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  • Title: Tuberculin sensitivity of cattle inoculated with atypical mycobacteria isolated from cattle, feral pigs and trought water.
    Author: Pearson CW, Corner LA, Lepper AW.
    Journal: Aust Vet J; 1977 Feb; 53(2):67-71. PubMed ID: 857792.
    Abstract:
    Each of 12 cattle was inoculated either subcutaneously and intradermally or into a mesenteric lymph node with 1 of 8 species of liver atypical mycobacteria isolated from cattle, cattle trough water and feral pigs. Seventy-eight days after inoculation the cattle were tuberculin tested with bovine PPD, avian PPD and homologous heat-concentrated syntheic medium tuberculins. They were killed 85 days after inoculation. Organisms were cultured from caseous granulomas at all sites in cattle inoculated with M. avium serotype 2. M. simiae was recovered from a granuloma at the subcutaneous site. Acid-fast bacilli were isolated from the mesenteric lymph node inoculated with trough water organisms. At 72 h, all the cattle had produced skin reactions of 4 mm or more to the homologous tuberculins and all except 1 produced a similar response to avian PPD. Only isolates of bovine origin sensitised cattle to bovine PPD to this degree, and these reactions were less than the corresponding response to avian PPD.
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