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| Registros recuperados: 38 | |
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| 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 |
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| 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 |
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| 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 |
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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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| 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 |
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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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| 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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| 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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| 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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| 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 |
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| 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 |
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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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| 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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| 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 |
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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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| 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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| 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:... |
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Palavras-chave: Egypt; Seroprevalence; Toxoplasma gondii; Toxoplasmosis. |
| Ano: 2016 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4545 |
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| Registros recuperados: 38 | |
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