Antibiotic therapy of Acinetobacter baumannii bloodstream infection in COVID-19 patients

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.

Study of cases of Pseudomonas aeruginosa bacteria in patients with severe COVID-19

Pseudomonas aeruginosa can cause severe nosocomial infections and sepsis, especially in immunocompromised comorbid patients. The purpose of the study was to assess the frequency, clinical course, and the possibility of antimicrobial therapy for bloodstream infections caused by P. aeruginosa in patients with COVID-19. Material and methods. A retrospective single-center uncontrolled study was performed from October 1, 2020 to September 31, 2021 on the basis of a temporary infectious diseases hospital for patients with COVID-19 at the City Clinical Hospital No. 52, Moscow. During the analyzed period, 16 047 patients were admitted to the infectious diseases hospital. The study included 46 patients over 18 years of age with a diagnosis of COVID-19 confirmed by PCR RNA SARS-CoV-2 nasopharyngeal swab (U 07.1) and/or computed tomography (CT) of the lungs (U 07.2). Statistical data processing was carried out using the BioStat, 2009 program (AnalystSoft, USA). Results and discussion. P. aeruginosa has been isolated from the blood of 0.29% of patients with COVID-19. In the structure of bacteremia, P. aeruginosa accounted for 6.1%. In 87% of cases, pathogens were isolated from the blood of patients in the ICU. Most strains are classified as XDR phenotypes - 74% and MDR - 21.7%. The sensitivity of hospital strains of P. aeruginosa was: to colistin - 97%, to amikacin - 39.1%, meropenem - 32.6%. All patients had concomitant diseases: cardiovascular (60%), oncological (27.5%), diabetes mellitus (20%), obesity (22.5%) and others. In 47.5% of cases (19/40), the cause of bloodstream infections was ventilator-associated pneumonia. The mortality rate among patients with COVID-19 with P. aeruginosa bacteremia is 80%. Conclusion. The wide distribution of multidrug-resistant strains of P. aeruginosa limits the number of therapeutic options. In severe bloodstream infections caused by P. aeruginosa XDR, combined antibiotic therapy regimens with the inclusion of polymyxin B are advisable.Copyright © 2022 Tomsk Polytechnic University, Publishing House. All rights reserved.

Study of cases of Pseudomonas aeruginosa bacteria in patients with severe COVID-19

Pseudomonas aeruginosa can cause severe nosocomial infections and sepsis, especially in immunocompromised comorbid patients. The purpose of the study was to assess the frequency, clinical course, and the possibility of antimicrobial therapy for bloodstream infections caused by P. aeruginosa in patients with COVID-19. Material and methods. A retrospective single-center uncontrolled study was performed from October 1, 2020 to September 31, 2021 on the basis of a temporary infectious diseases hospital for patients with COVID-19 at the City Clinical Hospital No. 52, Moscow. During the analyzed period, 16 047 patients were admitted to the infectious diseases hospital. The study included 46 patients over 18 years of age with a diagnosis of COVID-19 confirmed by PCR RNA SARS-CoV-2 nasopharyngeal swab (U 07.1) and/or computed tomography (CT) of the lungs (U 07.2). Statistical data processing was carried out using the BioStat, 2009 program (AnalystSoft, USA). Results and discussion. P. aeruginosa has been isolated from the blood of 0.29% of patients with COVID-19. In the structure of bacteremia, P. aeruginosa accounted for 6.1%. In 87% of cases, pathogens were isolated from the blood of patients in the ICU. Most strains are classified as XDR phenotypes – 74% and MDR – 21.7%. The sensitivity of hospital strains of P. aeruginosa was: to colistin – 97%, to amikacin – 39.1%, meropenem – 32.6%. All patients had concomitant diseases: cardiovascular (60%), oncological (27.5%), diabetes mellitus (20%), obesity (22.5%) and others. In 47.5% of cases (19/40), the cause of bloodstream infections was ventilator-associated pneumonia. The mortality rate among patients with COVID-19 with P. aeruginosa bacteremia is 80%. Conclusion. The wide distribution of multidrug-resistant strains of P. aeruginosa limits the number of therapeutic options. In severe bloodstream infections caused by P. aeruginosa XDR, combined antibiotic therapy regimens with the inclusion of polymyxin B are advisable. © 2022 Tomsk Polytechnic University, Publishing House. All rights reserved.

Antibiotic therapy of Acinetobacter baumannii bloodstream infection in COVID-19 patients

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. © Eco-Vector, 2022.

Rationale for the Use of Cyclophosphamide in COVID 19-Associated Pulmonary Fibrosis

Pneumonia is a serious complication of the new coronavirus infection, also known as COVID-19. Patients if risk groups who require ICU care and mechanical ventilation are at the highest risk to develop lung fibrosis. This review analyzes the use of cytostatic agents such as cyclophosphamide with his proven efficacy against lung fibrosis of various etiologies and considers its potential effectiveness in the treatment of post-Covid pulmonary fibrosis.