258 DISEASES OF CATTLE. 



the question remains whether the man who denied sickness iu the cows 

 to begin with, and adduced professional evidence of this, did not later 

 acknowledge the foot-and-mouth disease as a blind to hide the real 

 source of the trouble in scarlatina in his own family or the family of 

 au employe. Dr. Stickler's corroborative proof from, the three children 

 inoculated with imported virus of foot-and-mouth disease is equally in- 

 conclusive, as the results were certainly not those of the foot-and-mouth 

 disease as it appears in man, and the fact that the children did not con- 

 tract scarlatina when exposed to it later proves only that they were at 

 the time naturally insusceptible, or that Dr. Stickler had in some way 

 infected his virus or the lancet used to insert it. so as to give them 

 scarlatina. Certain it is that foot-and-mouth disease does not produce 

 scarlet fever in man, and that scarlet fever so constantly prevalent on 

 the American continent does not produce foot-and-mouth disease, from 

 which this continent is happily free. Foot-and-mouth disease does, 

 however, produce in man an eruption of blisters on the mouth and 

 lingers and other symptoms which Dr. Stickler's cases failed to show. 

 Whether the swollen glands of the neck in the one case and the sore 

 throat in the other resulted from scarlatinal germs introduced from 

 another source, or whether these were merely the result of septic inoc- 

 ulation with the impure and overkept matter imported from England, 

 does not appear. We are left, therefore, without positive proof of the 

 existence of scarlatina in the cow. That the milk may be contaminated, 

 however, after leaving the cow is certain, and it has been suggested 

 that on the open sore of the cow a scarlatina germ may be temporarily 

 grafted, which, though harmless to the cow, may escape into the pail 

 during milking and infect the person using the milk. Too great care 

 can not be exercised in keeping the infection of scarlet fever apart from 

 dairy cows or their milk products. 



Among other contagious forms of maminitis I may name one which 

 I have encountered in large dairies, starting as a sore and slight swell- 

 ing at the opening of the teat and extending up along the milk duct 

 to the gland structure in the bag, all of which become indurated, nodu- 

 lar, and painful. The milk is entirely suppressed in that quarter of the 

 bag, and from that it may extend to the others as it does from cow to 

 cow through the milker's hands. 



Another form almost universally prevalent iu this district of central 

 New York in 1889 broke out over the teats and udder as blisters 

 strongly resembling cow-pox, but which were not propagated when 

 inoculated on calves. It was only exceptionally that this extended 

 through the teat to the gland tissue, yet in some instances the bag was 

 lost from this cause. Scarlatina in man was very prevalent at the 

 time (many schools were closed in consequence), but no definite con- 

 nection seemed to exist between this and the cow disease, and on dif- 

 ferent dairy farms there were families of young children that had never 

 had scarlet fever and who did not at that time contract it. 



