THE MONKEY 339 



Infection by Coccidium oviforme is very common, 

 without however presenting any symptoms by which 

 the infection may be recognised. . Usually the condi- 

 tion is only noted post-mortem, when the liver is found 

 to be studded with numerous caseating tubercles, 

 which on examination prove to be cystic areas crowded 

 with coccidia. Sometimes too the liver of a rabbit 

 dead from some intentional or accidental bacterial 

 infection is found at the post-mortem to be marked by 

 fine yellowish streaks and small tubercles due to the 

 embryos of Tcenia serrata, while the cystic form 

 (Cysticercus pisiformis) is often noted free in the 

 peritoneal cavity, or invading the mesentery. 



Abscess formation from infection with ordinary 

 pyogenic bacteria occurs naturally in the rabbit, and fre- 

 quently the animal house of a laboratory is decimated 

 by an infective septicaemia due to B. cuniculicida. 



The Mouse and Rat suffer from septicaemia, and from 

 the cysticercus form of Tcunia murina; the cystic form 

 (Cysticercus fasciolaris) of T. crassicollis has its habitat 

 in their livers. These small rodents are frequently 

 infected with scabies, but if freely provided with clean 

 straw will clean themselves by rubbing through it. 

 The mouse is also attacked by favus, and the rat is 

 often infected with Trypanosoma Lewisi. 



The Guinea pig, like the rabbit, suffers from scabies 

 and coccidiosis. In addition it is often naturally 

 infected with B. tuberculosis, and it is a wise precaution 

 to test animals as soon as they reach the laboratory by 

 injecting Koch's Old Tuberculin 0.5 c.c. causing death 

 in the tuberculous cavy within 48 hours. 



The Monkey is naturally prone to tuberculosis, and 

 should be injected with i c.c. Old Tuberculin on 

 arrival in the laboratory. The tissues of the monkey 

 also serve as the habitat for a Nematode worm para- 

 sitic in cattle (CEsophagostoma inflatuni) resembling the 

 Anchylostomum, and this parasite frequently bores 



