The Campaign in Havana 233 



based upon the theory of mosqtiito transmission, 

 the following facts were known concerning the 

 method of the transmission of this disease, and 

 concerning the transmitting agent, the Stegomyia 

 {Aedes) calopus, then known as Culex fasciaius 

 (Fabricius) : 

 The Army Medical Board had proven: 



1. That yellow fever is capable of being trans- 

 mitted by the female of the mosquito now known 

 as the Aedes (Stegomyia) calopus. 



2. That this mosquito must have previously 

 fed on the blood of an individual sick with 

 yellow fever, within the first three days of the 

 disease. 



3. That an interval of twelve days or more, 

 after feeding on a yellow fever patient, is necessary 

 before the infected mosquito is capable of convey- 

 ing the infection. 



4. That yellow fever can be produced by the 

 subcutaneous injection of the blood of a yellow 

 fever patient, taken in the first and second days 

 of the disease.. 



5. That the period of incubation of the disease 

 is between forty-one hours and five days and 

 seventeen hours. 



6. That "fomites" cannot convey the disease. 



7. That the Stegomyia fasciata (Stegomyia 



