donors; Turkey.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000100009

Seroprevalence of hepatitis B and hepatitis C markers among children and adolescents in the south brazilian region: metropolitan area of Florianópolis, Santa Catarina
Provedor de dados: 55
Autores: Voigt,Andréia Royer; Strazer Neto,Miguel; Spada,Celso; Treitinger,Arício.
Hepatitis B and C are important causes of morbidity and mortality worldwide. In Brazil, according to the Ministry of Health, about 15% of population is infected by hepatitis B virus (HBV) and less than 1% by hepatitis C virus (HCV). Nevertheless, the age-specific prevalence of HBV and HCV markers remains unknown. This study aimed to determine the seroprevalence of HBV and HCV markers of infection and immunity in children and adolescents between 10 to 16 years old who live in the metropolitan area of Florianópolis, state of Santa Catarina, South of Brazil. Three hundred and eighty four individuals were enrolled in this study. Serological markers for HBV and HCV (HBsAg, total anti-HBc, anti-HBc IgM, anti-HBs and anti-HCV) were determined through...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HBV; HCV; HBsAg; Anti-HBs; Anti-HBc; Anti-HCV; Seroprevalence.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000100012

High prevalence of hepatitis E virus antibodies in Sao Paulo, Southeastern Brazil: analysis of a group of blood donors representative of the general population
Provedor de dados: 55
Autores: Passos-Castilho,Ana Maria; Reinaldo,Mônica Renata; Sena,Anne de; Granato,Celso F.H.
Abstract Brazil is a non-endemic country for hepatitis E virus (HEV) infection with seroprevalence from 1% to 4% in blood donors and the general population. However, data on seroprevalence of HEV in the country are still limited. This study evaluated the prevalence of past or present HEV infection in a group of blood donors representative of the general population of the city of Sao Paulo, Southeastern Brazil. Serum samples from 500 blood donors were tested from July to September 2014 by serological and molecular methods. Anti-HEV IgG antibodies were detected in 49 (9.8%) subjects and categorized age groups revealed an age-dependent increase of HEV seroprevalence. Among the anti-HEV IgG positive subjects, only 1 had anti-HEV IgM while none tested positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatitis E virus; Blood donors; Seroprevalence; Brazil.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000500535

Syphilis and HIV-1 among parturient women in Salvador, Brazil: low prevalence of syphilis and high rate of loss to follow-up in HIV-infected women
Provedor de dados: 55
Autores: Nóbrega,Isabella; Dantas,Paula; Rocha,Priscila; Rios,Isabela; Abraão,Marcos; M. Netto,Eduardo; Brites,Carlos.
BACKGROUND: The occurrence of syphilis and HIV-1 infections during pregnancy are major risks to the fetus due to mother-to-child transmission (MTCT). OBJECTIVES: To determine peripartum seroprevalence and risk factors of syphilis and HIV-1 infection among pregnant women in Salvador, Brazil, and the rate of HIV-1 MTCT. METHODS:Cross-sectional study of pregnant women who were admitted for delivery in a reference maternity hospital between May 2008 and March 2009 was conducted. Women were screened for HIV-1 infection and syphilis, and interviewed regarding demographic, behavioral and obstetric data. Newborns to HIV-infected mothers were tested by b-DNA and DNA-PCR to detect HIV-1. RESULTS: A total 3300/8516 women were evaluated. Mean age was 25.8 ± 7.3 years....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human immunodeficiency virus; Syphilis; Seroprevalence; Risk factors; Parturient; Pregnant; Mother-to-child transmission; Brazil.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000200012

