108 MICROBES AND HEALTH. 



give Dr. Koch much credit for the discovery of the 

 germ which he claims causes consumption. Other 

 investigators have discovered other germs which they 

 claim may cause consumption. And there may be 

 varieties of germs not yet discovered which inhabit the 

 lungs during this disease. 



Having utterly failed with his tuberculin and his 

 T. K., Dr. Koch has, it is said, turned his attention in 

 another direction. In the Chicago American of Sunday, 

 October 7, 1900, Dr. Koch is quoted as saying: "That 

 the total extirpation of malaria is possible by the use 

 of the preparation which he has compounded." The 

 same journal also states that Dr. Koch "regards it 

 practicable by the addition of processes he has dis- 

 covered, to purge every malarial district and keep it 

 entirely free from malaria." 



In this instance there is no reason to doubt that 

 "history will repeat itself," and that Dr. Koch's secret 

 remedy for malaria will prove as great a humbug as 

 did his tuberculin and his T. R. 



At the present time Dr. Koch is being much dis- 

 cussed by reason of the stand he has recently taken 

 regarding bovine tuberculosis in man. For years State 

 Boards of Health and bacteriologists have been teach- 

 ing the public that cows milk may convey the disease 

 (tuberculosis) from animal to man. Now, Dr. Koch 

 is quoted as saying that "human immunity to bovine 

 infection disposes of the belief of the infection through 

 dairy products, and he considers this source of danger 

 so slight as to be unworthy of precautionary measures." 



Dr. Koch had scarcely made his bow before the Brit- 



