Prevalence, molecular epidemiology, and antimicrobial resistance of methicillin-resistant Staphylococcus aureus from swine in southern Italy

Table 3 Resistance to individual antimicrobials in 219 MRSA isolates from pigs

Antimicrobial target	Antimicrobial class	Antimicrobial^a	No. of non-susceptible (R + I) isolates (%)^b
Peptidoglycan synthesis	β-lactams	PEN	219 (100)
		OXA	219 (100)
		AMS	145 (66.2)
	Carbapenems	IMP	22 (10.0)
	Glycopeptides	VAN	0 (0)
DNA synthesis	Fluoroquinolones	ENR	143 (65.3)
DNA synthesis	Fluoroquinolones	MAR	105 (47.9)
Protein synthesis	Aminoglycosides	GEN	43 (19.6)
	Aminoglycosides	KAN	47 (21.5)
	Macrolides	ERY	101 (46.1)
	Lincosamides	CLI	204 (93.1)
	Tetracyclines	TET	219 (100)
	Fucidanes	FUS	0 (0)
	Phenicols	CHL	16 (7.3)
	Ansamycins	RIF	1 (0.5)
Others	Nitrofuranes	NIT	10 (4.6)
Others	Folate pathways inhibitors	SXT	150 (68.4)

^aAcronyms: PEN, penicillin; OXA, oxacillin; AMS, ampicillin/sulbactam; IMP, imipenem; VAN; vancomicin; ENR, enrofloxacin; MAR, marbofloxacin; GEN, gentamycin; KAN, kanamycin; ERY, erythromycin; CLI, clindamycin; TET, tetracycline; FUS, fusidic acid; CHL, chloramphenicol; RIF, rifampicin; NIT, nitrofurantoin; SXT, trimethoprim-sulfamethoxazole
^bIsolates showing resistance (R) and intermediate susceptibility (I) were classified as non-susceptible

ISSN: 1471-2180