Antimicrobial resistance patterns and biofilm formation of coagulase-negative Staphylococcus species isolated from subclinical mastitis cow milk samples submitted to the Onderstepoort Milk Laboratory

Table 4 Antimicrobial resistance pattens of Staphylococcus chromogenes isolated from cow milk samples at the Onderstepoort milk laboratory, 2017

Group	Antimicrobial	AMR-S. chromogenes^b (n = 100)			MDR-S. chromogenes^c (n = 52)
Group	Antimicrobial	Percentage	95%	CI^a	Percentage	95%	CI^a
Lincosamide	Clindamycin	14	9	22	25	15	38
Penicillins	Penicillin	63	53	72	87	75	93
	Ampicillin	66	56	75	87	75	93
	Cloxacillin	14	9	22	25	15	38
Tetracyclines	Oxytetracycline	6	3	12	12	5	23
Phenicols	Chloramphenicol	4	2	10	8	3	18
flouroquinolone	Ciprofloxacin	4	2	10	6	2	16
Cephalosporin	Cefoxitin	6	3	12	12	5	23
Glycopeptide	Vancomycin	11	6	19	19	11	32
Aminoglycoside	Streptomycin	34	25	44	54	41	67
Macrolide	Erythromycin	54	44	63	69	56	80

^a95% CI = 95% confidence interval
^bAMR- S. chromogenes = S. chromogenes resistant to at least one antimicrobial
^cMDR- S. chromogenes = Multidrug resistance S. chromogenes

ISSN: 1746-6148