204 



A MANUAL OF BACTERIOLOGY 



(M. scarlatince) is always present in the tissues, 

 organs, and blood; and from both sources sub- 

 cultures of the microbe, when inoculated into 

 healthy cows, produce the disease. For instance, 

 when pure subcultures of the microbe were inocu- 

 lated into calves and cows, the microbe was found 

 in the spleen, kidneys, teats, udders, lung, skin, etc. 

 Fig. 42 represents a section through the skin of 

 the nostril of a calf that had been experimentally 



FIG. 42. SECTION THROUGH SKIN OF THE NOSTRIL OF A CALF THAT HAD 



BEEN EXPERIMENTALLY INFECTED WITH M. SCARLATINA DERIVED FROM 



A HUMAN SOURCE (Klein). 



infected with M. scarlatince derived from a human 

 source. In this figure it will be observed that the 

 microbe is present in large numbers. 



In fact, Dr. Klein's important researches on the 

 relationship existing between the cow - disease, 

 already alluded to, and human scarlatina may be 

 summarised as follows : 



(a) The disease in man and in the cow alike is 

 characterised by closely similar anatomical features 



