| studies on the outbreak of hepatitis a in an institute for mentally retarded children. | the authors encountered an outbreak of acute hepatitis in a public institute for mentally retarded children in aomori prefecture, japan. studies revealed that the probable vehicles of transmission of infection were contaminated water, contaminated meals, and close contact. from the clinical manifestations and epidemiological investigations of 41 affected children and staff members, an outbreak of hepatitis a was strongly suspected. immune electron microscopy disclosed hepatitis a virus antigen p ... | 1978 | 215486 |