[Reaction to tuberculin in cows and immune response to tuberculosis pathogen antigens in cattle-breeders].

Reactions to tuberculin in cows from a healthy herd were ascertained to be caused by Mycobacterium tuberculosis as latent tuberculous infection was detected in 10.4% of cattle-breeders, including milkmaids looking after infected cows and having a family contact with patients with open-type tuberculosis. In tuberculin-positive cows, the level of antibodies to M.

[Investigation of the thermal resistance of Mycobacteria tuberculosis].

Incubation by means of the growth-promoting factor VCG of autoclaved culture broth of M. bovis 8 and tuberculins on the nutrient medium VCG gave rise to microorganisms that could partially restore acid resistance. The isolates reacted with antiserum to M.