MICRO-ORGANISMS IN VARIOUS DISEASES. 193 



typhoid bacillus, the strengths given for the 

 various disinfectants in typhoid being 

 sufficient, 

 (g) Prophylaxis: When the disease prevails boil all 

 water and cook well all foods; eat neither 

 fruits nor vegetables raw; use same pre- 

 cautions as in typhoid. 



Erysipelas. 



(a) Cause: Streptococcus pyogenes; does not form j^ 



spores. 



(b) Localization: Skin, or any wound that becomes 



infected with the micro-organism. 



(c) Entry : Wounds or abrasions of skin and mucous 



membranes. 



(d) Exit : In pus and secretions from the seat of the 



inflammation ; also probably in the desqua- 

 mating skin from an inflamed area. 



(e) Contracted : Is highly contagious to any one with 



a wound; to a woman about to he confined^ 

 or in the puerperium; may be conveyed by 

 fomites, instruments, etc. 



(f) Disinfection: 100° C. (212° F.) moist, kills the 



streptococcus at once; all discharges 

 should be disinfected with the solutions in 

 the strengths recommended ; urine should 

 certainly be disinfected ; room, patient, and 

 bedding, clothing, etc., should be treated 

 13 



