MICRO-ORGANISMS IN VARIOUS DISEASES. 207 



physicians should impress upon all syphil- 

 itics the danger to others of contracting 

 the disease from discharges from both the 

 primary (chancer) and secondary (mucous 

 patches, ulcers, particularly of throat) 

 lesions. 



Tetanus (Lock-jaw). 



(a) Cause: Bacillus tetani; forms spores. 



(b) Localized : Subcutaneous or sub-mucous tissues ; 



usually former; umbilical cord of new- 

 born. 



(c) Entry : Wounds, often of trifling nature ; also in 



wounds where much tearing of tissue 

 has occurred, especially if soiled with 

 earth; compound fractures. 



(d) Exit: In discharges from wound only. 



(e) Contracted : Gun-shot or cannon-cracker wounds ; 



contusions in which powder, earth or other 

 foreign bodies driven into tissues; punc- 

 tured wounds of hands or feet, e.g., by 

 nail. 



(f) Disinfection: As forms spores, prolonged boiling 



or contact with powerful disinfectants 

 necessary, tricresol or lysol 2 per cent solu- 

 tion, two hours; bichloride of mercury 

 1-500, two hours. Use solutions hot. 

 Only discharges from wound, and soiled 



