Isolation and Antimicrobial Susceptibility Profile of Escherichia coli O157 : H7 from Raw Milk of Dairy Cattle in Holeta District, Central Ethiopia

Table 1

Antibiotic disk used to test E. coli O157: H7 and their respective concentrations.

Drugs	Disc code	Concentration (μg)	Resistant	Intermediate	Susceptible
Streptomycin	S	10	≤11	12–14	≥15
Sulfamethoxazole	RL	100	≤12	13–16	≥17
Cefoxitin	CF	30	≤14	15–17	≥18
Tetracycline	TE	30	≤11	12–14	>15
Oxytetracycline	OT	30	≤11	12–14	≥15
Vancomycin	VA	30	≤15	—	>15
Ciprofloxacin	CIP	5	≤15	16–20	≥21
Trimethoprim	TR	5	≤10	11–15	≥16
Cloxacillin	OB	5	≤10	11–12	>13
Gentamycin	GEN	10	≤12	13–14	>15
Chloramphenicol	C	30	≤12	13–17	≥18