This set of Food Microbiology and Contamination Multiple Choice Questions & Answers (MCQs) focuses on “Staphylococcal Intoxication”.
1. The name Staphylococcus has _______ origins.
a) Greek
b) French
c) Danish
d) Polish
View Answer
Explanation: A Scottish surgeon first described Staphylococcus as the cause of pus-forming infections in humans. He coined the name in 1882 after their appearance under the microscope. In Greek, Staphyle is a bunch of grapes whereas coccus is a grain or a berry.
2. Staphylococcus aureus is a ________
a) Thermophile
b) Mesophile
c) Psychrophiles
d) Thermoacidophiles
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Explanation: The temperature range this organism grows at is moderate and hence, the organism is a mesophile. It operates under a temperature range of 280-321 K.
3. Staphylococcus aureus enterotoxins are superantigens.
a) True
b) False
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Explanation: These toxins are able to get the body to produce a larger percentage of T cells than any other conventional organisms. Hence the reason.
4. Staphylococcus aureus toxins are _________
a) Myotoxins
b) Necrotoxins
c) Cytotoxins
d) Neurotoxins
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Explanation: The toxins work on the gut receptors, sending signals to the vomiting centre in the brain through nerves. Hence, these are neurotoxins.
5. Coagulase can cause the coagulation of blood plasma even without _______
a) Potassium
b) Iron
c) Calcium
d) Magnesium
View Answer
Explanation: Coagulase is an extracellular substance which can be produced by Staphylococcus aureus. Its presence can be detected by EDTA kits.
Sanfoundry Global Education & Learning Series – Food Microbiology and Contamination.
To practice all areas of Food Microbiology and Contamination, here is complete set of Multiple Choice Questions and Answers.
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