“…Mutations in sarA decrease S. aureus biofilm and increase antibiotic susceptibility both in vitro and in vivo (31,57), whereas mutations in mecA, which encodes penicillin binding protein 2a, impede resistance to -lactam antibiotics (58). Several other genes identified in our screen have also been associated with biofilm formation (codY), -lactam resistance (fmtC and vraR), or both processes (rsbU, rsbW, fmtA, and rsh) (4,10,16,(33)(34)(35)(36)(37)(38)(39). In addition, two genes (ilvE and fmtA) were previously shown to be induced by cell wall stress (36), and four genes (sarA, atl, codY, and rsbU) were specifically shown to limit biofilm in strain USA300 (38).…”