204 INFECTIOUS AND PARASITIC DISEASES. 



gus, rectum, and probably blood ; is general 

 infection. 



(c) Entry: Probably through respiratory tract; 



may also enter through abrasions, as the 

 former practice of variolation proves. 



(d) Exit: Exhalations from lungs and skin, partic- 



ularly in the dried scales of the latter; 

 in all secretions and excretions, therefore 

 in sputum, urine, feces, tears, pustules, etc. 



(e) Contracted: Highly contagious; virus is in air 



surrounding patient, being thrown off with 

 breath and wafted from eruption; is con- 

 veyed by persons and f omites ; may also be 

 conveyed by flies . 



(f) Disinfection: Disinfect everything which has 



been in contact with patient; also en- 

 tire room and contents. Screen windows 

 from flies, and kill all vermin; wipe all 

 surfaces of room daily with bichloride 

 of mercury (i-iooo); linens, etc., boil, 

 steam, or immerse in tricresol (2 per cent), 

 formalin (5 per cent), carbolic acid (5 per 

 cent) ; anoint patient with carbolated vase- 

 lin; all abscesses and ulcers should be 

 regarded as infectious until healed; fumi- 

 gate after recovery with sulphur or for- 

 maldehyde. 



(g) Prophylaxis: Vaccination of every one during 



