454 VETERINARY BACTERIOLOGY 



Spirochaeta pertenois 



Synonym. Treponema pertenuis. 



Disease Produced. Yaws in man. 



Castellani, in 1905, reported the occurrence of spirochetes in a 

 tropical disease known as yaws. The organism resembles that 

 of syphilis, but is probably distinct, as shown by inoculation 

 experiments and study of specific antigens and antibodies in com- 

 parison with those of syphilis. 



OTHER SPIROCHETES 



Dodd, in 1906, found a spirochete in a disease of the pig in 

 South Africa. It was associated principally with dark, hemor- 

 rhagic lesions of the skin. 



Spirochetes may be found in considerable numbers in the 

 mouth, and, under certain conditions, in the intestinal tract, upon 

 the skin, and about the genitalia. They are, for the most part, 

 believed to be harmless commensals. 



