Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Antimicrobial pattern and clonal dissemination of extended-spectrum beta-lactamase producing Klebsiella spp isolates

Fri Apr 19 11:28:14 2024

(2010) Antimicrobial pattern and clonal dissemination of extended-spectrum beta-lactamase producing Klebsiella spp isolates. American Journal of Infectious Diseases. pp. 110-121. ISSN 15536203 (ISSN)

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Problem statement: Gram-negative pathogens harboring ESBLs have caused numerous outbreaks of infections and are becoming an increasing therapeutic problem in many countries. The incidence of ESBL-producing strains among clinical isolates has been steadily increasing over the past years resulting in limitations of therapeutic option. The focus of this study was to examine the molecular epidemiology of ESBL-producing Klebsiella spp, investigate the susceptibility of Klebsiellae spp producing ESBLs towards non-beta-lactam antibiotics in the different seasons, identify the various clonal types of ESBL-producing K.pneumoniae and detect the dominant ESBL clonal types. Approach: Clinical isolates of Klebsiella spp were identified during the period March 2007-April 2008. ESBLs production identified by phenotypic and genotypic methods. MLST was performed for dissemination of ESBLs producing K. pneumoniae. Results: The findings showed that 51.6 of K.pneumoniae were produces ESBLs. 35.8, 21.2 and 38.7 of K. pneumoniae producing ESBLs were resistant to amikacin, ciprofloxacin and cotrimoxazol, respectively. It was found that 40 and 27.3 of K.oxytoca producing ESBLs were resistant to cotrimoxazol and amikacin, respectively. The findings reflected that ESBLs existed in 73 of K. oxytoca. The results showed that the frequency of blaSHV, blaTEM and blaCTX-M due to K.pneumoniae producing ESBLs were 87.5, 12.4 and 24.8, respectively. Of the eleven K. oxytoca producing ESBLs, 100 blaSHV were obtained. Based on the nucleotide variations of the five genetic loci, twenty-five different STs could be identified among thirty K.pneumoniae producing ESBLs isolates. Among the STs shared by multiple isolates, the most frequently encountered were 14, 16 and ST18. Conclusion: In conclusion, the percentage of K.oxytoca producing ESBLs was higher than K.pneumoniae producing ESBLs. Generally, K.penomoniae produces more ESBLs in winter and fall than in the other seasons. © 2010 Science Publications.

Item Type: Article
Sadeghifard, N.UNSPECIFIED
Keywords: Antimicrobial pattern Extended spectrum beta-lactamases (ESBL) Intensive care units (ICUS) Klebsiella pneumoniae Klebsiella spp Respiratory tract infection (RTI) Single locus variant (SLV) Urinary tract infection (UTI) amikacin ceftazidime ceftriaxone ciprofloxacin cotrimoxazole extended spectrum beta lactamase antibiotic resistance antibiotic sensitivity article bacterium isolate genotype Klebsiella oxytoca nonhuman phenotype
Page Range: pp. 110-121
Journal or Publication Title: American Journal of Infectious Diseases
Journal Index: Scopus
Volume: 6
Number: 4
Identification Number:
ISSN: 15536203 (ISSN)
Depositing User: مهندس مهدی شریفی

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