Serological survey of markers of infection with viral hepatitis among the Yukpa Amerindians from western Venezuela

Blitz-Dorfman, L; Monsalve, Francisca; Atencio, Ricardo; Porto, Leticia; Monzón, Mario D.; Favorov, Michael O.; Fields, Howard A.; Pujol, Flor H.; Echevarría, J M

doi:10.1080/00034983.1996.11813098

Cited by 22 publications

(10 citation statements)

References 6 publications

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“…However, reagents used to perform the study were primitive, and further studies are required before qualifying this region of Bolivia as highly endemic for HHEV. Rates recorded in the Bolivian Amazon in the same report (up to 26% among the Yurakare Amerindians) were also higher than the rates found before among Amerindian populations from tropical forests of Venezuela outside the Amazon (5.4 and 9.7%) [50, 51]. New data obtained with updated reagents will eventually enlighten the epidemiology of HHEV in the tropical woodlands of South America and confirm the differences they may display.…”

Section: A Look On the Datamentioning

confidence: 64%

Light and Darkness: Prevalence of Hepatitis E Virus Infection among the General Population

Echevarría

2014

Scientifica

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Human hepatitis E virus (HHEV) spreads early in life among the population in areas endemic for genotype 1 and infects mainly adults in areas endemic for genotype 3, where it would be responsible for about 10% of cases of suspected acute viral hepatitis of unknown etiology and for a number of subclinical, unrecognized infections. The overall prevalence of antibody to HHEV is high in most of the former areas and low in most of the later ones, but wide regional differences have been recorded in both cases. “Hot spots” of HHEV infection would exist for both types of strains in particular regions or among particular populations of the world. Studies on pork derivatives, shellfish bivalves, and vegetables for HHEV contamination at the sale point need to be extended for evaluating the impact of the agent on food safety, and the meaning of the finding of HHEV genotype 1 genomes in urban sewage from developed countries should be established through active surveillance. Consensus about technical issues in regard to anti-HEV testing would improve the knowledge of the HHEV epidemiology. Studies in particular regions and populations, and introduction of molecular diagnosis in the clinical setting as a routine tool, would also be required.

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Section: A Look On the Datamentioning

confidence: 64%

Light and Darkness: Prevalence of Hepatitis E Virus Infection among the General Population

Echevarría

2014

Scientifica

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“…América Latina se considera una región de baja endemia, con excepción de México. La infección por HEV se ha descrito en diferentes poblaciones de Brasil (21)(22)(23)(24)(25)30,38), Argentina (39,40), Venezuela (32,35,41), Bolivia (26,31,34,42), Chile (27,43) Teniendo en cuenta el pico de incidencia de la infección por HEV en pacientes de 15 a 35 años de edad descrito en la literatura científica, en el grupo 2 se incluyeron muestras de pacientes con 15 años o más de edad (54,55). Una diferencia adicional entre los grupos consistió en que 31,9 % (29/91) de las muestras del grupo 2 fueron positivas para el marcador de infección aguda por HAV (IgM anti-HAV), muestras que no se excluyeron en el presente análisis.…”

Section: Discussionunclassified

“…También se han hecho algunos estudios en población indígena en Bolivia, Venezuela y Chile, en los cuales se ha demostrado una seropositividad para HEV entre 5,4 y 20,1 % (27,32,34,35). En trabajos realizados en Chile y Perú en grupos de riesgo, como trabajadores de la salud, presidiarios y operarios del sistema de agua y alcantarillado, se detectaron anticuerpos anti-HEV en un rango de 7,5 a 12,5 % de las muestras (36).…”

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Infección por el virus de la hepatitis E en pacientes con diagnóstico clínico de hepatitis viral en Colombia

et al. 2014

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“…1996; de Paula et al. 2001); in Sierra de Perijá (NW Venezuela), prevalences of 5.6–9.6% HBsAg and 62.1–71.2% anti‐HBc were found in Yucpa and 11.1% HBsAg and 64.4% anti‐HBc in Bari Amerindians (Blitz‐Dorfman et al. 1996).…”

Section: Discussionmentioning

confidence: 99%

A comparative epidemiological study of hepatitis B and hepatitis D virus infections in Yanomami and Piaroa Amerindians of Amazonas State, Venezuela

Duarte¹,

Cardona²,

Poblete³

et al. 2010

Tropical Medicine &Amp; International Health

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Summaryobjectives To report the prevalences of hepatitis B (HBV) and hepatitis D (HDV) infections in remote and more accessible Yanomami and Piaroa Venezuelan Amazonian Amerindian populations; to estimate incidence per susceptible.methods Clinico-epidemiological evaluation was carried out in 9 Piaroa villages. Blood samples were tested for HBV core antibody (anti-HBc), surface antigen (HBsAg) and HDV antibody (anti-HDV).Results were analysed using logistic regression, and estimates made of HBV forces of infection (FOI). Prevalences and FOI were also estimated for 4 Yanomami villages.results Mean Piaroa anti-HBc and HBsAg prevalences were 27.4% and 5.1%, respectively (up to 53% and 19% in the remote Autana region). Mean Yanomami anti-HBc and HBsAg prevalences were, respectively, 58.0% (range 43-70%) and 14.3% (31% in the village with highest HBsAg). No significant difference was found between sexes, with age and maternal HBsAg the only risk factors for HBV identified in multivariate regression of Piaroa data. Only 4 Piaroa and 2 Yanomami individuals were anti-HDV positive.conclusion Piaroa HBV prevalences were generally higher in remote villages than in less remote ones, with prevalences in Yanomami villages even higher. Anti-HBc prevalence was 47% in one Yanomami village with a history of HBV vaccination but no HBsAg cases were identified, suggestive of previously cleared or possibly transient infection or vaccine escape. Despite a past history of HDV epidemic outbreaks and HBsAg levels in some villages appearing sufficient to facilitate HDV transmission, anti-HDV prevalence was low; it remains to be established why no recent outbreaks have been reported.

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Serological survey of markers of infection with viral hepatitis among the Yukpa Amerindians from western Venezuela

Cited by 22 publications

References 6 publications

Light and Darkness: Prevalence of Hepatitis E Virus Infection among the General Population

Light and Darkness: Prevalence of Hepatitis E Virus Infection among the General Population

Infección por el virus de la hepatitis E en pacientes con diagnóstico clínico de hepatitis viral en Colombia

A comparative epidemiological study of hepatitis B and hepatitis D virus infections in Yanomami and Piaroa Amerindians of Amazonas State, Venezuela

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