Table 2.
Characteristic | Community-associated | Hospital-associated | Comment |
---|---|---|---|
mecA | present | present | Encodes for PBP2a |
SCCmecA | IV and V Relatively small ~ 20 kb |
I, II, III Relatively large > 30 kb Carry additional resistance genes |
USA300 most common CA clone |
Resistance pattern | Resistant to: Oxacillin and other β-lactam agents | Resistant to: Oxacillin and other β-lactam agents Resistant to: Rifampin Gentamicn Erythromycin Tetracycline Clindamycyin Trimethorpim sulfamethoxazole |
CA strains increasingly resistant |
Note: SCC staphylococcal chromosomal cassette, CA community-acquired