Antibiotic Resistance in Staphylococcus aureus and Coagulase Negative Staphylococci Isolated from Goats with Subclinical Mastitis

Table 1

MIC ($\mu$g/mL) of antimicrobials against $S.\mathrm{\hspace{0.17em}\hspace{0.17em}}aureus$ and $CNS$ strains isolated from goats subclinical mastitis.

	S. aureus				CNS
Antimicrobial agents	MIC50	MIC90	mode	range	MIC50	MIC90	mode	range
Ampicillin ${}^{(a)}$	0.12	1.0	$\le$0.06	$\le$0.06–16.0	0.12	4.0	$\le$0.06	$\le$0.06–16.0
Cefoperazone ${}^{(\text{b})}$	2.0	8.0	1.0	1.0–8.0	2.0	4.0	2.0	$\le$0.06–32.0
Ceftriaxone ${}^{(\text{b})}$	4.0	8.0	4.0	1.0–16.0	2.0	8.0	2.0	$\le$0.06–$\ge$128
Cephalothin ${}^{(\text{a})}$	0.25	0.25	0.25	$\le$0.06–$\ge$128	0.25	0.25	0.25	$\le$0.06–16.0
Cloxacillin ${}^{(\text{a})}$	0.25	0.5	0.25	1.0–0.12	0.5	1.0	0.5	$\le$0.06–$\ge$128
Kanamycin ${}^{(\text{a})}$	16.0	$\ge$128	32.0	1.0–$\ge$128	8.0	32.0	16.0	$\le$0.06–$\ge$128
Novobiocin ${}^{(\text{c})}$	0.12	0.5	$\le$0.06	$\le$0.06–0.5	0.12	0.5	$\le$0.06	$\le$0.06–32.0
Ofloxacin ${}^{(\text{b})}$	0.5	1.0	0.5	0.25–2.0	0.5	1.0	0.5	$\le$0.06–32.0
Oxytetracycline ${}^{(\text{a})}$	0.25	64.0	0.25	0.12–$\ge$128	0.25	1.0	0.25	$\le$0.06–$\ge$128
Vancomycin ${}^{(\text{a})}$	2.0	4.0	2.0	0.5–4.0	2.0	4.0	2.0	$\le$0.06–4.0

${}^{(\text{a})}$Breakpoints NCCLS, [19]; $\mathrm{\hspace{0.17em}\hspace{0.17em}}{}^{(\text{b})}$= breakpoints CLSI, [20]; $\mathrm{\hspace{0.17em}\hspace{0.17em}}{}^{(\text{c})}$= breakpoint [21].