title: [Infectious hepatitis. I. Presence of HBs antigen].
abstract: A prospective study in 268 patients of different pediatric ages affected with icteric hepatitis is presented, with a longitudinal follow-up of one year minimum. Different types of clinical evolution are described and related to the presence of HBs antigen. In 34 of the 268 patients HBs antigen was positive; in 20 of 28 patients with acute and long evolution, positivity of the antigen was transitory with an average of 46 days; in the remaining 8 of 28 patients it extended from 6 months to less than 2 years. The presence of HBs antigen is a risk that may be correlated with the tendency to extend the prolonged.
mesh_terms: D002648:Child; D002675:Child, Preschool; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D007223:Infant; D008297:Male; D008800:Mexico
chemical_list: D006511:Hepatitis B Antigens
vernacular_title: Hepatitis infecciosa. I. Presencia del antígeno HBs