| [seroepidemiologic study of hepatitis a virus among children of maracaibo, venezuela]. | with the purpose of determining the incidence of hepatitis a virus infection, we determined the presence of antibodies against this virus (anti-vha) with the elisa technique in 209 children from maracaibo city of different socioeconomic levels, ages ranging from 6 months to 12 years. at the same time, we investigated the incidence of a recent infection through igm antibodies for hepatitis a (anti-vha igm) using the same elisa technique. we found a global positive incidence of 46.4% for all ages. ... | 1989 | 2562223 |
| [liver function of workers occupationally exposed to mixed organic solvents in a petrochemical industry]. | a descriptive and cross sectional study was conducted to determine whether hepatic function changes in workers occupationally exposed to a mixture of organic solvents, were due to the exposure or confusing factors. a non random sample of 77 workers, operators and supervisors of the olefin plant i and ii of a petrochemical industry in maracaibo, venezuela, was used. their mean age was 29 +/- 7 years, and had at least one year of exposure to the solvents. this sample was compared with a group of e ... | 2001 | 11416982 |