First Sanitary Work 287 



the adjacent rooms and houses having already 

 been so treated. 



No non-immunes were allowed in the patient's 

 room. His physician, nurse, and possibly one or 

 more immtme friends, with the approval of the 

 chief sanitary officer, were allowed to enter the 

 screened room. No one could pass the guard 

 without written authority. 



In Ancon Hospital two wards and several pri- 

 vate rooms were used solely for yellow fever sus- 

 pects. To enter the wards it was necessary to 

 pass through a vestibule provided with three 

 screened doors. A pan of pyrethrum powder 

 was kept burning constantly between the last 

 two doors, and a guard was always present to see 

 that the doors were opened and closed rapidly. 

 The nurses and physicians learned to pass through 

 the doors quickly and inspected the wards daily 

 for Aedes calopus. The windows were screened 

 on both the inside and outside and examined 

 twice daily for defects. The buildings and the 

 grounds in the vicinity of the hospital were fre- 

 quently inspected for possible water containers. 



All of the nurses and many of the physicians 

 were non-immunes, but no case of yellow fever 

 developed among those caring for the patients and 

 living in the hospital grotmds, although at times 



