Effects of antibiotic treatment on the lactobacillus composition of vaginal microbiota.

We analyzed sensitivity of 123 vaginal lactobacillus strains to antibacterial substances. All lactobacillus strains were sensitive to ampicillin, cefazolin, cefotaxime, and vancomycin, and insensitive to metronidazole, trimethoprim/sulfamethoxazole, and levofloxacin. Lactobacillus strains demonstrated different sensitivity to gentamycin, clindamycin, erythromycin, ciprofloxacin, and tetracycline. The phenomenon of preferential selective influence of antibacterial drugs on the composition of lactobacilli of the vaginal microbiota, in which some lactobacilli survive as part of the vaginal microbiota and have a selective advantage over other types of lactobacilli, should be taken into account during treatment of vaginal infections and dysbiosis.

[Specific features of normal vaginal microflora in girls of preschool age]. / Osobennosti normal'noi mikroflory vlagalishcha u devochek doshkol'nogo vozrasta.

The study of the vaginal microbial cenosis in 20 healthy girls aged 3-7 years did not confirm the notion on the dominating role of cocci (including epidermal staphylococci). The associations of 2-5 different microorganisms represented by more than 20 species in an amount of 4-6 Ig PFC/g of discharge were established. In the overwhelming majority of the examinees (84.2%) the microbial associations of the vagina were found to contain bifidobacteria. Gram positive cocci (staphylococci and streptococci) took the 2nd and 3rd places in the isolation rates and were detected in vaginal associations in 78.9% of the girls. Staphylococci were represented by 5 coagulase-negative staphylococcal species with S. simulans and S. epidermidis prevailing. Hemolytic streptococci variants alpha and beta were isolated in the proportion of 2:1. The latter belonged to serogroups C and F. No S. aureus, Lactobacillus sp., streptococci of groups A and B, yeast-like fungi were detected. Genital mycoplasms (M. hominis) could rarely be found in the vaginal discharge of the girls aged 3-7 years (5.3%). No resident and transitory components could be isolated from the normal vaginal microflora and no quantitative domination of any bacterial species (genus) was shown. The concentrations of all organisms in this association were moderate or low.

[Evaluation of the sensitivity and specificity of methods of rapid diagnosis in bacterial vaginosis]. / Otsenka chuvstvitel'nosti i spetsifichnosti uskorennykh metodov diagnostiki bakterial'nogo vaginoza.

Bacterial vaginosis was diagnosed in 35.8% of 109 patients of a reproductive age complaining of discharge from the genital tract. In 33% of cases bacterial vaginosis was associated with vaginal candidiasis. The most sensitive and specific method of rapid diagnosis of bacterial vaginosis is microscopic examination of Gram-stained smears, which may be used as a diagnostic method, whose sensitivity and specificity are almost 100%. Such tests as pH-metry, amine test, "key" cells, and assessment of vaginal discharge (normal or abnormal), should be used in complex. They may be performed by the therapist screening patients to detect bacterial vaginosis.

[Frequency of detection and the species composition of anaerobic gram-negative nonsporulating bacteria in suppurative pathology in emergency surgery]. / Chastota obnaruzheniia i vidovoi sostav anaérobnykh gramotri-tsatel'nykh nesporoobrazuiushchikh bakterii pri gnoinoi patologii v ékstrennoi khirurgii.

The improved technique of cultivation allowed to detect obligatorily anaerobic microorganisms in 58 out of 94 samples from patients with purulent inflammatory processes. The results of the studies showed that anaerobic microorganisms were most frequently isolated from the exudate of the abdominal cavity and the purulent discharge of wounds in peritonitis patients. Gram-negative nonsporulating bacilli made up 25.3% of all the isolated cultures. The identification of these microorganisms allowed to determine that in the exudate of the abdominal cavity, the discharge of surgical and posttraumatic wounds, and of the pleural cavity the representatives of the family Bacteroidaceae mainly occurred. Most frequently B. thetaiotaomicron and B. fragilis were isolated.