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Molecular characterization of extended-spectrum beta-lactamases (ESBLs) produced by clinical isolates of Acinetobacter baumannii in Saudi Arabia

Overview of attention for article published in Annals of Clinical Microbiology and Antimicrobials, August 2015
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Title
Molecular characterization of extended-spectrum beta-lactamases (ESBLs) produced by clinical isolates of Acinetobacter baumannii in Saudi Arabia
Published in
Annals of Clinical Microbiology and Antimicrobials, August 2015
DOI 10.1186/s12941-015-0098-9
Pubmed ID
Authors

Essam J. Alyamani, Mohamed A. Khiyami, Rayan Y. Booq, Basel M. Alnafjan, Musaad A. Altammami, Fayez S. Bahwerth

Abstract

Acinetobacter baumannii is a common opportunistic pathogen that causes major nosocomial infections in hospitals. In this study, we hypothesized a high prevalence of A. baumanni ESBL (extended-spectrum beta-lactamase) among all collected isolates. A. baumannii isolates (n = 107) from ICU (Intensive care unit) of local hospitals in Makkah were phenotypically and genotypically characterized. The identity and antibiotic susceptibility of A. baumannii strains were determined using the Vitek-2 system. The identified ESBL producers were further analyzed by PCR and sequencing followed by MLST typing. bla TEM , bla SHV , and the bla CTX-M-group genes 1, 2, 8, 9, and 25 were investigated. Furthermore, bla OXA51-like and bla OXA23-like genes were also examined in the carbapenem-resistant A. baumannii isolates. Our data indicated a high prevalence of A. baumannii ESBL producers among the collected strains. Of the 107 A. baumannii isolates, 94 % were found to be resistant to cefepime and ceftazidime, and aztreonam using the Vitek 2 system. The genes detected encoded TEM, OXA-51-like and OXA-23-like enzymes, and CTX-M-group proteins 1, 2, 8, 9, and 25. MLST typing identified eight sequence type (ST) groups. The most dominant STs were ST195 and ST557 and all of them belong to worldwide clonal complex (CC) 2. This study has shown that there is a high prevalence of antimicrobial resistance in A. baumannii. The diversity of STs may suggest that new ESBL strains are constantly emerging. The molecular diversity of the ESBL genes in A. baumannii may have contributed to the increased antimicrobial resistance among all isolates.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 98 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Malaysia 1 1%
Unknown 97 99%

Demographic breakdown

Readers by professional status Count As %
Student > Master 19 19%
Student > Ph. D. Student 12 12%
Student > Bachelor 8 8%
Researcher 8 8%
Student > Postgraduate 8 8%
Other 18 18%
Unknown 25 26%
Readers by discipline Count As %
Immunology and Microbiology 22 22%
Agricultural and Biological Sciences 14 14%
Biochemistry, Genetics and Molecular Biology 14 14%
Medicine and Dentistry 11 11%
Computer Science 2 2%
Other 5 5%
Unknown 30 31%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 14 November 2015.
All research outputs
#13,751,621
of 22,824,164 outputs
Outputs from Annals of Clinical Microbiology and Antimicrobials
#259
of 608 outputs
Outputs of similar age
#130,087
of 265,958 outputs
Outputs of similar age from Annals of Clinical Microbiology and Antimicrobials
#3
of 6 outputs
Altmetric has tracked 22,824,164 research outputs across all sources so far. This one is in the 38th percentile – i.e., 38% of other outputs scored the same or lower than it.
So far Altmetric has tracked 608 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.3. This one has gotten more attention than average, scoring higher than 56% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 265,958 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 50% of its contemporaries.
We're also able to compare this research output to 6 others from the same source and published within six weeks on either side of this one. This one has scored higher than 3 of them.