HOG CHOLERA.* 
By C. D. McGilvray, M.D.V., Winnipeg, Man. 
This serious affection of swine has fortunately only made its 
appearance on rare occasions in Manitoba. Dunbar reported an 
outbreak which occurred at Kildonan during 1886 and Stevenson 
an outbreak near Carman in 1899. Since the latter time it has not 
made its appearance here until August, 1911, when it was re¬ 
ported to be in existence among pigs on premises near Winnipeg. 
Upon investigation it was found that the outbreak was of a 
rather serious nature and existed on premises and in districts 
where a large number of swine were being kept. 
Efforts were therefore immediately directed towards control¬ 
ling and eradicating the disease from the districts in which it 
existed and at the same time to ascertain and determine the source 
of infection. 
Searching enquiry failed to bring forth any evidence or in¬ 
formation as to the infection having been introduced by fresh 
hogs brought into the district and no fresh hogs had for some con¬ 
siderable time prior to the detection of the outbreak been intro¬ 
duced onto any of the premises on which the disease first mani¬ 
fested itself. A curious and striking feature was that on all of 
the premises where the disease first manifested itself, the hogs 
thereon were being fed uncooked swill, kitchen refuse and garbage 
obtained from hotels in the city of Winnipeg, while on other 
premises in the same district, where they were not feeding such 
refuse and garbage, the hogs remained healthy and the disease did 
not manifest itself until a much later date and after ample time 
had elapsed for them to become affected either by direct or in¬ 
direct contact or intermediary means from the premises where the 
disease already existed, and in such cases information was ob¬ 
tainable that the infection had been introduced by such means. 
* Presented to the Veterinary Medical Association of Manitoba, Brandon, March, 1912. 
444 
