Molecular characteristics of extended-spectrum β-lactamases in clinical isolates of Enterobacteriaceae from the Philippines

► We investigated ESBLs in Enterobacteriaceae from the Philippines. ► Association between ESBL and plasmid-mediated quinolone resistance genes. ► We identified blaCTX-M, aac(6′)-Ib-cr, and qnr. ► Significant association between blaCTX-M-15 and aac(6′)-Ib-cr.