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Egyptian Journal of Medical Human Genetics

Table 3 Biochemical characterization of S. aureus isolates

From: Prevalence of enterotoxin genes (SEA to SEE) and antibacterial resistant pattern of Staphylococcus aureus isolated from clinical specimens in Assiut city of Egypt

Name of test No. of isolates  
No %
Catalase Positive for all isolates 100
Coagulase by rabbit plasma
Slide Positive for 25 isolates 54.4
Tube Positive for 21 isolates 45.6
DNase agar Positive for all isolates 100
Crystal violet agar
Purple colonies 39 isolates 84.7
White colonies 3 isolates 6.5
Yellow colonies 4 isolates 8.6
Nitrate reduction Positive for all isolates 100
Baird parker medium Positive for all isolates 100
Indole production test Negative for all isolates 100
Methyl red test Positive for all isolates 100
Voges Prausker test Positive for all isolates 100
Citrate utilization Negative for all isolates 100
Gelatin hydrolysis Positive for all isolates 100
Casein hydrolysis test Positive for all isolates 100
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