262 INFECTION AND IMMUNITY 



conveyed by fomites, such as bedding, clothing, effects, and 

 baggage, they need not be subjected to any special disinfection. 

 Care should be taken, however, not to remove them from the 

 infected rooms until after formaldehyd fumigation, so that they 

 may not harbour infected mosquitoes. 



" Medical officers taking care of yellow-fever patients need not 

 be isolated; they can attend other patients and associate with 

 non-immunes with perfect safety to the garrison. Nurses and 

 attendants taking care of yellow-fever patients shall remain 

 isolated, so as to avoid any possible danger of their conveying 

 mosquitoes from patients to non-immunes. 



" 4. The infection of mosquitoes is most likely to occur during 

 the first two or three days of the disease. Ambulant cases, that 

 is, patients not ill enough to take to their beds and remaining 

 unsuspected and unprotected, are probably those most responsi- 

 ble for the spread of the disease. It is therefore essential that 

 all fever cases should be at once isolated and so protected that 

 no mosquitoes can possibly get access to them until the nature of 

 the fever is positively determined. 



" Each post shall have a ' reception ward ' for the admission 

 of all fever cases and an 'isolation ward ' for the treatment of 

 cases which prove to be yellow fever. Each ward shall be made 

 mosquito-proof by wire netting over doors and windows, a ceil- 

 ing of wire netting at a height of seven feet above the floor, and 

 mosquito-bars over the beds. There should be no place in it 

 where mosquitoes can seek refuge, not readily accessible to the 

 nurse. Both wards can be in the same building, provided they 

 are separated by a mosquito-tight partition. 



" 5. All persons coming from an infected locality to a post shall 

 be kept under careful observation until the completion of five 

 days from the time of possible infection, either in a special de- 

 tention camp or in their own quarters; in either case their tem- 

 perature should be taken twice a day during this period of 

 observation, so that those who develop yellow fever may be 

 placed under treatment at the very inception of the disease. 



" 6. Malarial fever, like yellow fever, is communicated by mos- 

 quito bites and therefore is just as much of an infectious 



