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. 1975 Mar;36(3):255-7.

Age of cattle as related to resistance to infection with Mycobacterium paratuberculosis

A B Larsen, R S Merkal, R C Cutlip
  • PMID: 1115424
Free article

Age of cattle as related to resistance to infection with Mycobacterium paratuberculosis

A B Larsen et al. Am J Vet Res. 1975 Mar.
Free article

Abstract

Two 1-month-old calves, four 9-month old calves, and 4 adult (5 to 11 years old) cattle were exposed to Mycobacterium paratuberculosis. At 150 days after exposure, all cattle were killed and necropsied, and at that time, tissues of the 1-month-old calves had more bacilli and lesions than did tissues of the 9-month-old calves or the adult cattle. All cattle responded to immunologic tests during the experiment.

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