Seroprevalence of hepatitis B surface antigen and its correlation with risk factors among new recruits in Turkey
Provedor de dados: 55
Autores: Altay,Tulin; Uskun,Ersin; Akcam,Fusun Zeynep.
OBJECTIVES: The objective of this cross-sectional study was to determine seroprevalence of hepatitis B surface antigen and related risk factors among new recruits in a military unit in Turkey. METHODS: Eight thousand five hundred eighty-nine newly-recruited soldiers were enrolled in the study. Blood samples were drawn from them between January 2006 and December 2006 and ELISA technique was applied to the samples. In addition, questions on the risk factors of hepatitis B exposure were asked to the participants in the survey. RESULTS: The results demonstrated that HBsAg seroprevalence was 2.8%. Further survey results indicated that seropositivity increased depending on certain risk factors. In multiple regression analysis, significant correlations were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seroprevalence; Hepatitis B surface antigen; HBsAg.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000400005

Dried blood spot testing for the antenatal screening of HTLV, HIV, syphilis, toxoplasmosis and hepatitis B and C: prevalence, accuracy and operational aspects
Provedor de dados: 55
Autores: Boa-Sorte,Ney; Purificação,Antônio; Amorim,Tatiana; Assunção,Lorena; Reis,Alan; Galvão-Castro,Bernardo.
Introduction:Screening for vertically transmitted infection is mandatory and must be conducted at the first prenatal consultation. The most vulnerable women's groups are those at the lowest socio-economic level. Dried blood spot testing on filter paper could represent a secure way to screen pregnant women in the prenatal period.Methods:A cross-sectional study was conducted between November 2009 and March 2010, in the Metropolitan Region of Salvador, Bahia, Brazil, to compare the accuracy of the dried blood spot in filter paper and venipuncture serological as screening methods for HIV, HTLV, VHB, VHC, Treponema pallidum, and Toxoplasma gondii during prenatal period. Results of the venous blood sample collected in tubes were considered the gold...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prenatal care; Infectious diseases; Seroprevalence; Dried blood spot testinga.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000600618

Seroprevalence and risk factors associated with Helicobacter pylori infection in blood donors in Salvador, Northeast-Brazil
Provedor de dados: 55
Autores: Lyra,Andre C.; Santana,Genoile; Santana,Nelma; Silvany-Neto,Anibal; Magalhães,Emilia; Pereira,Eduardo M.; Mascarenhas,Ramiro; Lyra,Marcos C.; Veiga,Andrea; Ferreira,Karina; Zaterka,Schilioma; Lyra,Luiz G.
Helicobacter pylori plays an important role in the etiology of peptic ulcer disease. Its prevalence appears to be higher in developing countries. We evaluated the seroprevalence of H. pylori and risk factors associated with infection in voluntary blood donors who attended the main blood center of the city of Salvador, Brazil. The subjects responded to an epidemiological questionnaire, with information about sex, age, race, lifestyle, social-economic level indicators, and residence and hygiene conditions. Anti-H. pylori antibody was determined by ELISA (Cobas Core, Roche). Three hundred and seven subjects were included in the study. Anti-H. pylori antibody results were indeterminate in 33 individuals (10.8%), who were excluded from analysis. Among the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: H. pylori; Seroprevalence; Risk factors; Brazil.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000500009

Seroprevalence of human herpesvirus 8 infection in children born to HIV-1- infected women in São Paulo, Brazil
Provedor de dados: 56
Autores: Machado,D.M.; Sumita,L.M.; Pannuti,C.S.; Succi,R.C.M.; Moraes-Pinto,M.I.; Souza,V.A.U.F.
Human herpesvirus-8 (HHV-8) appears to be transmitted mainly by sexual contact. However, several studies suggest that in developing countries the infection may be acquired early in life by routes other than sexual transmission. The present study estimated the seroprevalence of HHV-8 in Brazilian children born to HIV-1-infected mothers. The serum samples were collected in a cross-sectional cohort study from 99 children born to HIV-infected mothers (median age 3.27 years; range 1.5-13.8 years) attending the outpatient clinic of the Federal University of São Paulo. IgG antibodies to HHV-8 latency-associated nuclear antigen and lytic phase antigens were detected by immunofluorescence assays. The samples tested were collected from children aged 12 months or...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: HHV-8; Seroprevalence; AIDS; Children; LANA-IFA; Lytic-IFA.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000200012

