BACTERIOLOGY IN A NUTSHELL. 



Experiment of 

 Carroll. 



Death of 

 Lazear. 



Preventive 

 Measures. 



tell US that on August 27, 1900, Carroll allowed 

 himself to be bitten by stegomyia fasciata that 

 twelve days before (on the second day of the 

 disease) had bitten a typical case of yellow 

 fever. After an incubation period of three days, 

 Carroll developed a very severe form of the 

 disease. He made an uneventful recovery. 

 Lazear also allowed himself to be bitten by the 

 same species of mosquito, but was not so 

 fortunate as his co-worker, Carroll. Lazear died 

 in a hospital at Washington, D. C, from the 

 effects of yellow fever; a martyr to scientific 

 research. 



In the Southern States and in Mexico, where 

 epidemics of yellow fever occur every year, 

 physicians surround the beds of patients sus- 

 pected to be developing the disease with a net- 

 ting to prevent the onslaughts of the mos- 

 quitoes. Dr. Walter Wyman, surgeon of the 

 U. S. Marine Hospital, in speaking of the 

 disease in Texas and in Mexico, says that it is 

 necessary to screen the beds of "suspects" be- 

 cause it is not possible to tell until the fifth 

 day whether or not the disease is the "dread 

 yellow variety" which is communicable only 

 "during the first three days." Strenuous 

 efforts are being made by the health officers in 

 all parts of Texas and Mexico to exterminate 

 the pestilence-breeding and disease-carrying 

 mosquitoes. Water barrels, which are much 

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