| prevalence of hepatitis e virus igg antibodies in patients from a referral unit of liver diseases in salvador, bahia, brazil. | hepatitis e virus (hev) is prevalent in asia and africa. recently, it was also described in mexico, but epidemiologic data from other latin american countries are scarce. the seroprevalence of anti-hev in a referral hepatology unit in northern brazil was determined by testing for anti-hev igg in 701 serum samples from our serum bank. specimens analyzed were from 200 blood donors, 79 patients with acute viral hepatitis (avh), 392 hemodialyzed patients, and 30 carriers of schistosomiasis. duplicat ... | 1997 | 9242319 |
| association of helicobacter pylori infection and giardiasis: results from a study of surrogate markers for fecal exposure among children. | to investigate whether helicobacter pylori (h pylori) infection is associated with hepatitis a virus (hav) infection, presence of enteroparasites, and other surrogates of fecal exposure. | 2005 | 15884117 |
| [sociodemographical aspects of seroprevalence of hepatitis a virus in the settlement of cavunge, a semi-arid region of bahia state]. | in cavunge community, a rural village of the dry tropic in bahia state, brazil, a sentinel study on viral hepatitis was developed to characterize the seroprevalence of hepatitis a. the presence of igg anti-hav was analyzed in 891 citizens and 85.9% were positive. the prevalence was similar between genders and increased with age. | 2006 | 16501772 |
| serological markers of hepatitis a, b and c viruses in rural communities of the semiarid brazilian northeast. | in the village of cavunge, located in a dry tropical, semiarid rural region of the state of bahia, brazil, a sentinel study on viral hepatitis is underway. we report on the first part of the study. the objective of this study was to determine the prevalence of serological markers for hepatitis a, b and c in the village. cross sectional study. blood samples were tested for serological markers of hepatitis a (hav), b (hbv) and c (hcv) through elisa-iii assay. in hbsag and anti-hcv carriers, hcv-rn ... | 2006 | 17293918 |
| chronic virus infections supress atopy but not asthma in a set of children from a large latin american city: a cross-section study. | abstract: background: the prevalence of allergic diseases has increased over recent decades in affluent countries, but remains low in rural populations and some non-affluent countries. an explanation for these trends is that increased exposure to infections may provide protection against the development of allergy. in this work we investigated the association between exposure to viral infections in children living in urban brazil and the prevalence of atopy and asthma. methods: school age childr ... | 2011 | 21569568 |