Use of IgM-hepatitis A antibody testing. Investigating a common-source, food borne outbreak

Publisher Website
Google Scholar
Abstract
An outbreak of hepatitis type A affecting 30 employees of a large metropolitan department store was investigated using traditional case findings, a food preference questionnaire and case-control methods. New serological tests for IgM and IgG antibody to hepatitis A virus (anti-HAV) were employed to establish a serological diagnosis of hepatitis A infection, to define the control group and to identify the index case, an asymptomatic food handler. All 25 cases tested had IgM anti-HAV; none of 73 control and 1 of 46 food handlers were IgM anti-HAV positive. This test eliminated 3 suspect cases that were diagnosed as hepatitis but that had atypical epidemiologic features. Epidemiologic and serological analysis confirmed the association of illness with eating in the employees'' cafeteria and eating cold sandwiches.

This publication has 3 references indexed in Scilit: