Prevalence of colistin resistance in multidrug-resistant Klebsiella pneumoniae recovered from clinical samples in Africa

Abstract

BACKGROUND : Colistin resistance in multidrug-resistant (MDR) Klebsiella pneumoniae is a growing concern in Africa, complicating treatment and public health management. Colistin is a last-resort antibiotic for Gram-negative infections, but its resistance in clinical settings presents significant challenges. This study aims to determine the pooled prevalence of colistin resistance in MDR K. pneumoniae isolates from clinical specimens in Africa. METHODS : Articles were sourced from PubMed, Scopus, ScienceDirect and Google Scholar. Studies included were those reporting colistin resistance in MDR K. pneumoniae from clinical specimens in Africa, using EUCAST and CLSI-standard drug susceptibility testing. Data were extracted into Excel and analysed using STATA 17 with a random-effects model to determine the pooled prevalence. Heterogeneity was assessed using the I2 statistic, and publication bias was checked with Egger’s test. Subgroup analyses were performed to explore heterogeneity. RESULTS : The study analysed data from 30 articles on colistin resistance in MDR K. pneumoniae. The pooled prevalence was 21.59% (95% CI: 12.12–31.06), with high heterogeneity (I2 = 99.71%). Sub-regional variation was significant (P < 0.001), with prevalence rates differing across regions: 42.34% in East Africa, 37.1% in West Africa, 17.1% in Southern Africa and 13.0% in North Africa. Country-specific rates were highest in Nigeria (39.12%), followed by Kenya (22.52%), South Africa (17.12%) and Egypt (14.0%) (P < 0.001). CONCLUSIONS : Colistin resistance in MDR K. pneumoniae is high in Africa, with notable regional differences. The study calls for strict colistin regulations, robust antimicrobial stewardship and rapid diagnostic tools for resistance detection.