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Am. J. Trop. Med. Hyg., 27(6), 1978, pp. 1240-1245
Copyright © 1978 by The American Society of Tropical Medicine and Hygiene

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Eastern Equine Encephalomyelitis in Upstate New York: Studies of a 1976 Epizootic by a Modified Serologic Technique, Hemagglutination Reduction, for Rapid Detection of Virus Infections*

S. Srihongse, M. A. Grayson, C. D. Morris, R. Deibel AND C. S. Duncan
Division of Laboratories and Research, New York State Department of Health, Albany, New York 12201, Bureau of Disease Control, New York State Department of Health, Regional Office, Syracuse, New York 13202, and New York State Department of Agriculture and Markets, Albany, New York 12235

An extensive outbreak of eastern equine encephalomyelitis (EEE) occurred in upstate New York during the summer of 1976, with 37 cases confirmed in horses by isolation of virus and/or by serologic examination. Other specimens collected in the affected area yielded 16 further isolates: 9 from 818 pools of 33,365 mosquitoes, 5 from tissues of 64 birds, and 2 from 4 sentinel pheasants with serologic conversions. EEE antibodies were also detected in 81 of 499 wild birds tested. Our data implicate sparrows, cowbirds, and catbirds in the amplification of EEE virus and Culiseta melanura mosquitoes as vectors among avians. During the course of this epizootic a modified serologic technique involving hemagglutination reduction gave reliable diagnoses of EEE as early as 24 hours after receipt of field specimens.

Accepted for publication April 29, 1978.


* Presented in part at the 77th annual meeting of the American Society for Microbiology in New Orleans, Louisiana, 12 May 1977.






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Copyright © 1978 by the American Society of Tropical Medicine and Hygiene.