FATE OF TUBERCLE BACILLI OUTSIDE THE ANIMAL BODY 



351 



RESULTS OF 

 TESTS 



The results of the tests of the bovine and the 

 human types exposed in the open, unglazed, cylin- 

 drical jars are given in Tables 25 and 26. The 

 last test in each, made 259 days since first exposed, showed only 

 local tuberculosis in each of the four guinea pigs inoculated. Tho 

 there was not time to determine by cultures and by secondary in- 

 oculations whether these organisms were living, it is likely that 

 they were. The end point in this series was not reached. The 

 tuberculosis produced in the test animals from all other samples, 

 except those dying with acute infection, was severe and general- 

 ized. A typical autopsy is shown in the case of Guinea Pig 1124 

 (Fig. 3), which was inoculated with tubercle bacilli of the human 

 type after exposure for 212 days in running water. 



The results of the tests from the other part of the emulsion of 

 human tubercle bacilli placed in the submerged vase are reported 

 in Table 27. The last test, made on the 259th day, gave gener- 

 alized tuberculosis in the two guinea pigs inoculated. 



FIG. 3. GENERALIZED TUBERCULOSIS IN GUINEA PIG 1124 INOCULATED WITH HUMAN 

 TTTBEKCLK BACIW: AKTKR BRING EXPOSED IN RUNNING WATER FOR 212 DAYS. 



