128 TRINIDAD AND TOBAGO BULLETIN. [XIX. 3. 



-circular nd raised above the membrane. They are about the size of a 

 three-pt.. ■ piece and their centres are soft and often yellow or black 

 in colour. 



Treatment —Isolation of affected animals and slaughterinj^. In the 

 United Kingdom splendid results are obtained by treatment with Anti- 

 Hog Cholera Serum and then allowing animals so treated to mix with 

 affected animals. They obtain a life long immunity in this way. 



Cow Pox. 

 Definition — A virulent disease transmissible by accidental or inten- 

 tional inoculation. The natVire of the microbic agent which produces 

 the disease is still unknown. 



Animals affected — Bovine. It can be conveyed both to man and 

 ■other domesticated animals. 



Sijmptoms — Pustular eruptions usually appear on the udder in 

 the case of cows and on the muzzle, nose and lips in the case of calves. 

 In exceptional cases the pustules become generalised. The disease 

 usually commences after an incubation period of 4-7 days with slight 

 fever, diminished appetite, irregular rumination and weakness. During 

 milking it is noted that the udder is sensitive, the milk is thinner and 

 of a lower specific gravity. These pustules start as hard nodules 

 about the size of peas and change in 2 to 3 days into vesicles filled 

 with clear lymph. Towards the 7th and 8th day they become ripe, the 

 contents of the vesicles become purulent and dry to scabs. 



Treatment — No curative treatment can be laid down, the development 

 of the disease being perfectly regular and tending to recovery. Simple 

 hygienic precautions and cleanliness are sufficient to avoid complications 

 due to suppuration. 



Eabies. 



Definition — An inoculable disease caused by a still undiscovered 

 .agent. 



Animals infected — All animals including human beings may suffer 

 from rabies, provided the virus is inoculated : it is chiefly by the dog 

 that the disease is spread. In man the disease is known as Hydrophobia. 



Sym2)toms — A change in the habits of the dog is first noticed ; he 

 hides in dark corners, snaps at persons, other animals and inanimate 

 objects. A dog will wander away from home and run miles along a road ; 

 as a rule foaming' from the mouth is marked and the animal will swallow 

 pieces of stone, metal, wood, &c. Later on paralysis sets in, and the 

 lower jaw is first affected, bat in time it may become generalised. 

 The saliva contains the virus and it has been proved that saliva is 

 virulent three days before the animal shows symptoms of the disease. 



Post mortem— There is congestion along various parts of the 

 -alimentary canal. The stomach may contain bits of wood, wire, stone 

 ^nd pieces of cloth if the animal is killed early, but as a rule the stomach 

 is empty except for a variable quantity of blood stained mucus. 



