Diversity of β-lactam resistance genes in gram-negative rods isolated from a municipal wastewater treatment plant

Annals of Microbiology

Table 2 Percentage (%) of phenotypically unsusceptible strains of Enterobacteriaceae and Acinetobacter sp. isolated from influent, bioreactor and effluent of UWTP

Sampling point	CTX	CAZ	FEP	ATM	ERT	IMP	MEM	CIP	TE	C	CN	AK	MDR > 3
Influent	72 a	88 a	48 a	80 a	0 a	0 a	0 a	16 a	44 a	28 a	32 a	4 a	48 a
Bioreactor	95 ab	90 a	35 a	90 a	55 b	50 b	65 b	20 a	35 a	15 a	15 a	0 a	30 b
Effluent	100 b	100 a	67 a	67 a	22 ab	44 ab	22 ab	22 a	44 a	11 a	22 a	22 a	44 b
Summary	87	91	46	81	24	26	28	19	41	20	24	6	41

Values within a column marked with different letters are significantly different (p < 0.05)
CTX cefotaxime, CAZ ceftazidime, FEP cefepime, AZT aztreonam, ERT ertapenem, IMP imipenem, MEM meropenem, CIP ciprofloxacin, TET tetracycline, C chloramphenicol, CN gentamicin, AK amikacin, MDR multidrug resistance strains

ISSN: 1869-2044