Food Microbiology and Contamination Questions and Answers – Salmonellosis and Toxoplasmosis

This set of Food Microbiology and Contamination Multiple Choice Questions & Answers (MCQs) focuses on “Salmonellosis and Toxoplasmosis”.

1. Salmonella cells are __________
a) Gram positive and sporulating
b) Gram negative and sporulating
c) Gram positive and nonsporulating
d) Gram negative and nonsporulating
View Answer

Answer: d
Explanation: These rod-shaped bacterial cells are Gram negative and nonsporulating. They are facultative anaerobes and are motile.

2. The bacterial cells cause infection in the ________
a) Stomach
b) Small intestine
c) Large intestine
d) Pancreas
View Answer

Answer: b
Explanation: The Salmonella cells attack the small intestine and produce toxins in the mucosa. This leads to the inflammation of the intestine and further gastrointestinal problems.

3. Toxoplasmosis is caused by a __________
a) Bacterium
b) Virus
c) Protozoan
d) Fungus
View Answer

Answer: c
Explanation: Toxoplasmosis is an infectious disease caused by a protozoan, Toxoplasma gondii. It can be classified as a parasitic disease too. The disease can spread through insect bites, blood products or contaminated food and water.

4. _________ are responsible for acute infection.
a) Tachyzoites
b) Bradyzoites
c) Cytozoites
d) Vacuzoites
View Answer

Answer: a
Explanation: Tachyzoites are motile forms of the protozoan. They have the ability to produce tissue cysts during the infection. They enter cells and multiply continuously to fill the host cells with the next generation.

5. Cats are more susceptible to toxoplasmosis than frogs.
a) True
b) False
View Answer

Answer: a
Explanation: Frogs are cold-blooded animals whereas cats are warm-blooded. Toxoplasmosis affects warm-blooded animals. Also, cats are the hosts of this parasite. The parasite’s eggs can only reproduce inside the feline’s body. Hence the reason.

6. A fourfold increase in _______ indicates acute infection.
a) IgM
b) IgG
c) Leukocytes
d) Platelets
View Answer

Answer: b
Explanation: Immunoglobulin G binds and neutralizes toxins. It also activates a pathway used to eliminate pathogens. An increase in this indicates infection. IgG is the most common antibody and it is found in the blood stream.

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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