Assessment of Staphylococcus aureus along milk value chain and its public health importance in Sebeta, central Oromia, Ethiopia

Table 2 Antimicrobial susceptibility profile of S. aureus isolates according to the types of samples

Antimicrobial	Unit	Type of samples susceptible to different antimicrobial agents
		Farm milk (n = 41) No (%)			Milker’s Hand swabs (n = 8) No (%)			Milking bucket swab (n = 3) No (%)			MCCs (n = 16) No (%)
		R	I	S	R	I	S	R	I	S	R	I	S
Ciprofloxacin	5 μg	3 (7.3)	5 (12.2)	33 (80.5)	4 (50)	0 (0.0)	4 (50)	0 (0.0)	0 (0.0)	3 (100)	0 (0.0)	0 (0.0)	16 (100)
Nalidixic acid	30 μg	8 (19.5)	23 (56.1)	10 (24.4)	2 (25)	0 (0.0)	6 (75)	0 (0.0)	2 (66.7)	1 (33.3)	2 (12.5)	2 (12.5)	12 (75)
Vancomycin	30 μg	26 (63.4)	0 (0.0)	15 (36.6)	4 (50)	0 (0.0)	4 (50)	2 (66.7)	0 (0.0)	1 (33.3)	12 (75)	0 (0.0)	4 (25)
Penicillin G	10 units	41 (100)	0 (0.0)	0 (0.0)	8 (100)	0 (0.0)	0 (0.0)	2 (66.7)	0 (0.0)	1 (33.3)	16 (100)	0 (0.0)	0 (0.0)
Amoxicillin	30 μg	25 (60.9)	8 (19.5)	8 (19.5)	8 (100)	0 (0.0)	0 (0.0)	2 (66.7)	1 (33.3)	0 (0.0)	12 (75)	2 (12.5)	2 (12.5)
Cefoxitin	30 μg	41 (100)	0 (0.0)	0 (0.0)	8 (100)	0 (0.0)	0 (0.0)	3 (100)	0 (0.0)	0 (0.0)	16 (100)	0 (0.0)	0 (0.0)
Streptomycin	10 μg	36 (87.8)	0 (0.0)	5 (12.2)	4 (50)	4 (50)	0 (0.0)	3 (100)	0 (0.0)	0 (0.0)	10 (62.5)	0 (0.0)	6 (37.5)
Erythromycin	15 μg	28 (68.3)	5 (12.2)	8 (19.5)	4 (50)	0 (0.0)	4 (50)	3 (100)	0 (0.0)	0 (0.0)	12 (75)	2 (12.5)	2 (12.5)
SXT	25 μg	15 (36.6)	0 (0.0)	26 (63.4)	4 (50)	0 (0.0)	4 (50)	1 (33.3)	0 (0.0)	2 (66.7)	2 (12.5)	0 (0.0)	14 (12.5)
Tetracycline	30 μg	28 (68.3)	0 (0.0)	13 (31.7)	8 (100)	0 (0.0)	0 (0.0)	2 (66.7)	0 (0.0)	1 (33.3)	6 (37.5)	0 (0.0)	10 (62.5)

Key: I Intermediate, MCCs Milk collection centers, n number of S. aureus isolated, No number of S. aureus showing resistance, intermediate or susceptible to antimicrobials tested, R Resistant, S Susceptible, SXT Sulphamethoxazole-Trimethoprim

ISSN: 1471-2180