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Introduction This study aimed to determine the prevalence of multidrug-resistant Gram-negative bacteria (GNB) from blood cultures in a tertiary-care hospital and the multiplex PCR assay's ability to detect resistance genes. Methods A total of 388 GNB isolates obtained from hospitalized patients between November 2019 and November 2021 were included in the study. Antimicrobial susceptibility testing was done by VITEK 2 system and broth microdilution method. Beta-lactamase-encoding genes were detected by multiplex PCR assays, BioFire-Blood Culture Identification 2 (BCID2) panel (bioMerieux, France). Extended-spectrum beta-lactamases (ESBLs) were detected phenotypically with VITEK AST-GN71 card (bioMerieux, France). The isolates of GNB were classified into multidrug-resistant, extensively-drug-resistant, and pandrug-resistant categories, and their prevalence and distribution in different wards, including coronavirus diseases 2019 (COVID-19) intensive care units (ICU), were calculated. Results Results revealed that all isolates of Acinetobacter baumannii and Pseudomonas aeruginosa were multidrug-resistant as well as 91.6% of Enterobacter cloacae, 80.6% of Proteus mirabilis, and 76.1% of Klebsiella pneumoniae, respectively. In fermentative bacteria, blaOXA-48-like (58.1%), blaNDM (16.1%), blaKPC (9.7%) and blaVIM (6.5%) genes were detected. More than half of Enterobacter cloacae (58.3%) and Klebsiella pneumoniae (53.7%) produced ESBLs. Among non-fermenters, the blaNDM gene was carried by 55% of Pseudomonas aeruginosa and 19.5% of Acinetobacter baumannii. In the COVID-19 ICU, Acinetobacter baumannii was the most common isolate (86.1%). Conclusions This study revealed high proportions of multidrug-resistant blood isolates and various underlying resistance genes in Gram-negative strains. The BCID2 panel seems to be helpful for the detection of the most prevalent resistance genes of fermentative bacteria.Copyright © GERMS 2022.
ABSTRACT
Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material(s) and Method(s): In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially.Copyright © 2023 University of Ankara. All rights reserved.
ABSTRACT
Secondary bacterial infection is one of the important risk factors for the development of severe course and death in COVID-19. The rational choice of antibacterial therapy is based on the data of microbiological monitoring of pathogens of healthcare-associated infections. The aim of the study is to determine the main options for antibiotic therapy of Acinetobacter baumannii bloodstream infection in COVID-19 patients. Material and methods. A retrospective, single-centre, uncontrolled study of the incidence of A. baumannii bacteremia in COVID-19 patients treated at the City Clinical Hospital No. 52 in Moscow from October 2020 to September 2021 was performed. For each strain of A. baumannii sensitivity to the main antibacterial agents was determined. Genetic determinants of antibiotic resistance were studied by real-time multiplex polymerase chain reaction. The main therapeutic options for A. baumannii bloodstream infection were analyzed. Results and discussion. Bloodstream infections were diagnosed in 4.7% of hospitalized patients with COVID-19 (758/16 047). Gram-negative bacteria were the causative agents of bloodstream infections in 76% of cases. A. baumannii were isolated from the blood of 143 patients (0.89%). Detection of the pathogen in the blood of COVID-19 patients was associated with severe and extremely severe course of the disease. Most of the strains (93%) were isolated in the intensive care unit. The A. baumannii strains studied were carbapenem-resistant (CRAb) and phenotypically belonged to the XDR class. According to a PCR study, A. baumannii strains were producers of oxacillinases OXA-23, OXA-40, and OXA-51. Conclusion. The circulation of A. baumannii CRAb in intensive care units makes empiric therapy based on carbapenems irrational and ineffective. For the etiotropic therapy of A. baumannii bloodstream infection it is recommended to use combined antibiotic therapy regimens with the inclusion of polymyxin B and sulbactam.Copyright © Eco-Vector, 2022.