Prevalence of hepatitis C virus (HCV) infection and HCV genotypes of hemodialysis patients in Salvador, Northeastern Brazil
Provedor de dados: 56
Autores: Silva,L.K.; Silva,M.B.S.; Rodart,I.F.; Lopes,G.B.; Costa,F.Q.; Melo,M.E.; Gusmão,E.; Reis,M.G.
Hepatitis C virus (HCV) infection has been identified as the major cause of chronic liver disease among patients on chronic hemodialysis (HD), despite the important reduction in risks obtained by testing candidate blood donors for anti-HCV antibodies and the use of recombinant erythropoietin to treat anemia. A cross-sectional study was performed to estimate the prevalence of HCV infection and genotypes among HD patients in Salvador, Northeastern Brazil. Anti-HCV seroprevalence was determined by ELISA in 1243 HD patients from all ten different dialysis centers of the city. HCV infection was confirmed by RT-PCR and genotyping was performed by restriction fragment length polymorphism. Anti-HCV seroprevalence among HD patients was 10.5% (95% CI: 8.8-12.3)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatitis C; Seroprevalence; Viremia; Hemodialysis; Genotype; Brazil.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000500005

Prevalence of antibodies to human herpesvirus-8 in populations with and without risk for infection in São Paulo State
Provedor de dados: 56
Autores: Souza,V.A.U.F.; Sumita,L.M.; Freire,W.; Sato,H.K.; Grandi,J.L.; Pierrotti,L.C.; Nascimento,M.C.; Pannuti,C.S.
Human herpesvirus 8 (HHV-8) is a newly described herpesvirus that is etiologically associated with all forms of Kaposi's sarcoma (KS). Seroepidemiological studies have shown high prevalence rates of HHV-8 antibodies among men who have sex with men (MSM) and AIDS patients, African children, Brazilian Amerindians, and elderly individuals in certain regions of Europe. The aim of the present study was to determine the prevalence of HHV-8 antibodies in healthy children and young adults from different cities in São Paulo State, and in a population at high risk for HHV-8 infection: HIV-negative MSM, and AIDS patients with and without KS. Antibodies to HHV-8 latency-associated nuclear antigen and lytic-phase antigens were detected by immunofluorescence assays. In...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: HHV-8; Seroprevalence; AIDS; Kaposi's sarcoma; Immunofluorescence assay; Latency-associated nuclear antigen; Lytic-phase antigens.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000100017

Seroprevalence of Borrelia burgdorferi in occupationally exposed persons in the Belgrade area, Serbia
Provedor de dados: 58
Autores: Jovanovic,Dragutin; Atanasievska,Sonja; Protic-Djokic,Vesna; Rakic,Uros; Lukac-Radoncic,Elvira; Ristanovic,Elizabeta.
Lyme disease (LD) is a natural focal zoonotic disease caused by Borrelia burgdorferi, which is mainly transmitted through infected Ixodes ricinus tick bites. The presence and abundance of ticks in various habitats, the infectivity rate, as well as prolonged human exposure to ticks are factors that may affect the infection risk as well as the incidence of LD. In recent years, 20% to 25% of ticks infected with different borrelial species, as well as about 5,300 citizens with LD, have been registered in the Belgrade area. Many of the patients reported tick bites in city’s grassy areas. The aim of this study was to assess the seroprevalence of B. burgdorferi in high-risk groups (forestry workers and soldiers) in the Belgrade area, and to compare the results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Borrelia burgdorferi; Lyme disease; Seroprevalence; Forestry workers; Soldiers.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300807

