staphylococci staphylococci Staphylococcus-facultatively anaerobic,gram- positive,usually form irregular clusters,nonmotile, catalase positive but oxidase negative,ferment glucose anaerobicallyStaphylococcus - facultatively anaerobic, gram￾positive, usually form irregular clusters, nonmotile, catalase positive but oxidase negative, ferment glucose anaerobically. staphylococci staphylococci