Microbiology of Foods
Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show

none of these
catalase activity
coagulase activity
protease activity

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Microbiology of Foods
Examination of the presence / absence of organisms refers to

incubation of a food suspension in an enrichment medium followed by inoculation on to a non-selective medium.
incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
None of these
incubation of a food suspension in an enrichment medium

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