Klebsiella pneumoniae

Objective. To study genetic determinants of resistance and virulence of K. pneumoniae strains received by the reference center for the prevention of the spread of biological threats of the National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation. Materials and Methods. The study included 153 strains of Klebsiella pneumoniae isolated from the biological material of pregnant women and newborns in Perinatal centers in various regions of the Russian Federation with infectious and inflammatory diseases and included in the collection of opportunistic microorganisms of the reference center in 2023.

Klebsiella pneumoniae is one of the most common pathogens causing community-acquired and nosocomial infections in hospitalized patients. Among the two known pathotypes, hypervirulent (hvKp) has become a matter of serious concern, as such isolates can …

Objective. To study pharmacodynamics of meropenem alone and in combination with avibactam in an in vitro dynamic model; to evaluate effectiveness of meropenem against K. pneumoniae strains producing and not producing carbapenemases; to study impact of bacterial inoculum on meropenem activity and its effects. Materials and Methods. K. pneumoniae producing KPC and OXA-48 carbapenemases and non-producing strains were exposed to meropenem or its combination with avibactam (carbapenemase-producing strains only) in a modified in vitro hollow-fiber infection model (pneumoniae) simulating human pharmacokinetics of drugs administrated thrice daily for 5 days.

Objective. To assess the ability of clinical isolates of opportunistic microorganisms to accumulate biofilm biomass under the influence of composite disinfectants. Materials and Methods. The study included 53 strains (49 – K. pneumoniae, 4 – P. aeruginosa) obtained from two multidisciplinary children’s hospitals at the city and regional levels. Specimens were collected from different loci of patients, medical devices, and environmental objects. To assess the reaction of biofilms (BF) of clinical isolates to the effects of disinfectants (DIs), three composite DIs were used: No.

Objective. To analyze and compare multidrug-resistant Klebsiella pneumoniae (KP) strains isolated from different sites of the same patients. Materials and Methods. A total of 30 KP strains isolated from 15 patients treated in intensive care and surgical units in 2020–2021 were studied. Two strains isolated from one child were selected for analyses. One strain was isolated from a clinically significant site (blood/urine/wound/endotracheal aspirate or sputum), the other from a monitoring site (stool).

Objective. To study the prevalence and mechanisms of antibiotic resistance, including carbapenemase production, in clinical isolates of Klebsiella pneumoniae and Escherichia coli isolated in different regions of Russia as part of the sentinel multicenter surveillance study in 2020–2021, and to explore the population structure of K. pneumoniae and the impact of “high-risk clones” on antibiotic resistance. Materials and Methods. Consecutive, non-duplicate isolates of K. pneumoniae (n = 2503) and E.

Objective. To determine the minimum inhibitory concentrations of thiamphenicol and thiamphenicol glycinate acetylcysteinate against clinically significant microorganisms and determine their efficacy against microbial biofilms. Materials and Methods. This study included 48 clinical strains isolated from the sputum of patients with respiratory tract infections (16 S. pneumoniae, K. pneumoniae and S. aureus strains). Antimicrobial susceptibility testing was performed using broth microdilution method. Biofilm formation culturing with antibiotics, N-acetylcysteine and their combinations was assessed in Mueller-Hinton broth and brain heart broth in 96-well plates.

A rare clinical case of native aortic valve infective endocarditis (IE) caused by Klebsiella pneumoniae in a 56-year old man without known risk factors predisposing to the development of IE is presented. Diagnosis of IE in this patient was a …

Objective. To study epidemiology and impact of colonization by multidrug-resistant Gram-negative bacteria (MDRGNB) on bloodstream infections (BSI) during allogeneic hematopoietic stem cell transplantation (allo-HSCT). Materials and Methods. The retrospective study included 288 patients received the first allo-HSCT between 2018 and 2019. The median age was 32 (18–66) years, male – 53% (n = 152). The majority of patients had acute leukemia – 62% (n = 178) and received transplant from matched unrelated – 42% (n = 120) or haploidentical donor – 26% (n = 75).

Objective. To study in vitro antimicrobial resistance and prevalence of the most clinically important carbapenemases genes in Klebsiella pneumoniae clinical isolates in Nizhny Novgorod. Materials and Methods. A total of 238 K. pneumoniae clinical isolates from upper and lower respiratory tracts, abdominal cavity, urogenital tract, and wound discharge were tested in this study. Species identification was done using WalkAway 96 analyzer (Siemens, Germany) with POS Combo Type 20 tablets (Beckman Coulter, USA) and Multiscan FC spectrophotometer (Thermo Scientific, Finland) with Microlatest tablets (PLIVA-Lachema, Czech Republic).