| [presence of antibodies for hepatitis a virus in didelphis marsupialis (vertebrata. marsupialia) of the amazon region]. | | 1987 | 2827292 |
| outbreak of hepatitis b virus in recent arrivals to the brazilian amazon. | an outbreak of acute hepatitis cases in a small community took place 6 months after the community's arrival to the brazilian amazon. an epidemiological investigation was performed and included residents aged more than two years. study subjects were interviewed and bled to test for hepatitis markers by enzyme immunoassays. around 80% of the village population was surveyed. the overall prevalence of hepatitis b virus (hbv) markers was 75.1% (281/374). the surface antigen of hbv (hbsag) and the igm ... | 1998 | 9700626 |
| [hepatitis a virus infection in amerindian area in the east brazilian amazon]. | the hepatitis a virus infection represents an important problem of public health all over the world, being related to the socioeconomic and hygienic conditions of the population. in brazilian amazon, seroepidemiological studies in amerindians populations have been demonstrating high endemicity related to the infection. with the objective of evaluate the prevalence of the hepatitis virus a infection in xicrin village, in the municipality district of altamira-pará-brazil, whose investigation was u ... | 2004 | 15586897 |
| epidemiology of hepatitis a and e virus infection in brazil. | this review has the objective to discuss the epidemiological aspects of the enterically transmitted hepatitis a and e in brazil. the prevalence of hepatitis a varies greatly in different brazilian regions, from 56% in south and southeast to 93% in north region (manaus, amazon). such differences are also found in different socioeconomic levels among age groups. a significantly higher prevalence was seen in the low socioeconomic group between 1-30 years. this difference is most striking in the fir ... | 2005 | 15771857 |
| molecular epidemiology of hepatitis a virus in brazilian amazon. | hepatitis a virus (hav) is highly endemic in the amazon. however, few data are available regarding hav genotypes circulating in this region of the world. the aim of the present study was to characterize genetically hav isolates circulating in the brazilian part of the amazon. | 2006 | 16911689 |
| hepatitis a virus in environmental water samples from the amazon basin. | hepatitis a virus (hav) is a significant waterborne human pathogen. of the global supply of potable water, brazil retains 13%, of which 75% resides in the amazon basin. although hepatitis a morbidity has declined progressively in brazil as a whole, it remains high in the amazon region. we used nested and real-time reverse-transcription polymerase chain reaction (rt-pcr) to detect and quantify the viral load in water samples from the amazon basin. most samples tested positive (92%), with viral lo ... | 2007 | 17306323 |
| prevalence of hepatitis a virus infection: the paradoxical example of isolated communities in the western brazilian amazon region. | this study evaluated the prevalence of hepatitis a virus infection in the rural area of lábrea, in the western brazilian amazon region. communities and households were selected randomly. serum samples were analyzed by means of the immunoenzymatic method for the presence of total antibodies against hav. the study included 1,499 individuals. the prevalence of anti-hav was 74.6% (95% ci 72.3-76.8). univariate analysis showed associations with age (chi-square for linear trend = 496.003, p < 0.001), ... | 2009 | 19684975 |
| hepatitis a and e seroprevalence and associated risk factors: a community-based cross-sectional survey in rural amazonia. | hepatitis a virus (hav) and hepatitis e virus (hev) are both transmitted by the faecal-oral route, and represent common causes of acute hepatitis in developing countries. the endemicity of hav infection has shifted from high to moderate in brazil. human cases of hev infection seem to be rare, although the virus has been detected in swine livestock and effluents of slaughterhouses. this study was to determine the epidemiology of hepatitis a and e in one of the largest agricultural settlements in ... | 2014 | 25149658 |
| socioeconomic inequities and hepatitis a virus infection in western brazilian amazonian children: spatial distribution and associated factors. | hepatitis a is still a neglected health problem in the world. the most affected areas are the ones with disadvantaged socioeconomic conditions. in brazil, seroprevalence studies showed that 64.7 % of the general population has antibodies against hav (hepatitis a virus), and the amazon region has the highest seroprevalence in the country. | 2015 | 26471064 |