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

catalase activity
none of these
protease activity
coagulase activity

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Microbiology of Foods
Which of the following is not true for the thermal resistance of the bacterial cells?

Cells low in lipid content are harder to kill than other cells
Higher the optimal and maximal temperatures for growth, higher the resistance
Cocci are usually more resistant than rods
Bacteria that clump considerably or form capsules are difficult to kill

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Microbiology of Foods
Which of the following is true about ISO 2002 method for Salmonella detection?

Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)
XLD is the first isolation medium rather than BGA
Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth
All of these

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Microbiology of Foods
Enumeration of microorganism refers to

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

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