[The effect of qualitatively different nutritional intakes on the development of experimentally induced atypical mycobacteriosis and the appearance of indicators in pigs].

A single infection with the culture of M. intracellulare at a rate of 0.1 mg per kg of weight in pigs fed the A 1 and SOL mixtures and the subsequent development of clinically confirmed mycobacteriosis did not exert any significant influence on the performance of the animals, as compared with the non-infected animals. The metabolically determined coefficients of nutrient digestibility in the SOL mixture determined in the animals on the 70th and 91st days from infection were almost the same as those in non-infected animals. The absence of animal protein and biofactor supplement in experimental mixtures adversely affected the performance of the pigs but exerted no unfavourable influence on the development of atypical mycobacteriosis after the administration of 0.01 mg or 0.1 mg of the culture of M. intracellulare per kg of body weight. No elimination of atypical mycobacteria in the faeces was demonstrated in the groups fed mixtures with biofactor supplement. The feeding of infected pigs with the COS 2 and A 1 mixtures, compared with the use of the experimental mixtures with a lower content of nitrogen compounds and vitamins and a higher content of fibre and energy, influenced the parameters of performance but did not result in a different patho-anatomic and bacteriological picture after mass-scale infection (1 milligram of culture per kg of weight).