212 INFECTIOUS AND PARASITIC DISEASES. 



each time of using. Syringes and rectal tubes must be 

 isolated and the latter boiled after using. Tubs should 

 be scrubbed daily and soaked in carbolic as the linen 

 is. Hands must be scrubbed and disinfected after giv- 

 ing tubs or working over typhoid fever patients. 

 Blankets, mattresses, and pillows must be sterilized 

 after use, in the steam sterilizer." 



Whooping-cough (Pertussis). 



(a) Cause: Unknown. 



(b) Localization: Respiratory tract. 



(c) Entry: Nose and mouth through air. 



(d) Exit: Secretions from nose and mouth. 



(e) Contracted: From the sick, or from room, hand- 



kerchief, etc., infected by same. 



(f) Disinfection: As cause not known, no data. 



However, boiling water or steam, and the 

 usual strengths of the chemical disinfec- 

 tants are recommended. Fumigate with 

 sulphur or formaldehyde. 



Yellow Fever. 



(a) Cause : Not known ; mosquito {stegomyia fasciata) 



known to carry the virus. 



(b) Localization: Blood. 



(c) Entry: Bites of stegomyia mosquitoes. 



(d) Exit: Through bites of mosquitoes. 



(e) Contracted : Only by being bitten by infected mos- 



quitoes. 



