[The effect of the cultivation conditions on the properties of bacilli comprising the basis of probiotics].

Such biological factors as bile, gastric juice, blood serum, amino acids and pH of the medium have been studied for their effect on the growth intensity and antagonistic activity of bacilli being the basis of biosporin and subalin. It has been established that pH of the medium within 7.0-9.

[The serological properties of a lysine producer developing in a batch culture].

Immune sera specific to bacterial cells at various development stages of periodic culture have been obtained with the purpose to study serological properties of lysin producer. Using the method of immunoenzyme analysis ELISA it is shown that there is certain dependence between the producer properties and the culture age. Different strains-producers used in production to-day are serologically close between each other.

[Gram-negative bacteria contaminating the process of producing lysine].

The authors have isolated Gram-negative bacteria of the Enterobacteriaceae family from the culture liquid of industrial fermenters with low yield of lysine. Most of them possessed the characters typical of Klebsiella pneumoniae and Escherichia coli, the rest were identified as the representatives of genera Proteus, Providencia, Enterobacter, Hafnia. Strains of Klebsiella pneumoniae, E.

[The nature of the interrelations of different Bacillus thuringiensis serotypes between themselves and other species of the genus Bacillus].

Intraspecies interrelations between representatives of 7 serotypes of Bacillus thuringiensis, as well as antagonistic interrelations between B. thuringiensis and 130 strains of 16 species of Bacillus bacteria were studied. Antagonistic activity was determined for 18 strains, representatives of genus Bacillus, with respect to B.

[L-forms of aerobic spore-forming bacteria isolated from urologic patients].

New data are presented on the ability of different aerobic spore-forming bacteria isolated from the organism of urological patients to produce L-forms of these microorganisms in the presence of penicillin and ampicillin. Bacillus cereus is shown to be the most resistant to these antibiotics.