DISEASES AND TREATMENT. 
G57 
abortion has just gained a foothold the animals may abort much 
earlier than in those herds where the disease has existed for con¬ 
siderable time. On account of the slow immunity the animal 
gradually gains, she finally carries the fetus full time and may 
cease aborting. However, the length of immunity is an im¬ 
portant factor for future research to determine. It has been 
observed that an aborting cow after losing two or three foeti 
finally deliver two or more full term, and which live, and this 
same cow later again aborts. Heifers usually abort earlier than 
cows. 
Some work has been done in regards to securing a proper 
vaccine to combat the disease. This has been variously prepared 
and variously used and has met with various results. It appears 
that this germ does not give off as virulent a toxic substance as 
does the Bacillus necrophorus. This being the case, if we are 
to succeed, it will be with large and repeated doses. 
Necrobacillosis —This disease is of considerable economic im¬ 
portance in this great Middle West and particularly in the inter¬ 
mountain region. 
Necrobacillosis in the Horse —It has been announced by 
some investigators that they have found the Bacillus necrophorus 
a causative factor in summer sores or bursatti. The subject of 
bursatti appears far from settled, as while this is the apparent 
cause in one part of the country or world, in still others necrosing 
skin lesions called by this same name in some cases are pro¬ 
nounced as due to a filaria or worm, minute in size, in others ap¬ 
parently a fungus and so on. Sloughing hoofs are sometimes 
caused by the Bacillus necrophorus. 
Recently a chronic case of grease heel was presented in Dr. 
Kingman’s clinic at the Colorado Agricultural College. The case 
was one of some two years standing. Both hind legs were swollen 
nearly to the hocks and presented the appearance of chronic 
grease heel. Dermatitis, skin thrown up in folds,from which a 
grease-like substance with offensive odor exuded. The writer 
observing the case considered the odor as that simulating necro¬ 
bacillosis and accordingly made a smear and stained with Loffler’s 
