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American Journal of Epidemiology Vol. 126, No. 1: 55-68
Copyright © 1987 by The Johns Hopkins University School of Hygiene and Public Health

research-article

EPIZOOTIOLOGY OF HANTAVIRUS INFECTIONS IN BALTIMORE: ISOLATION OF A VIRUS FROM NORWAY RATS, AND CHARACTERISTICS OF INFECTED RAT POPULATIONS

JAMES E. CHILDS1,, GEORGE W. KORCH1, GREGORY E. GLASS1, JAMES W. LEDUC2 and KEERTI V. SHAH1

1Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health 615 N. Wolfe Street, Baltimore, MD 21206
2Department of Epidemiology, United States Army Medical Research Institute of Infectious Diseases Fort Detrick, Frederick, MD

Reprint requests to Dr. James E. Childs

Rats trapped from 14 locations In Baltimore, Maryland, were shown to have antibody to Hantavlrvs. Antibody prevalence rates were higher In residential locations than in parks. Infected rats were obtained continuously over a six-year period from 1980–1985 at five locations, indicating the enzootic nature of this infection In urban rats In the United States. Prevalence of antibody and geometric mean titers increased with rat mass and sexual maturity, suggesting that infections in rats are acquired through age-related mechanisms. Three isolates of Hantavlma were obtained from rats. One of these isolates was shown by serotoglc tests and monoclonal antibody reactivity patterns to be similar, if not identical, to rat virus previously obtained from Philadelphia. The presence of rats in many urban settings and the high prevalence of Hantavlms infection in this species suggest that human exposure to this virus is occurring In the United States, although human disease from this exposure has not been recognized.

disease reservolrs; hemorrhagic fever, epidemic; Rattus norvogkus


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