Objective: Carbapenemase producing Klebsiella pneumoniae is emerging as an important pathogen worldwide which
has alarming clinical threat with serious effects on patients’ outcome. The aim of our study is to determine prevalence
of carbapenemase producing K. pneumoniae and its antibiotic susceptibility pattern in tertiary care hospitals.
Methods: A prospective study was performed on 260 clinical isolates of K. pneumoniae collected from five different
hospitals of Makkah, Saudi Arabia from January to July 2015. All clinical isolates were confirmed as K. pneumoniae using
Vitek 2 system. These isolates were then screened for potential carbapenemase producers by determining reduced
susceptibility to carbapenems using representative antibiotic disks of third generation cephalosporins and carbapenems
in the disk diffusion test following guidelines of Clinical and Laboratory Standards Institute. Minimum inhibitory
concentration of isolates found positive in screening test were determined for cephalosporins, carbapenems, aminoglycosides
and tigecycline and colistin using Vitek-2 system. Modified Hodge test was performed to detect carbapenemase
production on the isolates suspected for carbapenemase production.
Results: Out of 260 K. pneumoniae isolates, 31 (11.9%) have shown 100% resistance to all cephalosporins. Of 31 K.
pneumoniae isolates, 15 (48.4%) were found positive for carbapenemase. All carbapenem resistant isolates were sensitive
to colistin and tigecycline. However, these isolates have shown resistance to amikacin (41.9%) and gentamicin
(51.6%), respectively.
Conclusion: This is the first report from Makkah reporting carbapenamse producing K.pneumoniae. Of 12% potential
carbapenemase producing K.pneumoniae, 48.4% were found positive for carbapenemase production. Molecular characterization
of these strains will help to determine the type of carbapenemase prevalent in this area. J Microbiol Infect
Dis 2016;6(3): 121-127
Subjects | Health Care Administration |
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Journal Section | ART |
Authors | |
Publication Date | September 1, 2016 |
Published in Issue | Year 2016 Volume: 6 Issue: 3 |