Abstract
This study investigated the prevalence of Klebsiella (K.) pneumoniae isolates among clinical samples of patients in four medical centers in Lagos, Nigeria and the burden of extended-spectrum beta-lactamases (ESBL) and carbapenem-resistant K. pneumoniae (CRKP) strains. Different samples (stool, blood, urine, wound swabs and nasal swabs) from 127 patients with suspected Gram-negative infections based on on-site performed Gram-stain from four public hospitals between March and September 2015 were analyzed. K. pneumoniae was identified in 43 (34%) patients. Resistance rates of these 43 strains according to the CLSI breakpoints were as followed: cotrimoxazole (90.7%), cefuroxime (74.4%), ofloxacin (55.8%), ceftazidime (46.5%), and cefixime (35%). Three isolates (7%) were resistant to imipenem. All isolates were susceptible to amoxicillin/clavulanic acid and nitrofurantoin. The prevalence of ESBL-producing, MDR and CRKP strains was 69.8%, 62.8%, and 7.0%, respectively. Of the ESBL-producing isolates, two K. pneumoniae isolates obtained from urine harbored both blaSHV and blaCTX-M-1, and a third isolate from urine harbored only the blaCTX-M-1. This study revealed the emergence of CRKP isolates and blaCTX-M-1 and blaSHV co-harboring K. pneumoniae strains in Lagos hospitals. The emergence of CRKP strains is an early warning signal for carbapenem antibiotics’ prudent use with concern for their efficacies.
Highlights
Klebsiella (K.) pneumoniae is a Gram-negative opportunistic nosocomial bacterial pathogen.It is involved in several localized and disseminated hospital-acquired infections such as burns infections, sepsis, respiratory and gastrointestinal tract infections, urinary tract infections, pyogenic liver abscesses, and soft tissue and wound infection [1]
Klebsiella pneumoniae was isolated from 34% (43/127) of clinical samples analyzed in this study
K. pneumoniae was present in about half (55.8%) of urine samples screened, an indication of etiological diagnosis in urinary tract infections, as no other bacterial pathogens were isolated
Summary
Klebsiella (K.) pneumoniae is a Gram-negative opportunistic nosocomial bacterial pathogen. It is involved in several localized and disseminated hospital-acquired infections such as burns infections, sepsis, respiratory and gastrointestinal tract infections, urinary tract infections, pyogenic liver abscesses, and soft tissue and wound infection [1]. K. pneumoniae that can drive carbapenem resistance; KPC-2 production is just one. A few years later, outbreaks began to appear in several countries. Nowadays, it is the most common carbapenemase-producing Enterobacterales (CPE), and is considered one of the most rapidly growing global threats due to the high mortality in hospital-associated infections [4].
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