title: Frequency of inapparent hepatitis A infection.
abstract: The frequency of inapparent hepatitis A infection estimated by the detection of IgM anti-HAV in the absence of clinical signs, was found to be very low in two institutions for children. Only 15.4% of the infections are inapparent in department of pediatric psychiatry. Thus, poor hygienic conditions resulting in frequent and massive fecal-oral infections might lead to an increased number of overt hepatitis A infections.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005602:France; D006506:Hepatitis A / Q000175:diagnosis / Q000453:epidemiology*; D035922:Hepatitis A Antibodies; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D007326:Institutionalization
chemical_list: D000914:Antibodies, Viral; D035922:Hepatitis A Antibodies; D007075:Immunoglobulin M