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| Registros recuperados: 39 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 (> R$ 500 and < 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 39 | |
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