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. 1978 Sep 1;19(3):430–440. doi: 10.1186/BF03547612

Experimental Infection with Mycobacterium Avium, Serotype 2, in Pigs

5. The Immunizing Effect of BCG Vaccine Against M. Avium Infection

Infektionsforsøg på svin med Mycobacterium avium, Serotype 2, 5. BCG vaccinens beskyttende effekt mod M. avium infektion

J Berg Jørgensen 111,211,✉
PMCID: PMC8366346  PMID: 364966

Abstract

The immunizing effect of BCG vaccination against infection with M. avium was evaluated in pigs on the basis of clinical and pathological findings and numbers of acid-fast organisms in the tissues.

In experiments with small and large challenge doses i.v. (10−2 and 5 mg) the vaccinated animals were found to be partially protected. As compared to non-vaccinates, a reduction of viable organisms was found in vaccinates examined 28-31 or 70-73 days after challenge (Table 4), and fewer positive tissues were found in vaccinates than in non-vaccinates (Table 3). The most obvious results were seen in the experiment with a challenge dose of 10−2 mg i.V., where the number of organisms was consistently smaller in vaccinates than in non-vaccinates (Table 4). In contact infection experiments, the observations in both vaccinated and non-vaccinated pigs were limited and the results difficult to evaluate. There seemed to be a protection, as judged by histopathological and cultural findings. kw|Keywords|k]Mycobacterium avium, Serotype 2; k]BCG vaccination; k]challenge, intravenous, oral; k]pigs

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Acknowledgments

The author is indebted to M. Weis Bentzon, the Department of Biostatistics, Statens Seruminstitut, for making the statistical evaluations.

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