| immunoglobulin m-specific serologic testing in an outbreak of foodborne viral hepatitis, type a. | ninety-seven symptomatic and five asymptomatic infections with viral hepatitis, type a (102 cases) were identified in members, guests and employees of a private country club in an outbreak associated with consuming food and ice prepared or handled by an employee of the club's kitchen pantry. twenty-three symptomatic persons were tested by differential radioimmunoassay for immunoglobulin m (igm) (acute-phase) hepatitis a antibody (anti-hav) and all 23 were documented to be infected with hepatitis ... | 1980 | 6249120 |