120 



The contents of variolous pustules, like other pus often 

 contains micrococci. No trustworthy observation of the 

 presence of bacteria in the blood during this disease has 

 been recorded. Ehrlich has sought them in vain even 

 in hernorrhagic small-pox. Post-mortem they are some- 

 times found in the tissues. 



Fig. 12. Edge of bacterial colony in the liver from typhoid fever ; the indi- 

 vidual bacilli are seen, x 700. (Koch.) 



In diphtheria micrococci are often found not only in 

 the local necrotic tissue, but also in internal organs and 

 in the blood. In scarlatina no reliable affirmative ob- 

 servations have been made, so far as I am aware. But 

 since diphtheria, scarlatina, and erysipelas must be classed 

 according to clinical, experimental, and chemical (Brieger) 

 evidence with the putrid diseases, the evidence in favor 



