Investigations Concerning Aerosol Immunization of Swine Against Diamond Disease,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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As a result of the authors experiments, he concludes that 1 Aerosol immunization of swine against diamond disease by the use of live attenuated cultures of the A70 and VR2 strain under experimental conditions appears to be a safe procedure both for young swine approximately 35 kg as well as older approximately 70 kg 2 A special resistance is gained, fully protecting 37 of 39 immunized swine from exposure to a powerful intradermal infection carried out 21, 40, and 108 days after immunization 3 In determining the degree of immunity, the method of artificial infection the challenge method seems more conclusive than examining the sera by the growth-test method and 4 A better explanation of the causes of the obvious discrepancies between results obtained by the growth-test and artificial intradermal infection challenge methods appears advisable for both purely scientific reasons as well as possible practical application.
- Animal Husbandry and Veterinary Medicine