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. 2018 Feb 22;56(3):e01788-17. doi: 10.1128/JCM.01788-17

TABLE 2.

Culture characteristics

Culture characteristics No. (%)
Specimen Gram stain
    Polymorphonuclear leukocytes
        None 34 (49)
        Rare/few 21 (30)
        Moderate/abundant 15 (21)
    Gram-positive cocci present 42 (60)
    PMNs and Gram-positive cocci present 22 (31)
Βeta-hemolysis on blood agar 78 (96)
Method of SIG identification
    Phenotypic 29 (36)
        Errors in initial identification 6 (21)
    MALDI-TOF MSa 52 (64)
        Errors in initial identification 0 (0)
PYRb
    Positive 26 (96)
    Negative 1 (4)
Staphylococcal latex agglutination
    Positive 6 (15)
    Negative 19 (47.5)
    Questionable 15 (37.5)
a

Matrix-assisted laser desorption ionization–time of flight mass spectrometry with Bruker Biotyper.

b

Pyrrolidonyl arylamidase.