454 



BACTERIOLOGICAL ANALYSES 



week and make a complete post-mortem examination. 

 5. If the result of the examination is negative or 



FIG. 215. Cadaver of guinea-pig experimentally infected with 

 B. tuberculosis. 



inconclusive, kill a second guinea-pig at the end of the 

 third week and examine carefully. 



6. If still negative or inconclusive, kill the third 

 guinea-pig at the end of the sixth week. Make a care- 



