384 



Microbes and You 



The family Bartonellaceae includes parasites of erythrocytes in 

 man and other vertebrates, and these organisms may be insect- 

 transmitted. The family Chlamydozoaceae contains obligate intra- 

 cytoplasmic parasites, and one of its members causes the serious 

 eye disease, trachoma. 



RICKETTSIAL DISEASES AND THEIR VECTORS 



ROCKY MOUNTAIN SPOTTED FEVER 



As stated earlier in this chapter the field of rickettsiology had 



its origin in studies concerning the etiology of Rocky Mountain 



spotted fever. This disease was first noted in the Bitter Root 



Valley region of Montana and in the Snake River Valley of Idaho 



t^^i^^^SMf* 



A B 



Fig. 69. Wood ticks. Dermacentor andersoni. (A) male. (B) 

 female. (Courtesy of the Rocky Mountain Laboratory, U.S. Public 

 Health Service, Hamilton, Montana. Photographs by N. J. Kratnis.) 



