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Frequency of ESBLs and AmpC β-lactamases, among different Gram-negative pathogens collected from patients at King Abdullah Hospital, Bisha, Saudi Arabia. ∗Morganella morganii (n = 5), Klebsiella oxytoca (n = 4), Serratia marcescens (n = 4), Providencia rettgeri (n = 4), Citrobacter freundii (n = 3), Salmonella enterica (n = 2), and Proteus vulgaris (n = 1).