Human leptospirosis: occurrence of serovars of Leptospira spp. in the state of Minas Gerais, Brazil, from 2008 to 2012
Provedor de dados: 58
Autores: Oliveira,Marluce Aparecida Assunção; Leal,Élida Aparecida; Correia,Max Assunção; Serufo Filho,José Carlos; Dias,Ricardo Souza; Serufo,José Carlos.
Abstract  Background: Leptospirosis is an infectious and acute disease caused by Leptospira spp. that have high epidemic potential. This study verified the main Leptospira spp. serovars detected by MAT from serum of patients with suspicion of leptospirosis from 2008 to 2012 in Minas Gerais State.  Methods: The laboratory received sera from 4654 patients. All serum were screened by IgM-ELISA according to the manufacturer's instructions. Each sample reactive or indeterminate were tested against twenty-four serovars of Leptospira by MAT.  Results: In this study, 597 patients were classified as reactive on MAT. Only 301 patients were confirmed by laboratory test. It was not possible confirmation by laboratory diagnosis of 296 patients. Among the samples...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptospira; Serovar; Seroprevalence; Epidemiology; MAT.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300483

Seroprevalence and risk factors of antibodies against Leptospira spp. in ovines from Uberlândia municipality, Minas Gerais state, Brazil
Provedor de dados: 58
Autores: Salaberry,Sandra R.S.; Castro,Vanessa; Nassar,Alessandra F.C.; Castro,Jacqueline R.; Guimarães,Ednaldo C.; Lima-Ribeiro,Anna M.C.
The objectives of the present study were to verify the seroprevalence of anti-Leptospira spp. antibodies, identify the most frequent serovars and the risk factors associated with the infection in Uberlândia, Minas Gerais, Brazil . A total of 334 ovines blood samples were collected in 12 farms from Uberlândia municipality to be evaluated by means the Microscopic Agglutination Test (MAT) against 22 serovars of Leptospira spp. and an epidemiologic questionnaire was applied for each farm in order to correlate with risk factors of leptospirosis: sex, age and breed as well as contact with cattle, contact with dogs and presence of rodents. The prevalence of seropositive to MAT was found in seventy four ovines (22.2%; CI 95% 17.6-26.4%), with titers ranging from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptospirosis; Seroprevalence; Serovars; Sheep.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400026

Seroprevalence of Hepatitis B and C markers at the population level in the municipality of Caxias do Sul, southern Brazil
Provedor de dados: 58
Autores: Menegol,Débora; Spilki,Fernando Rosado.
Chronic viral hepatitis are main public health problems worldwide. Data about the seroprevalence to Hepatitis B and C viruses (HBV e HCV) at the population level are scarce on Brazil and especially for the Southern region of the country. The seroprevalence to HBV and HBC antigens was evaluated on a large portion of the population of the municipality of Caxias do Sul (427,858 inhabitants), Brazil. A total of 60,604 individual serum samples collected from 2008 to 2011 were screened for HBV surface antigen (HBsAg) and for antibodies against HBsAg; anti HCV antibodies were measured by ELISA (Enzyme Linked Immunosorbent Assay). Overall, 1.63% of the individuals were positive for HBsAg and 1.43% showed seropositivity to HCV. From the total, 31,749 samples were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatitis B virus; Hepatitis C virus; Seroprevalence.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400030

Seroprevalence of HBV and HCV markers among young adult males in the Air Force in Florianópolis, South Brazil
Provedor de dados: 60
Autores: Passos,Ana Maria; Strazer Neto,Miguel; Treitinger,Aricio; Spada,Celso.
We investigated the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) serological markers of infection in young adults from the metropolitan region of Florianópolis who were conscripts of the Air Base of Florianópolis in the state of Santa Catarina, Brazil. A population-based cross-sectional seroprevalence study was conducted with 371 young males during a one year period starting in June 2009. Demographic characteristics, socio-economic characteristics and possible risk factors to HBV and HCV were assessed. Blood samples were analyzed for HBsAg, anti-HBc, anti-HCV and anti-HBs through automated microparticle enzymatic immunoassays (Abbott®, AxSYM System, Wiesbaden, Germany). None of the participants showed positivity to HBsAg or anti-HCV....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HBV; HCV; Hepatitis B; Hepatitis C; Seroprevalence.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000200009

