“…Most studies in Nigeria have reported different carbapenem resistance genes from other Enterobacteriaceae. [20,27,28] reported blaNDM-5, blaOXA-48 and blaOXA-181 as the commonest carbapenemase genes in Nigeria. Our finding may however suggest that the resistance to meropenem could be due to other mechanisms such as efflux pump, decreased outer membrane permeability, porin loss or presence of β-lactams genes, as this was supported by previous studies where blaKPC was not detected in K. pneumoniae isolates [29,30].…”