Document Detail

Prevalence and Genetic Characteristics of TEM, SHV, and CTX-M in Clinical Klebsiella pneumoniae Isolates from Saudi Arabia.
MedLine Citation:
PMID:  21612509     Owner:  NLM     Status:  Publisher    
The prevalence and genetic basis of extended-spectrum beta-lactamases (ESBLs) in Klebsiella pneumoniae remains unclear in Saudi Arabia. Therefore, this study was devoted to determine the prevalence and characterize ESBL-producing K. pneumoniae in Al-Qassim area, Saudi Arabia. A total of 430 isolates of K. pneumoniae isolated from clinical samples were collected over 6 months from January to June 2008. These isolates were screened for the presence of ESBLs by double-disk synergy test and re-evaluated by E-test ESBL method. Minimum inhibitory concentrations of 15 antibiotics against ESBL-positive strains were determined by E-test strips. The β-lactamases involved were characterized by polymerase chain reaction assays and DNA sequencing. Conjugation experiments were done and ISEcp1 elements were tested among CTX-M positive isolates. The prevalence of ESBL was 25.6% (110/430) and all ESBL-positive isolates were sensitive to imipenem and tigecycline; however, the resistance rate to gentamicin, amikacin, and ciprofloxacin was 87.3%, 10%, and 9.1%, respectively. Of these, 89.1% produced SHV, 70.9% produced TEM, and 36.4% were CTX-M-producing strains. The prevalence of ESBL SHV SHV-12 and SHV-5 was of 60% and 18.2%, respectively, and various non-ESBL SHV, including SHV-1 (5.5%), -11 (3.6%), and -85 (1.8%), was detected. However, the prevalence of CTX-M-15 and CTX-M-14 was 34.5% and 1.8%, respectively. ISEcp1 element was detected in 60% of bla(CTX-M-15) genes. All bla(CTX-M) genes were transferable; however, most of bla(SHV-12) and bla(SHV-5) were not transferable. TEM-type ESBLs were not detected in any of the isolates. This is the first description of CTX-M-14, SHV-5, SHV-11, and SHV-85 in Saudi Arabia. We have documented the dominance of K. pneumoniae SHV-12 and highlighted the emergence of CTX-M-15 in Saudi Arabia.
Abdulkader F Tawfik; Abdulaziz M Alswailem; Atef M Shibl; Mohamed H M Al-Agamy
Related Documents :
22060579 - Tyramine degradation by micrococci during ripening of fermented sausage.
21911459 - The capsule of porphyromonas gingivalis leads to a reduction in the host inflammatory r...
3328889 - Classification of the legionellae.
21732689 - Structure-guided design of cell wall biosynthesis inhibitors that overcome β-lactam res...
25147469 - Status of the enigmatic oriental genus rhithrogeniella ulmer, 1939 (ephemeroptera, hept...
18077629 - Molecular and phenotypic data supporting distinct species statuses for scedosporium api...
22844699 - Prevalence of antibiotic resistance genes in staphylococci isolated from ready-to-eat m...
7607519 - New restriction endonucleases from thermophilic soil bacteria.
8290899 - Epidemiology and sensitivity of 8625 icu and hematology/oncology bacterial isolates in ...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-25
Journal Detail:
Title:  Microbial drug resistance (Larchmont, N.Y.)     Volume:  -     ISSN:  1931-8448     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508567     Medline TA:  Microb Drug Resist     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1 Department of Pharmaceutics and Microbiology, College of Pharmacy, King Saud University , Riyadh, Saudi Arabia .
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Molecular Mechanisms of Tetracycline and Macrolide Resistance and emm Characterization of Streptococ...
Next Document:  Molecular Characterization of Vancomycin-Resistant Enterococci in a Chinese Hospital Between 2003 an...