| a large outbreak of hepatitis a in a day-care center: association with non-toilet-trained children and persistence of igm antibody to hepatitis a virus. | in early summer, 1979, a large outbreak of hepatitis a occurred in an oklahoma day-care center. a total of 41 cases were confirmed, all in adults. of the 115 non-employee households represented by children in the center, 19 households (16.5%) had one or more cases of hepatitis. hepatitis occurred in 29% of the households with at least one non-toilet-trained child, compared to 2% of the households without such a child (p = 0.00004). at least four (15%) of 27 center employees had hepatitis. of 26 ... | 1982 | 6278926 |