90 SPIROCHJETES. 



apparently very large from 36 to 40^ in length by 4fi 

 in breadth. 



Allusion has already been made (page 37) to the 

 spirochaetes found by Carter in S. Arabia. No detailed 

 description of the organism is given, but the writer 

 describes longitudinal fission as taking place and also a 

 process of conjugation. Figures 40 and 48 are copied 

 from his original paper and show some of the forms ob- 

 served ; but the nature of their appearance is so peculiar 

 that it would be premature to draw definite conclusions 

 from the observations thus far made. 



SPIROCH^ETA PITHECI. 



(Thiroux and DufougerS, 1910.) 



Thiroux and Dufouger found spirochaetes in mon- 

 keys (Cercopiihecus patas) suffering from an affection 

 characterised by irregular attacks of fever a condition 

 resembling relapsing fever in man. The organisms 

 were 15 to 20/x in length by o. 25/1 in thickness, and pre- 

 sented five or six curls. Rolled up forms were also seen. 

 The blood of the monkey was infective between the 

 attacks of fever, and the disease was readily trans- 

 missible to mice, less easily to rats. In mice the incu- 

 bation period was two to six days, and death usually 

 occurred on the twenty-fifth or twenty-sixth day after- 

 ward. The spirochaetes were present in one case in the 

 cerebro-spinal fluid, and the monkey in this instance 

 suffered from epileptiform attacks. The authors point 

 out a resemblance to the position and action of the 

 trypanosomes of sleeping sickness. 



SPIROCH^ETA ANSERINA. 



(Sacharoff, 1890.) 



Sacharoff found these organisms in geese suffering 

 from a fatal malady, characterised by fever, wasting 



