244 The Control of Mosquitoes 



well-equipped hospital, where the members receive 

 medical and hospital treatment without extra 

 cost above the annual dues. Because of this 

 custom, the hospitals in Havana receive most of 

 the sick Spaniards, and the detection of yellow 

 fever cases was greatly facilitated. All American 

 "yellow fever suspects," as well as yellow fever 

 patients, were sent to Las Animas Hospital, then 

 under the direction of the chief sanitary officer, 

 and as a rule such cases were reported in the 

 earlier stages. All cases were advised to take 

 hospital treatment, and most of them did so. 

 When a patient preferred to remain at his resi- 

 dence, it was allowed ; his room was screened, and 

 the screen door was kept locked and continuously 

 guarded. Only persons authorized by the chief 

 sanitary officer could enter. Non-immunes were 

 not allowed in the patient's rooms under any 

 circumstances. As soon as a "yellow fever sus- 

 pect" was reported, he was conveyed to the hospi- 

 tal, or put in a screened room. Next, the history 

 of his recent visits was traced, recorded, and 

 verified as thoroughly as possible, in order to 

 determine the source of his infection. Then 

 his house and the adjacent houses were fumi- 

 gated. When the patient preferred treatment at 

 home, his room was not fumigated until he re- 



