COXIELLA BURNETI IN A WILDLIFE-LIVESTOCK ENVIRONMENT

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Abstract
En right, J. B. (Dept. of Epidemiology and Preventive Medicine, Univ. of California, Davis, Calif. 95616) W. M. Longhurst, C. E. Franti, D. E. Behymer, V. J. Dutson and M. E. Wright. Coxiella burneti in a wildlife-livestock environment; isolations of rickettsiae from sheep and cattle. Amer J Epidem 94: 72–78, 1971.—Coxiella burneti was studied in sheep and cattle during parturition as part of an ecological investigation of Q fever in an area shared by livestock and wildlife. The rickettsiae were isolated from 13 of 52 (25%) placentas from resident ewes and the milk of 2 postpartum cows. A herd of nonresident cattle was pastured on the sheep range for 6 months, during which time the proportion of the herd with specific antibodies increased from 5 to 71%. The comparatively low antibody titers in sheep and the low virulence of the strains of C. burneti isolated from ewes indicate a possible adjustment in the host-parasite relationship through prolonged sheep-to-sheep transmission.

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