CONTAGIOUS BLOOD DISEASES. 



453 



the saliva and blood, but not in the milk. Nearly all animals bitten by 

 a rabid dog, are attacked Avith the disease in the course of time, but man 

 seems to possess a partial immunity ; only a small percentage of the 

 men bitten by rabid animals have rabies. 



Incubation.— The period of incubation varies in different animals. The 

 horse goes fifteen to ninety days, usually 

 thirty ; cattle, twenty to thirty days ; 

 sheep, twenty to seventy-four days ; swine, 

 hventy to forty-nine days. In man the 

 period of incubation varies from a few 

 days to a few months, though some cases 

 develop after a year or so, or even longer, 

 the rabies at last being more the effect of 

 fear and long continued anxiety and worry 

 over the possible effects of a bite, than of 

 the bite itself. 



How to know it. — The horse becomes 

 frantic with fever and pain ; delirium sets in early ; he neighs, paws, 

 bites his manger, clothing, etc. ; is ravenous for water but swallows with 

 difficulty ; he grows worse till death takes place by paralysis. 



COUNTENANCE OF A HORSE WITH 

 KABIES. 



IRREGULAR STRANGLES. 



What to do. — No treatment is of any avail ; if there were anything that 

 could be given, it would be too risky to attempt it; but so far, science 

 has discovered nothing to prevent a fatal termination. As soon as a case 

 is suspected isolate the horse, tie him so that he shall be powerless for 

 harm, and await developments. As soon as it is satisfactorily recognized 

 destroy him. 



