Abstract
Bowel carriage has been identified as the main reservoir of extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-PE) and hospital-acquired infections. There are gaps in the knowledge of trends of these rates, which need to be filled for the development and implementation of hospital surveillance systems and antibiotic stewardship programmes in Nigeria. This study investigated the carriage rates of ESBL-PE among 273 children admitted to the paediatric wards of a university teaching hospital, Nigeria, using a prospective cohort study design over a 6-month period. The study explored the role of new and transferred patients in introducing resistant strains of ESBLs into paediatric wards and how quickly paediatric patients that were previously free of resistant strains acquired these within the hospital environment. E-swabs (Copan Diagnostics, Italy) were used to obtain rectal samples from participants. Positive colonies were Gram stained and subcultured onto purity plates for further identification, and antibiotic susceptibility pattern of identified ESBL-PE was obtained using a range of antibiotics. Data were analysed using SPSS statistics 20 (IBM SPSS Statistics, version 20). Statistical significance was determined using the Chi-square test and Fisher's exact test. A logistic regression analysis was also conducted to identify independent risk factors for colonisation. The findings showed that transferred patients contributed to the introduction of ESBLs into the hospital. Independent multivariate risk factors for colonisation of ESBL-PE were age >10-14 years, instrumentation (odds ratio [OR]: 0.2 [P < 0.05]) and sharing of thermometers (OR: 0.11 [P < 0.05]). The carriage rate of ESBL-PE is high (25.3%) among children, and none-carriers may become colonised within 14 days of hospitalisation.
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