Spotted Fever Group Rickettsiae in Dermacentor variabilis from Cape Cod, Massachusetts

1 July 1980

journal article
research article
Published by American Society of Tropical Medicine and Hygiene in The American Journal of Tropical Medicine and Hygiene

Vol. 29 (4) , 691-694
https://doi.org/10.4269/ajtmh.1980.29.691

Abstract

Spotted fever group (SFG) rickettsiae were identified by indirect immunofluorescent antibody tests in 1.1% of 6,956 specimens of Dermacentor variabilis collected on Cape Cod, Massachusetts. Forty-one of 45 rickettsial isolates were serotyped as Rickettsia montana, one as Rickettsia rickettsii, and three were unidentified. Studies of canines and humans with clinical evidence of spotted fever, and of healthy dogs with antibody to SFG rickettsiae, indicated that exposure of the canine population to R. montana was common but that R. montana was not involved in the etiology of spotted fever.

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