Occurrence of Toxoplasma gondii antibodies in lowland tapirs maintained ex situ in Brazil and Paraguay
Provedor de dados: 65
Autores: Gondim,Maria Fernanda Naegeli; Acosta,Igor da Cunha Lima; Rangel,Maria Cristina Valdetaro; Soares,Herbert Sousa; Gennari,Solange Maria; Dubey,Jitender Prakash; Cubas,Zalmir Silvino; Moraes,Wanderlei de; Chaparro,Francisco Javier Sosa; Barreto,Francisco Candido Cardoso; Rossi Junior,João Luiz.
ABSTRACT: Lowland Tapir ( Tapirus terrestris ) is the second largest South American land mammal. It is strictly herbivorous and its exposure to  Toxoplasma gondii should be indicative of environmental contamination by oocysts.In the present study antibodies to  T. gondii in 47 Brazilian tapirs maintained ex situ in 10 Brazilian and in one Paraguayan institution were sought in serum samples by the modified agglutination test (MAT ≥25). None of the animals presented clinical signs during the study. From 47 animals 35 (74.5%) were positive with titers of 25 in 8, 50 in 6, 100 in 12, 200 in 5, 400 in 1 and 800 in 3. One animal had samples collected on twice, and 19 were born in captivity. There was no association between occurrence of T. gondii antibodies and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ex situ; Lowland tapir; Tapirus terrestris; Toxoplasma gondii; Seroprevalence.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300502

Seroprevalence of bovine echinococcusis in Pakistan
Provedor de dados: 65
Autores: Aziz,Fariha; Tasawar,Zahida; Lashari,Mushtaq Hussain.
ABSTRACT: Cystic echinococcosis is a parasitic infection of worldwide distribution, which, despite causing significant loss of health and money, is still a neglected disease. The present study was performed to determine the prevalence of bovine hydatid disease at Research Centre for the Conservation of Sahiwal Cattle, Jahangirabad, Khanewal, Pakistan. Five hundred bovine serum samples were tested for the detection of bovine Echinococcus antibodies (IgG), using the ELISA kits. Antibodies of bovine Echinococcus were detected in 24.2% cattle. Female cattle showed higher disease prevalence (33.2%) compared to (6.02%) in male cattle. There was positive association between sex of cattle and prevalence (P&lt;0.05). Positive correlation between disease prevalence...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echinococcus antibodies; Seroprevalence; ELISA; Age; Sex.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400501

Anti-Neospora caninum antibodies in beef cattle from the northern region of Paraná state, Brazil
Provedor de dados: 65
Autores: Guerra,Joice Loures; Okano,Werner; Bogado,Alexey Leon Gomel; Nino,Beatriz de Souza Lima; Martins,Felippe Danyel Cardoso; Cardim,Sérgio Tosi; Barros,Luiz Daniel de; Garcia,João Luis.
ABSTRACT:  The presence of anti-Neospora caninum antibodies in beef cattle slaughtered in the northern region of the state of Paraná, Brazil, was evaluated. A total of 401 blood samples were collected; 281 samples from the municipality of Rolândia and 120 from the municipality of Borrazópolis, between April 2015 and November 2016. Of the total samples, 289 were from females and 112 from males, aged one and a half to eight years. Indirect fluorescent antibody test (IFAT) was performed, using a cut-off of 1:100. Variables were tabulated for statistical analyses (Fisher’s exact test and chi-square tests, p≤0.05). The analysis showed that of the 401 samples, 37 were positive for N. caninum, indicating a prevalence of 9.2 %, and observed titers were 1:100 (16),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neosporosis; Seroprevalence; IFAT; Cattle; Paraná state.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500500