2,72 DISEASES OE UNCERTAIN .ETIOLOGY 



person for the rest of its days, and may also hand down the virus to 

 the first and second generation, these latter spreading the disease 

 fourteen days after becoming adults. 



An infected ship should be ancliored a quarter of a mile from the 

 shore or other ships as the fly is not likely to cross this distance. 



The quarantine should be five to seven days because the incubation 

 is up to seven days. 



Place the sick in mosquito-proof rooms, mesh twenty strands to. 

 one inch, and tjuarantine the remainder of the crew or members of the 

 household. 



Disinfect the ship by a Clayton's disinfector. 



A.S the flies are cjuiet between 9 a.m. and 3 p.m. visits can then be 

 made without risk. 



Houses should be fumigated by sulphur dioxide or pyrethrum 

 powder, burnt in the proportion of 2 lbs. to 1,000 cubic feet of space. 



The breeding places of the flies should be destroyed. 



BOYCE'S SUMMARY. 



(A) When the fever is endemic : — 

 (i) Segregation of non-immunes. 



(2) Screening of bed, verandah, or, if possible, the house- 

 completely. 



(3) Systematic mosquito destruction by : — 



Removal of breeding places. 



Screening of water cisterns. 



Oiling of waters not screened or drained. 



The infliction of fines for non-observance of sanitary 



rules. 



Drainage and bush cleaning. 



(4) Education. 



(5) Quarantine administration. 



(B) When vellow fever has already broken out : — 



(i) Removal of non-immunes from the infected area and 

 deflection of the trafific from this area. 



(2) Isolation of all cases, sure and suspected. 



(3) Provision for isolation of contacts. 



(4) Early notification. 



(5) Fumigation. 



(6) Emergency mosquito measures : — 



Removal of receptacles, oiling, screening, and draining- 



(7) Education by lectures, meetings and pamphlets. 



(8) General organization of the medical forces. 



