2 j70 DISEASES OF THE DOMESTIC ANIMALS 



erally most satisfactory. Infection may last for six months or more 

 about infected premises or objects, and for as many weeks about 

 sheep recovered from variola. Dipping the latter in 2 per cent, 

 creolin or lysol will, however, destroy the infection. Ovination or 

 inoculation of sheep with the virus of sheep-pox has been done 

 with greatly varying mortality (2-20 per cent.). It is said that 

 inoculation from an inoculated sheep, by means of the virus from 

 the pustule taken at the tenth day and introduced into the end of the 

 tail of a healthy sheep, will produce immunity without eruption; 

 also that ordinary vaccination will protect. No inoculations should 

 be practiced until an outbreak has occurred in a flock, as the disease 

 may be spread by the process. 



Medical treatment includes cleanliness of surroundings and 

 bedding; warm shelter; fresh air, and sloppy, nourishing food. 

 The nostrils and eyes must be kept cleansed with saturated boric 

 solution, and chalk may be used in the water if there is diarrhea. 



In the case of cow-pox, the patients should be isolated and a 

 separate attendant provided. The use of a milking tube, frequent 

 hot fomentations, and measures advised under mastitis are indi- 

 cated when the udder is affected. In horse-pox, cleanliness, clip- 

 ping hair from the parts, and bathing with hot 2 per cent, lysol 

 solution, the application of wet compresses of the same or other 

 antiseptic, and later of carbolized vaseline, are of service. Vaccine 

 lymph is made by inoculating calves about five months old with gly- 

 cerinated vaccine lymph by rubbing it in over shaved and scarified 

 areas on the sides and flank. 



After five to eight days the crusts are cleansed and removed and 

 the lymph scraped off and squeezed out of the vesicles and mixed 

 with. an equal part of glycerin. After two months the preparation is 

 sterile and suitable for vaccination purposes. 



Vertigo — Megrims — Blind Staggers. 



This is a nervous disorder which occurs most often in horses ; 



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