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American Journal of Epidemiology Vol. 128, No. 4: 839-844
Copyright © 1988 by The Johns Hopkins University School of Hygiene and Public Health

research-article

INVESTIGATION OF AN OUTBREAK OF SALMONELLA ENTERITIDIS GASTROENTERITIS ASSOCIATED WITH CONSUMPTION OF EGGS IN A RESTAURANT CHAIN IN MARYLAND

FENG-YING C. LIN1, J. GLENN MORRIS, JR.2,, DAVID TRUMP1, DWAYNE TILGHMAN3, PATRICK K. WOOD2, NIGEL JACKMAN4, EBENEZER ISRAEL1 and JOSEPH P. LIBONATI3

1 Office of Disease Control and Epidemiology, Maryland Department of Health and Mental Hygiene Baltimore, MD
2 Division of Geographic Medicine, Department of Medicine, and Center for Vaccine Development, University of Maryland School of Medicine Baltimore, MD
3 Division of Microbiology, Maryland Department of Health and Mental Hygiene Baltimore, MD
4 Prince George's County Health Department Cheverly, MD

Send reprint requests to Dr. J. Glenn Morris, Jr., Division of Geographic Medicine, University of Maryland School of Medicine, 10 5. Pine St., Baltimore, MD 21201

Salmonella enteritidis ser. enteritidis was isolated from patrons and employees of three restaurants in a restaurant chain in Maryland during August and September 1985. Isolates from all three restaurants had identical plasmid profiles; this profile was present in 13 of 40 randomly selected S. enteritidis isolates received by the Maryland state health department laboratory during a comparable time period. The outbreak in one restaurant resulted in at least 71 illnesses, with 17 persons known to have been hospitalized. Scrambled eggs served on a "break fast bar" were implicated as the vehicle of transmission in this restaurant, with eggs a possible vehicle in another of the three restaurants. The data point out the risks associated with improper handling of eggs in food service establishments, provide further evidence for the observed association between S. enteritidis and eggs in the northeastern United States, and demonstrate the utility of plasmid analysis in investigation of outbreaks involving common Salmonella serotypes.

eggs; gastroenteritis; Salmonella enteritidis


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