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

Table 2

Distribution of Gram-negative bacteria with resistance to antibiotics at the sampling sites during the dry and wet seasons.

Sampling site
Antibiotic	A		B		C		D		E		Total
	DS (%)	WS (%)	DS (%)	WS (%)	DS (%)	WS (%)	DS (%)	WS (%)	DS (%)	WS (%)	DS (%)	WS (%)
FOX	26.7	21.7	13.3	18.8	26.7	42	15	4.3	18.3	13	73.2	78.4
CTX	26.7	31.3	13.3	0	26.7	50	15	9.4	18.3	9.0	73.2	36.4
CAZ	22.4	26	16.3	10	24.5	50	20.4	4	16.3	10	59.8	56.8
TZP	28.8	14.6	11.9	3.6	25.4	50	13.6	3.6	20.3	28.6	72	31.8
MEM	26.8	26.1	12.2	15.9	26.8	42	19.5	2.9	14.6	13	50	78.4
STX	28.6	32.4	17.9	11.8	21.4	41.2	17.9	5.9	14.3	8.8	68.3	38.6
CIP	25.6	30.4	16.3	17.9	23.3	37.5	16.3	5.4	18.6	8.9	52.4	63.3
GEN	31.6	26.9	14	11.5	26.3	38.5	14	0	14	23.1	69.5	29.5

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. .