350 YETEKINART STATE BOARD 



halters, cars, boats, etc., as well as the clothing and the surface of 

 the bodies of all attendants and animals, should be required in every 

 case of an importation from an infected country. Such animals 

 should be held in quarantine for two weeks. 



Describe the Bang method of eradicating tuberculosis from a herd of 

 cattle. 



Slaughter all clinical cases. Apply the tuberculin test to the 

 remainder of the herd. Those reacting to the test but showing no 

 clinical symptoms are removed to a separate stable. (Perhaps it 

 would be better to remove the healthy animals to new or non-infected 

 quarters and leave the reactors in the old stable, which, in either 

 case, should be thoroughly disinfected.) Promptly remove the off- 

 spring of reactors from the mother and feed them on milk from 

 healthy cows or on sterilized milk of the mother. The non-reacting 

 animals and all offspring should be tuberculin tested every six 

 months and any reacting animals promptly removed and their 

 stalls disinfected. Every avenue of infection of the sound herd 

 must be guarded. Thus a healthy herd may be built up from a 

 diseased one. 



Define disinfection. Name two natural and five chemical disinfectants. 



Disinfection is the act of destroying microorganisms in or on 

 any substance, or inhibiting their growth and vital activity. 



Sunlight and heat are two natural disinfectants. 



Phenol, corrosive sublimate, chloride of lime, formaldehyde, and 

 oxalic acid are chemical disinfectants. 



What precautions should be taken in feeding a horse that is kept from 

 work two or three days on account of lameness or injury? 

 Why? If such precautions are not observed, what is likely 

 to occur? 



The amount of food should be greatly lessened and a laxative 

 diet would be advisable, because the vital activities are lessened and 

 less nourishment is required. Azoturia may follow rest and heavy 

 feeding in plethoric horses. 



What factors do you consider important in the prevention of contagious 

 and zymotic diseases? 

 Isolation, quarantine, disinfection, and protective inoculations. 



Name five prophylactic serums or vaccines and the disease against 

 which each is employed. 

 Hog-cholera serum protects against hog cholera. 

 Tetanus antitoxin protects against tetanus. 



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