BACTERIAL INOCULATION 



263 



Ulcers, — A variety of bacteria have been identi- 

 fied, the majority of which in chronic and intractable 



Fig. 42. — In this case of typhoid fever a few days after the return of the tempera- 

 ture toinormal during convalescence, dozens of subcutaneous abscesses formed persis- 

 tently for a week or more, requiring daily incisions and drainage. Cultures demonstrated 

 M. aureus in pure state. Observe the immediate effect of a single inoculation of 

 100,000,000 staphylococci. Coincidently with the fall in temperature and general 

 improvement, the opsonic index showed a marked rise. 



cases arise as secondary infections, against which bac- 

 terins may possess Httle value unless the primary in- 