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Objectives: This study aimed to describe the pathogen spectrum of bacteria and viruses of RTIs in hospitalized children during the Coronavirus disease 2019 (COVID-19) epidemic in Shenzhen. Method(s): From October 2020 to October 2021, the results of pathogenic tests causing RTIs were retrospectively analyzed in hospitalized children in Shenzhen Luohu Hospital Group. Result(s): 829 sputum samples for bacterial isolation and 1,037 nasopharyngeal swabs for virus detection in total. The positive detection rate (PDR) of bacteria was 42.1%. Staphylococcus aureus (18.8%) was the predominant bacteria detected in positive cases, with Moraxella catarrhalis (10.9%), Streptococcus pneumoniae (9.5%) following. The PDR of the virus was 65.6%. The viruses ranking first to third were Human Rhinovirus (HRV), Respiratory syncytial virus (RSV), and Human Parainfluenza (HPIV), with rates of 28.0, 18.1, and 13.5%, respectively. Children under 3 years were the most susceptible population to RTIs. The pathogens of S. aureus, M. catarrhalis, S. pneumoniae, HRV, and HPIV were more prevalent in autumn. Meanwhile, RSV had a high rate of infection in summer and autumn. S. aureus and HRV had higher co-infection rates. Conclusion(s): Our findings demonstrate the pathogen spectrum of 1,046 hospitalized children with RTIs in Shenzhen, China, during the COVID-19 outbreak.Copyright © 2022 the author(s), published by De Gruyter, Berlin/Boston.
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Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material(s) and Method(s): In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially.Copyright © 2023 University of Ankara. All rights reserved.
ABSTRACT
Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material(s) and Method(s): In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially.Copyright © 2023 University of Ankara. All rights reserved.
ABSTRACT
Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material and Method: In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially. © 2023 University of Ankara. All rights reserved.
ABSTRACT
Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material and Method: In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially.
ABSTRACT
Objective: In recent years, the rapid spread of resistance caused by the production of extended-spectrum beta-lactamase (ESBL) among bacteria has increased the importance of K. pneumoniae bacteria. Regular monitoring of antibiotic resistance rates of bacteria is very important for the treatment of infections and new treatment methods that can be developed. In the study, it was aimed to determine the antibiotic resistance profiles and ESBL positivity rates of K. pneumoniae isolated from patients who applied to Biruni University Hospital between March 2020 and March 2021, covering the COVID-19 Pandemic. Material and Method: In the study, antibiogram test results and ESBL presences of K. pneumoniae bacteria isolated from samples sent from different outpatient clinics and services were evaluated retrospectively. GraphPad InStat V. 3.05 was used for statistical analysis. Result and Discussion: In the study, 423 K. pneumoniae bacteria were isolated from different clinical samples. Of the isolates, 161 (38%) were obtained from the endotracheal aspirate (ETA) sample, and 349 (82.5%) were obtained from the intensive care clinic. In addition, 358 (84.63%) of the isolates were ESBL positive and 65 (15.36%) ESBL negative. It was observed that the majority of the isolates obtained were resistant to ampicillin, and almost all of the ESBL positive isolates were resistant to ceftazidime. Both the studies and the results of the study show that the number of K. pneumoniae strains showing multiple antibiotic resistance has increased over time and this increase continues exponentially. © 2023 University of Ankara. All rights reserved.
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Background. Patients with severe SARS-CoV-2 infection are at high risk of complications due to the intensive care unit stay. Hospital-acquired infections (HAI) are one of the most common complication and cause of death in this group of patients, it is important to know the epidemiology and microbiology of this hospital-acquired infections in order to begin to the patients a proper empirical treatment. We describe the epidemiologic and microbiologic characteristics of HAI in patients with COVID-19 hospitalized at intensive care unit (ICU) in a tertiary level private hospital in Mexico City. Methods. From April to December 2020, data from all HAIs in patients with severe pneumonia due to SARS-CoV-2 infection with mechanical ventilation at ICU were obtained. The type of infection, microorganisms and antimicrobial susceptibility patterns were determined. Results. A total of 61 episodes of HAIs were obtained, the most common was ventilator associated pneumonia (VAP) in 52.4% (n=32) followed by urinary tract infection (UTI) 34.4%(n=21) and bloodstream infection (BSI) 9.84% (n=6). Only two episodes corresponded to C. difficile associated diarrhea. We identified 82 different microorganisms, the most frequent cause of VAP was P. aeruginosa 22% (10/45) followed by K. pneumoniae 20% (9/45);for UTI, E. coli 28.5% (6/21), and S. marcescens 19% (4/21);for BSI the most frequent microorganism was S. aureus 28.5 (2/7). Regarding the antimicrobial susceptibility patters the most common were Extended Spectrum Beta-Lactamase (ESBL) Gram-negative rods followed by Methicillinresistant Staphylococcus aureus. Conclusion. In patients with severe COVID-19 hospitalized in the ICU the most frequent HAIs were VAP and UTI caused by P. aeruginosa and E. coli respectively. ESBL enterobacteriaceae was the most common resistant pattern identifed in the bacterial isolations in our series.