Bacterins and Drugs for the Control of Experimental Fowl Cholera

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Abstract
One beta-propiolactone-inactivated bacterin and 2 formalin-inactivated bacterins were pre-pared and used to immunize 3 groups of birds. Challenge results in-dicated that the birds were immune for as long as 5 months after vaccination. At the time the vaccinated birds were challenged, unvaccinated chickens were given comparable doses and used to test efficacy of 4 different drugs. "Win" (Sterling no. 5063) given 1 g/40 lb feed and oxytetracycline 25 mg subc. given at the time of challenge protected chickens against a challenge that killed 100% of controls. Erythro-mycin was more effective subcutaneously than when given in the drinking water. Furacin in the drinking water was effective in one trial but not in another.

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