ArticleBMC microbiology2023
Evaluation of antibiotic resistance, toxin-antitoxin systems, virulence factors, biofilm-forming strength and genetic linkage of Escherichia coli strains isolated from bloodstream infections of leukemia patients.
Article in BMC microbiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 12 citations in OpenAlex.
- Risk factors for antibiotic resistance and 30-day mortality among adult patients with acute leukemia and Escherichia coli bloodstream infection.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026Article
- Genetic diversity, antimicrobial resistance, and biofilm-associated virulence in clinical Enterococcus faecalis isolates from Hamedan, Iran.BMC infectious diseases · 2026Article
- Bacterial distribution and disease burden analysis in hospital-acquired bloodstream infections according to Diagnosis-Related Groups (DRGs) data.BMC infectious diseases · 2026Article
- Molecular identification of toxin-antitoxin system genes and their relationship with biofilm formation among clinical isolates of Escherichia coli obtained from hospitalized and outpatients in educational hospitals in Ahvaz, Iran.GMS hygiene and infection control · 2026Article
- Escherichia coli causing bloodstream infections in Mexican paediatric patients: molecular typing, antimicrobial resistance, virulence factors, and clinical features.BMC infectious diseases · 2025Article
- Genetic Evolution of Antibiotic Resistance and Virulence Genes inMicroorganisms · 2025Article
- Analysis of phylogroups, biofilm formation, virulence factors, antibiotic resistance and molecular typing of uropathogenic Escherichia coli strains isolated from patients with recurrent and non-recurrent urinary tract infections.BMC infectious diseases · 2025Article
- Gram Negative Biofilms: Structural and Functional Responses to Destruction by Antibiotic-Loaded Mixed Polymeric Micelles.Microorganisms · 2024Article
- Unveiling the genetic architecture and transmission dynamics of a novel multidrug-resistant plasmid harboring blaBMC microbiology · 2024Article
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5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundOne of the most common complications in patients with febrile neutropenia, lymphoma, leukemia, and multiple myeloma is a bloodstream infection (BSI).
objectiveThis study aimed to evaluate the antibiotic resistance patterns, virulence factors, biofilm-forming strength, and genetic linkage of Escherichia coli strains isolated from bloodstream infections (BSIs) of leukemia patients.
methodsThe study conducted in Iran from June 2021 to December 2022, isolated 67 E. coli strains from leukemia patients' bloodstream infections in hospitals in two different areas. Several techniques including disk diffusion and broth microdilution were used to identify patterns of antibiotic resistance, microtiter plate assay to measure biofilm formation, and PCR to evaluate the prevalence of different genes such as virulence factors, toxin-antitoxin systems, resistance to β-lactams and fluoroquinolone antibiotics of E. coli strains. Additionally, the genetic linkage of the isolates was analyzed using the Enterobacterial Repeat Intergenic Consensus Polymerase Chain Reaction (ERIC-PCR) method.
resultsThe results showed that higher frequency of BSI caused by E. coli in man than female patients, and patients with acute leukemia had a higher frequency of BSI. Ampicillin and Amoxicillin-clavulanic acid showed the highest resistance, while Imipenem was identified as a suitable antibiotic for treating BSIs by E. coli. Multidrug-resistant (MDR) phenotypes were present in 22% of the isolates, while 53% of the isolates were ESBL-producing with the blaCTX-M gene as the most frequent β-lactamase gene. The fluoroquinolone resistance genes qnrB and qnrS were present in 50% and 28% of the isolates, respectively. More than 80% of the isolates showed the ability to form biofilms. The traT gene was more frequent than other virulence genes. The toxin-antitoxin system genes (mazF, ccdAB, and relB) showed a comparable frequency. The genetic diversity was detected in E. coli isolates.
conclusionOur results demonstrate that highly diverse, resistant and pathogenic E. coli clones are circulating among leukemia patients in Iranian hospitals. More attention should be paid to the treatment and management of E. coli bloodstream infections in patients with leukemia.
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