CARRIAGE OF DISEASE 137 
by flies from such material when left exposed in a 
latrine pan. 
Another experiment, with a woolen blanket smeared 
with a fresh sample of feces from a carrier and doubled 
so that the smear was outside, gave the result that the 
bacillus was recovered at every examination up to and 
including the fortieth day. In this experiment the 
sample used was a liquid stool, the result of a saline 
aperient, and portions of the blanket fiber were 
pulled out from the soiled portion and used for the 
experiment. 
The latest contribution to the subject at this time 
of writing is Dr. J. C. G. Ledingham’s report (1910). 
In an introduction to this report, Dr. Theodore Wilson 
states that the difficulty of dealing with carriers is very 
great indeed, since they may harbor the infection for 
long periods and it is extremely difficult to free them 
from it. It is most important, however, that all possi¬ 
ble efforts should be made to detect carriers and to 
endeavor to secure on their part those precautions of 
strict personal cleanliness and of disposal of dejecta 
which will minimize the risk of infecting other peo¬ 
ple. Furthermore, Doctor Thompson points out that 
it is equally important that an attempt should be 
made to prevent such carriers from taking any part 
in the milk trade or in the preparation or handling 
of food. 
An excellent review of Dr. Ledingham’s report by 
Dr. R. M. Grimm will be found in Public Health Re¬ 
ports xxvi, No. 4, March 17, 1911. 
