Research Article

Prevalence of Panton-Valentine Leukocidin Gene among Community Acquired Staphylococcus aureus: A Real-Time PCR Study

Table 2

Biochemical identification and characterization of S. aureus.

TestsSource of the isolatesTotal
Superficial infection siteNasal swab
No (%)No (%)No (%)

Colony pigment
 White01(20)2 (11.8)3 (14)
 Creamy1 (20)3 (17.6)4 (18)
 Yellow3 (60)12 (70.6)15 (68)
Gram Stain5 (100)17 (100)22 (100)
Catalase activity5 (100)17 (100)22 (100)
Coagulase activity5 (100)15 (88)20 (91)
Tnase activity4 (80)1 (06)5 (23)
Mannitol fermentation with high salt concentration5 (100)17 (100)22 (100)
Gelatinase activity4 (80 )16 (94)20 (91)
Protease activity3 (60 )12 (71)15 (68)
Urease activity4 (80 )15 (88)19 (86)
Lipase production 2 ( 40)10 (59)12 (55)
Esculin hydrolysis1 (10)5 (29)5 (27)

Positive number, percentage is presented in parenthesis.