Occurrence of β-Lactamase-Producing Gram-Negative Bacterial Isolates in Water Sources in Cali City, Colombia

Table 3

Susceptibility profile and distribution of antibiotypes of Gram-negative bacteria isolated from artificial and natural waters.

Ant	Sampling site												Profile
	Isolates		A		B		C		D		E		Resistance	Sensitivity
	DS n (%)	WS n (%)	DS n (%)	WS n (%)	DS n (%)	WS n (%)	DS n (%)	WS n (%)	DS n (%)	WS n (%)	DS n (%)	WS n (%)
1	10 (12.2)	13 (14.8)	1 (5.3)	—	3 (23.1)	6 (27.3)	—	—	4 (26.7)	3 (60)	2 (14.3)	4 (33.3)	FOX, CTX, CAZ, TZP, MEM, STX, CIP, GEN	—
2	10 (12.2)	29 (33)	3 (15.8)	7 (36.8)	2 (15.4)	12 (54.5)	3 (15.8)	6 (27.3)	1 (6.7)	1 (20)	1 (7.1)	3 (25)	FOX, CTX, STX/CIP	CAZ, TZP, MEM, GEN
3	42 (51.2)	43 (48.9)	8 (42.1)	12 (63.2)	5 (38.5)	4 (18.2)	13 (68.4)	21 (70)	8 (53.3)	1 (20)	8 (57.1)	5 (41.7)	FOX, CTX, CAZ, STX, CIP, TZP/MEM	GEN
4	18 (22)	3 (3.4)	7 (36.8)	—	3 (23.1)	—	3 (15.8)	3 (10)	2 (13.3)	—	3 (21.4)	—	—	FOX, CTX, CAZ, TZP, MEM, STX, CIP, GEN
Total	80	88	19 (23.8)	19 (21.6)	13 (16.3)	22 (25)	19 (23.8)	30 (34.1)	15 (18.8)	5 (5.7)	14 (17.5)	12 (13.6)

Trimetroprim/sulfametoxazol (SXT), gentamicin (GEN), ciprofloxacin (CIP), ceftazidime (CAZ), cefoxitin (FOX), cefotaxime (CTX), meropenem (MEM), piperacillin/tazobactam (TZP); wastewater treatment plant (A), rainwater channel (B), Intersector Canal (CVC) Sur (C), water treatment plant “Puerto Mallarino” (D), and Melendez River (E). DS: dry season, WS: wet season; Ant: antibiotype.