COMMISSIONER OF AGRICULTURE 291 



Fried berger and Frohmer quote cases of infection through 

 virulent buttermilk. 



It follows that other milk products prepared at moderate tem- 

 perature, whey, komuyss, and probably milk powder, trucream, 

 etc., should be looked upon with suspicion. 



Edelmann furnishes instances in which persons contracted the 

 disease by walking barefoot over the manure and soiled litter of 

 the sick animals. 



One cannot omit the cases of infection through vaccination. 

 This is a decidedly' rare channel of infection, yet a number of 

 instances have come under observation at different times. 

 Arthand reported 3 cases in 1000; Vaight, 3 cases in 500,000 

 vaccinations. . The cases occurring at Boston in 1902 from the 

 use on a calf of contaminated vaccine is another instance of this 

 danger. It is interesting in this connection to note the statement 

 of Bossi that foot and mouth disease was inoculated on children in 

 1809 by using the product of an eruption on a cow's udder which 

 had been mistaken for cowpox, and, on the other hand, that of 

 Siegel in which lymph from the blebs on the mouth of a cow failed 

 to infect. Enough is known to establish the fact that the disease 

 may easily be transferred to man through the use of impure vac- 

 cine. Cowpox is, like foot and mouth disease, an acute eruptive 

 fever localizing its lesions on the skin; the period of incubation 

 in the two diseases is nearly the same; the duration of both dis- 

 eases and the perfect recovery ensuing from the fifteenth to the 

 twentieth day agree; both have a mild and transient fever subsid- 

 ing when the local eruption appears ; both have large vesicles 

 which, in spite of their inherent differences, may be confounded. 

 When inserted together, therefore, they mature at the same time 

 and the germs of both diseases in a state of the fullest potency may 

 be taken from the vesicles at the same moment. 



The question may arise as to the possibility of the infection 

 of man through eating underdone meat. This has been denied 

 by Ostertag and others, but in the face of the experiments of 

 Bassienus and Siegel it is quite certain that, at the height of the 

 attack, the blood ami therefore every organ in which the blood 

 circulates is more or less infecting. The immunity of the meat- 



