[Effect of bifidobacteria and lactobacillus and antibiotics in combination with common gnotobiological isolation on the survival of mice with acute radiation sickness]. / Vliianie na vyzhivaemost' myshei pri ostroi luchevoi bolezni bifido- i laktobakterii i antibiotikov v komplekse s obshchei gnotobiologicheskoi izoliatsiei.

The influence of the combined use of bacterial preparations (Bifidobacterium and Lactobacillus) and antibiotics (ciprofloxacin, lomefloxacin and amikacin) on the survival rate of irradiated mice placed under the conditions of general gnotobiological isolation was studied. Bacterial strains used in combination with quinolones (ciprofloxacin, lomefloxacin) significantly increased the mean survival time of the animals (p < 0.05) when introduced in a dose of 1.0 x 10(9) microbial cells per mouse on days 1, 3, 5, 7, 9, 11, 13 and 15 after irradiation. At the same time a short course of treatment with bacterial preparations (two injections on days 5 and 7 after irradiation) proved to be insufficient for increasing the survival rate of the animals. The mean survival time of the irradiated mice was higher after the use of bacterial preparations in combination with lomefloxacin or ciprofloxacin than after their use with amikacin.

[The vaginal Bifidobacterium flora in women of reproductive age]. / Izuchenie bifidoflory vlagalishcha u zhebshchin reproduktivnogo vozrasta.

The composition of vaginal bifidoflora in 56 clinically healthy women of reproductive age was studied. The study revealed that four species of bifidobacteria, viz. Bifidobacterium bifidum, B. breve, B. adolescentis 2 and B. longum, dominated in the composition of this bifidobacterial population. Nine out of 11 isolated strains were found to be capable of inhibiting indicator microorganisms Staphylococcus aureus and Enterococcus faecalis when tested in vitro; in addition, strains B. adolescentis 2 F1, B. bifidum G1, B. breve P2 and B. longum Z4 inhibited Klebsiella ozaenae, Pseudomonas aeruginosa, Escherichia coli and were also active acid producers. Three of these 4 bifidobacterial strains were capable of adhesion to vaginal epitheliocytes, while B. bifidum G1 was practically incapable of adherence to these cells, similarly to B. bifidum strain 791 of intestinal origin. In addition, the spectra of antibiotic susceptibility varied from strain to strain, but all bifidobacterial strains were susceptible to benzylpenicillin and resistant to lomefloxacin, most of them being also resistant to cyprofloxacin and gentamicin. Thus the data presented in this work are indicative of the possibility and advantages of using bifidobacterial strains belonging to this ecological niche as probiotics for the correction of the microflora of the urogenital tract in females.