Frequency of Detection of Escherichia coli, Salmonella spp., and Campylobacter spp. in the Faeces of Wild Rats (Rattus spp.) in Trinidad and Tobago

Table 3

Frequency of resistance to antimicrobial agents amongst zoonotic bacteria tested.

Type of bacteria	Number of isolates tested	Number (%) of resistant isolates^a	Number (%) of isolates resistant to:
			KF^b	CN	SXT	AMP	K	S	NA	TE	C
Escherichia coli	171	62 (36.3)	0 (0.0)	6 (3.5)	10 (5.8)	27 (15.8)	6 (3.5)	0 (0.0)	9 (5.3)	31 (18.1)	14 (8.2)
Salmonella spp.	4	3 (75.0)	0 (0.0)	0 (0.0)	0 (0.0)	1 (25.0)	0 (0.0)	0 (0.0)	1 (25.0)	1 (25.0)	1 (25.0)
Campylobacter spp.	7	6 (85.7)	5 (71.4)	3 (42.9)	5 (71.4)	1 (14.3)	4 (57.1)	5 (71.4)	5 (71.4)	2 (28.6)	1 (14.3)
Total	182	71 (39.0)	5 (2.7)	9 (4.9)	15 (8.2)	29 (15.9)	10 (5.5)	5 (2.7)	15 (8.2)	34 (18.7)	16 (8.8)

^aResistant to one or more antimicrobial agents.
^bKF-Cephalothin (30 μg), CN-Gentamicin (10 μg), SXT-Sulphamethoxazole/trimethoprim (23.25 μg, 1.75 μg), AMP-Ampicillin (10 μg), K-Kanamycin (30 μg), S-Streptomycin (10 μg), NA-Nalidixic acid (30 μg), TE-Tetracycline (30 μg), C-Chloramphenicol (30 μg).