Zoonotic Potential (Rocky Mountain Spotted Fever and Tularemia) in the Tennessee Valley Region
I. Ecologic Studies of Ticks Infesting Mammals in Land Between the Lakes
Joseph C. Cooney
Joseph C. CooneyTennessee Valley Authority, Muscle Shoals, U.S. Department of Health, Education, and Welfare, Public Health Service, National Institutes of Health, National Institute of Allergy and Infectious Diseases, Rocky Mountain Laboratory, Alabama 35660
Willy BurgdorferTennessee Valley Authority, Muscle Shoals, U.S. Department of Health, Education, and Welfare, Public Health Service, National Institutes of Health, National Institute of Allergy and Infectious Diseases, Rocky Mountain Laboratory, Alabama 35660
Studies were conducted from July 1969 through January 1972 in an outdoor recreation and conservation education area in the Tennessee Valley region to provide information on the occurrence and bionomics of ticks involved in the maintenance and transmission of spotted fever and tularemia in nature. A total of 22,832 ticks of seven species was collected; Amblyomma americanum and Dermacentor variabilis accounted for 95% of the total. Ticks were collected both by dragging and by examination of collected mammals: 16,851 were taken by dragging and 5,981 were taken from 951 animal hosts. The American dog tick, D. variabilis, and the lone star tick, A. americanum, the two established vectors of Rickettsia rickettsi and Francisella tularensis to man in Eastern and Southeastern United States, were found abundantly throughout Land Between the Lakes and were associated with large numbers of deer and raccoons. Other species, such as Haemaphysalis leporispalustris, D. albipictus, Ixodes dentatus, I. cookei, and I. texanus, were also recorded but in small numbers. Data on host relationships and seasonal activities are presented.