CARRIAGE OF DISEASE 
127 
used for making the plates on gelatin and special media. 
B. typhosus was recovered from the flies twenty-three 
days after they had been infected. 
“Buchanan (1907) allowed M. domestica to walk 
over the surface of a Petri dish smeared with typhoid 
dejections. The flies (number?) were immediately 
afterwards allowed to walk over the surface of media 
in Petri dishes. Naturally, some plates became in¬ 
fected. 
“The evidence regarding the part that flies may play 
in the spread of typhoid fever may therefore be ac¬ 
cepted as quite conclusive. ” 
In addition to the experiments by Nuttall and Jep- 
son given above should be mentioned the experiments 
recorded by Major N. Faichnie (1909). Major Faichnie 
states that he was recently sent to investigate a small 
outbreak of enteric fever at Kamptee, where he was 
obliged to suspect flies, after excluding all other causes. 
Flies were not over-numerous, but twelve from the 
artillery lines were mashed up in sterile salt solution, 
and Bacillus typhosus was separated. Twelve flies from 
the infantry kitchen were then captured. Each was 
transfixed with a sterile needle, passed two or three 
times through a flame until the legs and wings were 
scorched, and was then put in a normal salt solution 
and stirred. After this they were mashed up and B. 
typhosus was found. Before mashing it was not found. 
The demonstration that the bacillus was present in the 
intestines was therefore good. His conclusions are 
that while experience seems to show that infection con- 
