Antibiotic Resistance Profile of Bacteria Isolated from Wastewater Systems in Eastern Ethiopia

Table 5

Antibiotic resistance among isolates of environmental resistance indicator bacterial species by monitoring site.

Site	Resistance phenotype	No. tested	Number and (%) resistant to antibiotic tested										MARI mean (SD)
			AMP	AMC30	CAZ30	CFP	GEN10	AMIK	LVL5	CIP5	MRP10	SxT25
ASS	E. coli	61	29 (47.5)	28 (45.9)	30 (49.2)	19 (31.2)	10 (16.4)	13 (21.3)	14 (22.9)	17 (27.87)	11 (18)	15 (24.6)	0.30 (0.03)
	E. faecalis	60	26 (43.3)	–	–	–	8 (13.3)	–	13 (21.6)	15 (25)	–	16 (26.7)	0.26 (0.03)
	E. faecium	58	25 (43.1)	–	–	–	11 (18.9)	–	12 (20.7)	15 (25.9)	–	18 (31)	0.28 (0.04)
	P. aeruginosa	59	–	–	25 (42.37)	23 (39)	12 (20.3)	12 (20.3)	12 (20.3)	16 (27.1)	11 (18.6)	–	0.27 (0.03)
	Aeromonas spp.	58	–	–	19 (32.8)	21 (36.2)	–	–	12 (20.7)	17 (29.31)	–	24 (41.4)	0.32 (0.04)
WSP	E. coli	52	28 (53.8)	25 (48.1)	27 (51.9)	19 (36.5)	13 (25)	14 (26.9)	17 (32.7)	19 (36.54)	15 (28.9)	15 (28.9)	0.37 (0.03)
	E. faecalis	48	26 (54.2)	–	–		11 (22.9)	–	14 (29.2)	17 (35.4)	–	17 (35.4)	0.35 (0.03)
	E. faecium	48	23 (47.9)	–	–		11 (22.9)	–	13 (27.1)	17 (35.4)	–	21 (43.7)	0.35 (0.03)
	P. aeruginosa	48	–	–	24 (50)	20 (41.7)	9 (18.75)	48 (29.2)	14 (29.2)	15 (31.3)	13 (27.1)	–	0.32 (0.04)
	Aeromonas spp.	48	–	–	16 (33.3)	19 (39.6)	–	–	13 (27.1)	18 (37.5)	–	29 (60.4)	0.40 (0.04)
STS	E. coli	38	36 (94.7)	30 (78.9)	33 (86.8)	31 (81.6)	15 (39.5)	17 (44.7)	21 (55.26)	19 (50)	16 (42.1)	29 (76.32)	0.65 (0.03)
	E. faecalis	36	33 (91.7)	–	–		13 (36.1)	–	19 (52.8)	21 (58.3)	–	22 (61.1)	0.60 (0.04)
	E. faecium	36	32 (88.9)	–	–		18 (50)	–	23 (63.9)	23 (63.9)	–	27 (75)	0.68 (0.04)
	P. aeruginosa	36	–	–	28 (77.8)	28 (77.8)	16 (44.4)	17 (47.2)	17 (47.22)	21 (58.3)	17 (47.2)	–	0.57 (0.03)
	Aeromonas spp.	36	–	–	26 (72.2)	29 (80.6)	–	–	19 (52.8)	25 (69.4)	–	25 (69.4)	0.69 (0.4)

ASS: activated sludge system, WSP: waste stabilization pond, STS: septic tank system, AMP: ampicillin, AMC30: amoxicillin/clav, CAZ30: ceftazidime, CFP, cefepime, GEN10: gentamicin, AMIK: amikacin, LVL5: levofloxacin, CIP5: ciprofloxacin, MRP10: meropenem, SxT25: Co-Trimoxazole.