High antimicrobial properties of antiseptics determine the scientific interest in the study of their effect on the biofilm formation of clinically significant pathogens and the detection of a probable dependence between the sensitivity of bacteria to them and the ability to form biofilms. The aim — was to study the biofilm-forming properties of clinical strains of P.aeruginosa, depending on their sensitivity to various antiseptic medicines. 30 clinical strains of P.aeruginosa were isolated and identified from the patients with infectious complications of different areas who had been treated at the burn, intensive care and surgical units. The study of biofilm-forming properties of clinical isolates of P.aeruginosa was performed by using the spectrophotometric technique by G.D. Christensen (MtP microtiter plate test). The sensitivity assessment of the derived strains to antiseptics (decametoxine, decasan, miramistin, chlorhexidine) was done by double serial dilutions according to the standard procedure approved by the Order №167 of the Ministry of Public Health of Ukraine. The statistical processing of the results obtained was carried out by “Microsoft Excel 2010” software package. In order to determine the relationship between the biofilm formation and sensitivity to antiseptic medicines of P. aeruginosa strains, we determined the correlation coefficient (r-Pearson coefficient). The clinical strains of P.aeruginosa were found to be the most sensitive to decasan and miramistin, and their MICs did not differ 70,31±25,98 mg/ml and 68,5±33,20 mg/ml respectively. Chlorhexidine has been shown a reducing of antimicrobial efficiency against P.aeruginosa (MIC 115,62±59,75 μg/ml). High biofilm-forming properties of clinical isolates P.aeruginosa have been proved. The optical density of the biofilms formed by these microorganisms was 0,674±0,17 density units for 24 hours of cultivation. A direct correlation between the sensitivity of strains P.aeruginosa to decamethoxine, decasan, miramistin and their biofilm-forming properties was established. The sensitivity of the clinical strains to chlorhexidine did not depend on their biofilm potential. Clinical strains of P.aeruginosa have high biofilm-forming properties and retain sensitivity to antiseptic medicines based on cationic surfactant antiseptics. Decamethoxine and miramistin provide the highest antimicrobial action on P.aeruginosa isolates. The sensitivity of P.aeruginosa to decamethoxine, decasan, miramistin has shown to be in a direct correlation with their biofilm-forming properties.

BACKGROUND: The limited amount of information available today does not fully reflect the biological properties of Streptococcus pluranimalium as a pathogen new to humans, its pathogenicity factors, and, as a consequence, the pathogenesis of diseases, which is causes AIM: The aim of this research was to study the biological properties of S. pluranimalium, its sensitivity to antibiotics and antiseptics, as well as its adhesive properties. METHODS: Two hundred samples were collected from the coronal pockets in patients with acute purulent pericoronitis during 2019–2021 years. Among them, five clinical strains of S. pluranimalium were isolated. Final identification was carried out using a Vitec-2compact bioMérieux automatic bacteriological analyzer. The sensitivity of the studied microbial strains to antibiotics of various groups was determined by the disk diffusion method. The adhesive properties of S. pluranimalium were determined according to the standard Brilis method. RESULTS: It possesses typical morphological and cultural properties characteristics of the genus Streptococcus representatives. This microorganism virtually does not break down carbohydrates, but it produces arylamidases that enables it to be differentiated from other streptococci. S. pluranimalium demonstrates variable sensitivity to antibiotics; the lowest sensitivity has been found out to the second-generation fluoroquinolones. In addition, the clinical isolates studied show high adhesive properties to human red blood cells. CONCLUSIONS: S. pluranimalium is increasingly acting as the causative agent of human infectious diseases. The information available today fully reflects the biological properties of a pathogen new to humans, its pathogenicity factors.

Introduction: Acute viral rhinitis is one of the most common pathologies among the population of the globe. Although, at first glance, this pathology seems simple and well-studied, but due to the high incidence, the load it creates on the health care system encourages in-depth study. Aims: To examine the dynamics of changes in quality of life and local levels of TNF-α and IL-1β in patients with acute viral rhinitis in different treatment regimens. Methodology: The prospective study included 84 patients with a confirmed diagnosis of acute viral rhinitis. In accordance with the purpose and objectives of the study, all patients on days 1, 5 and 10, in addition to routine studies, were determined by local levels of TNF-α and IL-1β, as well as to determine the quality of life. Results: In patients of the study group, only partial recovery of local levels of TNF-α and IL-1β and indicators of the physical component of quality of life was observed during 10 days of treatment. The emotional and functional components of quality of life in patients of this study were more correlated than with the physical component and local levels of proinflammatory cytokines, which are objective indicators of the activity of the inflammatory process. Complementing the traditional treatment regimen with 0.25% oxolin in the form of an ointment has reduced the duration of the disease, reduced the incidence of bacterial complications and improved the quality of life of patients with acute viral rhinitis in the short term. Conclusions: The dynamics of local levels of TNF-α and IL-1β reflects the nature of the inflammatory process in the nasal mucosa and clearly correlates with the physical component of quality of life.

Bobyr V. V., Nazarchuk O. A. The role of sorbents and probiotics in the prevention of structural-morphological disorders in mice with dysbiosis on the background of virus-bacterial infection.