EN
The intestinal bacteria used for the experiments were: B. mesentericus, Lactobacillus acidophilus (stock strain and that isolated from a 5-day-old rat), E. coli, Pseudomonas aeruginosa and Proteus sp. (isolated from the mouse intestine). B. mesentericus was found to inhibit the development of intestinal Trichinella and to a less degree of muscular larvae L. acidophilus, particularly the strain isolated from the stomach reduced the growth of intestinal Trichinella as compared with the control animals. The remaining bacteria used for the experiments Pseudomonas aeruginosa, E. coli and Proteus sp. favour considerably the development of intestinal Trichinella. The number of T. spiralis in the intestine of mice, deprived of bacteria trough sterilization of the alimentary tract, was twice less than control animals.