AlabiO.; ObisesanA.; TaiwoM.; AdewuyiR. CO-PRODUCTION OF EXTENDED-SPECTRUM BETA-LACTAMASES AND METALLO BETA-LACTAMASES AMONG MULTI-DRUG RESISTANT GRAM-NEGATIVE BACTERIA ISOLATES COLLECTED FROM TERTIARY HOSPITALS IN OYO STATE, NIGERIA. FUDMA JOURNAL OF SCIENCES, v. 4, n. 3, p. 230 - 241, 23 Sep. 2020.