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Q Fever: A Serological Survey of Bovine Serums in the United States

1. Over 1700 serums from cattle in 37 states have been tested in the complement fixation test for Q fever. Twenty-seven positive serums were found from dairy cows in 10 states and from beef cattle in 5 states. The positive serums with two exceptions came from cows in the western two-thirds of the country.

2. Work done on bovine serums with an agglutination test employing R. burneti as antigen is reported briefly. Although many positive reactions were seen, it was thought likely that the reactions were caused by the so-called "natural" agglutinins.

3. The results of the survey of bovine serums by complement fixation suggest that human cases of Q fever should be sought especially in parts of the country from which cases have not so far been reported.

¹ Surgeon, United States Public Health Service

² From the Division of Infectious Diseases, National Institutes of Health, Bethesda 14, Maryland.