Antimicrobial Resistance | CMAC

Antimicrobial Resistance

Detection of vancomycin-resistant enterococci using chromogenic selective medium

Objective. To detect vancomycin-resistant enterococci (VRE) using chromogenic selective medium CHROMagar™VRE (CHROMagar, France). Materials and Methods. In the first part of the study, a total of 39 vancomycin-resistant and 20 vancomycinsusceptible Enterococcus spp. isolated from blood culture with known susceptibility profiles were incubated on the CHROMagar™VRE (CHROMagar, France) and examined after 24 h and 48 h of incubation. In the second part of the study, a total of 110 rectal swabs were taken from patients with hematological malignancies and incubated on the CHROMagar™VRE.

Susceptibility testing of Candida glabrata clinical strains to echinocandins using SensititreTM YeastOneTM system

Objective. To determine susceptibility of C. glabrata isolates to anidulafungin, caspofungin and micafungin using the SensititreTM YeastOneTM system. Materials and Methods. C. glabrata isolates were taken prospectively from clinical specimens or from strains collections in the participating sites. Susceptibility determination was performed using SensititreTM YeastOneTM (YO10 panel) according to the manufacturer’s guidance, and results were interpreted with M27-A3 CLSI guidelines. Susceptibility of C. glabrata to fluconazole was also determined in order to assess possible correlations of echinocandins and fluconazole minimal inhibitory concentrations (MICs) in resistant strains.

Antimicrobial resistance of Helicobacter pylori in Smolensk

Objective. To study the antimicrobial resistance of H. pylori to clarithromycin, amoxicillin, metronidazole, levofloxacin, tetracycline in adult patients in the Smolensk region. Materials and Methods. Overall, 573 adult patients were included in 2015-2017 and 210 – in 20092010 with positive rapid urease test at the time of gastroscopy for dyspeptic complaints. Antimicrobial susceptibility testing of H. pylori isolates to clarithromycin, amoxicillin, metronidazole, levofloxacin and tetracycline was performed by the agar dilution method.

Simulation of bacterial resistance for different antibiotic consumption strategies based on the Escherichia coli resistance to cephalosporins

Objective. Objectives. To research the qualitative relationships between the level of antimicrobial resistance and the level of consumption of different antimicrobial agents, and to further apply this knowledge to minimize the level of resistance. Materials and Methods. An extensive simulation was performed based on the previously implemented model describing the relationship between a resistance and levels of antibiotic consumption. It makes possible to estimate the resistance growth rates in different antibiotic consumption strategies.

Mechanisms and regulation of antimicrobial resistance in Pseudomonas aeruginosa

Pseudomonas aeruginosa is a dangerous opportunistic pathogen. One of the most negative clinically significant features of P. aeruginosa is associated with the rapid acquisition of antimicrobial resistance. This review provides an analysis of current …

Four cases of resistance mutations in 23S rRNA gene in Mycoplasma pneumoniae isolated from the hospitalized military personnel

Mycoplasma pneumoniae is a bacterial pathogen cause of upper and lower respiratory tract infections, transmitted by airborne droplets, causing outbreaks of pneumonia mainly in closed groups. According with recommendations, M. pneumoniae infections …

The molecular characteristics of antibiotic-resistant strains of Klebsiella pneumoniae isolated in traumatology hospitals

This study analyzed a prevalence of carbapenem-resistant Klebsiella pneumoniae strains obtained in the Privolzhsky Federal Medical Research Center units and their antibiotic resistance mechanisms. During the study year, the incidence of K. pneumoniae …

Carbapenemase-producing Gram-negative bacteria in the Russian research center of radiology and surgical technologies

Objective. To assess an incidence rate of carbapenemase-producing Gram-negative bacteria isolated from patients in the RRCRST. Materials and Methods. The clinical Gram-negative isolates obtained from patients hospitalized to the RRCRST over the period of February 2014 to April 2016 were tested. A screening for carbapenem resistance was performed by culture on chromogenic media, and species identification was made using MALDI-TOF massspectrometry. Susceptibility of Gram-negative bacteria to antimicrobial agents was determined using VITEK-2.

Antimicrobial resistance of Neisseria gonorrhoeae in the Russian Federation: regional differences

Objective. To assess regional differences in antimicrobial susceptibility of N. gonorrhoeae in the Russian Federation. Materials and Methods. A total of 365 N. gonorrhoeae strains were isolated over the period of 2015-2016 in Arkhangelsk, Astrakhan, Bryansk, Kaluga, Novosibirsk, Omsk, Ryazan, Tomsk regions, Republic of Tatarstan and Chuvashiya Republic. Antimicrobial susceptibility testing was performed by agar dilution method and assessed according to MUK 4.2.1890-04 criteria using WHONET software (v5.4). Molecular typing was performed according to the NG-MAST protocol.

Antimicrobial resistance and clonal evolution of Streptococcus pneumoniae serotype 19A in Russia during 2002-2013

After the introduction of the conjugated 7-valent pneumococcal vaccine (PCV7) the incidence of infections, caused by non-vaccine serotypes of S. pneumoniae, especially by 19А serotype, significantly increased. But in few countries similar phenomenon …