Food Microbiology and Contamination Questions and Answers – Foodborne Intoxication – Botulism, Alfatoxicosis and Ergotism

This set of Food Microbiology and Contamination Multiple Choice Questions & Answers (MCQs) focuses on “Foodborne Intoxication – Botulism, Alfatoxicosis and Ergotism”.

1. What genus of bacteria causes botulism?
a) Escherichia
b) Salmonella
c) Vibrio
d) Clostridium
View Answer

Answer: d
Explanation: Clostridium botulinum is a rod-shaped, anaerobic bacterium. It has the ability to form spores and the neurotoxin botulinum.

2. Botulism is named after ________
a) Ham
b) Sausages
c) Beef
d) Mutton
View Answer

Answer: b
Explanation: Botulism is named after the Latin word for sausage, botulus. This is because the first reliable case of botulism was caused by spoiled sausages in Germany.

3. Botulism toxins are _________
a) Neurotoxins
b) Cytotoxins
c) Myotoxins
d) Endotoxins
View Answer

Answer: a
Explanation: Botulism toxins are neurotoxins. They act on the peripheral nervous system through the cholinergic nerves.

4. Difficulty in swallowing is also called __________
a) Dysphonia
b) Dysphagia
c) Dyspnea
d) Dystonia
View Answer

Answer: b
Explanation: Botulinum toxins cause difficulty in swallowing by attacking the muscles controlling the process. This is a side effect of Botox as well.

5. Botulism toxins cause flaccid paralysis.
a) True
b) False
View Answer

Answer: a
Explanation: The botulism toxins travel up to the bloodstream through the lymphatics. They bind to the nerve ending of a muscle-nerve junction. This blocks the production of acetylcholine which transmits stimuli. Hence, it gives rise to flaccid paralysis.

6. Mycotoxins are produced by ______
a) Bacteria
b) Viruses
c) Protozoa
d) Fungi
View Answer

Answer: d
Explanation: Some molds produce enzymes and toxins called mycotoxins using food as a substrate. These chemicals can cause a wide variety of diseases, ranging from food poisoning to cancer.

7. Aflatoxins are produced by ________
a) Penicillium
b) Aspergillus
c) Saccharomyces
d) Rhizobium
View Answer

Answer: b
Explanation: Aspergillus flavus produces toxins known as aflatoxins. These are highly carcinogenic in case of rats. They exhibit fluorescence under UV lights.

8. Aflatoxin B1 epoxide reacts with ______ residues of DNA.
a) Guanine
b) Adenine
c) Cytosine
d) Thymine
View Answer

Answer: a
Explanation: The toxin acts on the p53 gene. This gene has an anti-cancer function. Also, the hepatitis B virus binds to the product of the same gene. Hence, this could prove to be either a boon or a bane.

9. Ergotism is caused due to ________
a) Aspergillus niger
b) Penicillium notatum
c) Saccharomyces cerevisiae
d) Claviceps purpurea
View Answer

Answer: d
Explanation: This fungus grows on rye and other such cereal crops. The alkaloid ergotamine causes hallucinations. Nausea. Uterine contractions etc.

10. Ergotism is also called _________
a) St. Xavier’s fire
b) St. Anthony’s fire
c) St. Paul’s fire
d) St. Matthew’s fire
View Answer

Answer: b
Explanation: Ergotism was called St. Anthony’s Fire as the Monks of the Order of St. Anthony were successful in curing this disease when it was rampant in the Middle Ages.

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.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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