Miscellaneous Diseases. 163 



The disease is marked by the appearance of blisters on 

 the lips, gums, tongue, and inside of the cheeks. One or 

 more feet may be diseased. Blisters appear on the coro- 

 net and between the hoofs and often on the teats. Re- 

 covery is usual except in very young animals. 



One important phase of the disease is that the organ- 

 isms, whose nature is unknown, are often present in the 

 milk. People using such milk in a raw form are thereby 

 infected. The disease in man presents much the same 

 symptoms as in the cow. Hogs also acquire the disease 

 from milk. 



Distemper in horses. Influenza, or as it is frequently 

 called distemper or pink eye, is a contagious disease, the 

 cause of which is unknown. Infection takes place from 

 horse to horse. The virus can be carried by infected 

 human beings, litter and harness, etc. The period of in- 

 cubation is two to seven days. The disease appears 

 quickly. It is marked by a loss of appetite, a fever of 

 3 to 4 F. above normal, persisting for three to six days. 

 The animal is dull; at first it is constipated; the feces 

 are in hard balls, covered with slimy matter, later diar- 

 rhea is present. The eyes are inflamed. The disease 

 lasts six to ten days. From 2 to 4 per cent of the af- 

 flicted animals die. 



Distemper in dogs. Distemper is the most important 

 disease of dogs. The cause is not known; the period of 

 incubation is four to six days. The eyes are inflamed, 

 the exudate dries and often causes the lids to adhere to 

 each other. Constipation at first, is followed by diar- 

 rhea in which the feces have an offensive odor, and are 

 often slimy and frothy. There is a nasal discharge. It 



