The state of the microbiota of prostate secretion in patients with chronic bacterial prostatitis before and after antibacterial treatment

Introduction. The effect of antibiotics on the microbiota of different organs is the subject of close attention and an urgent problem of modern medicine. The literature mainly contains works related to the effect of antibiotics on the intestinal microflora and some other organs other than the genitourinary organs. On the other hand, the microbiota of many organs, including the prostate, largely depends on the gut microbiota. Objective: to conduct a comparative analysis of the microbiota of prostate secretion (PS) in patients with chronic bacterial prostatitis (CBP) before and after antibacterial treatment. Material and methods. A prospective study of PS was conducted in 38 patients with CBP aged 25 to 50 years. The study of the microbiota of prostate secretion was carried out using cultural methods, real-time PCR and using a gas chromatograph of the Maestro mass spectrometer (Interlab LLC, Russia), by the methods of mass-spectrometry microbes markers (MSMM). Results. According to the statistical analysis of absolute indicators obtained from the MSMM data, a sharp decrease in the number of almost all groups of microorganisms (MO) has been established. At the same time, the level of the cocco-bacillary group decreased from 1,049.50 x cells/g to 142.00 x 105 cells/g, the level of anaerobes from 1,638.00 to 221.50, the level of actinobacteria from 197.00 to 40.00, the level of enterobacteria from 452.50 to 87.00, the level of gram-negative rods from 79.00 to 25.00, the level of fungi and yeast from 56.00 to 23.00, the level of viruses from 24.50 to 3.00x105 cells/g (p <0.0001; p = 0.0004; p = 0.0033; p = 0.0007; p <0.0001). In addition, there was a decrease in the level of resident MO, transient opportunistic, normally non-occurring MO and MO sum, as well as a decrease in the level of plasmologens and endotoxin sum (p <0.0001). When analyzing the relative value in the microbiome of individual MO, a decrease in the proportion of cocco-bacillar flora, actinobacteria, enterobacteria, viruses, transient and normally non-occurring microorganisms was noted, while the proportion of grams of negative rods increased by 48.4% (p = 0.0033), fungi and yeast by 74.4% (p<0.0001), anaerobes by 6.3% (p<0.0001), resident bacteria by 5.3% (p<0.0001). The decrease in the level of plasmologen reached 63.9% (p<0.0001), endotoxin 64.3% (p<0.0001). Conclusion. The analysis showed that antibiotics lead to a decrease in the level of absolute values in almost all microorganisms, regardless of belonging to different taxonomic groups, while the relative values in some groups increase and in others decrease. Keywords: microbiota, prostate secretion, gas chromatography-mass spectrometry, microorganisms.