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

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Microbiology of Foods
Enumeration of microorganism refers to

None of these
either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test
non-selective plating, depending on the test
either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar

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