37.8 



2. Spirochaete anserina. — Highly pathogenic 

 to geese, death occurring in about a week. The 

 spirochaete closely resembles the former morpho- 

 logically. The blood shows immense quantities 

 of the spirochaetes, and tangles are common. 

 They appear with the pyretic attack and disappear 

 as the temperature falls. Besides geese, ducks are 

 susceptible to inoculation, and, to some extent, 

 hens. 



elC (jaUTnariiTTl) 



Fig. 84 



3. spirochaete [galUnarum). — Affects fowls in 

 Rio de Janeiro. The spirochaetes are found during 

 the pyrexia. Tangles are numerous. Death takes 

 place in four to five days. The spleen and liver 

 are much enlarged. The disease is conveyed by 

 ticks of the genus Argas. When subcutaneotts.., 

 inoculations are made spirochaetes do not appear 

 in the blood until the second day. They then 

 increase until the fifth or sixth day, when they 

 suddenly disappear. 



4 . Spirochaete theilevi. — In cattle in Transvaal 

 and Cameroons. The spirochaetes are actively 

 motile, twenty to thirty m long. Small forms only 

 eight M also occur. In some of the infected animals 

 bacilliform Piroplasma were present. In others, 



