Which bacteria are commonly associated with foodborne illnesses?

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microbiology an introduction 13th edition test bank Questions

Question 1 of 5

Which bacteria are commonly associated with foodborne illnesses?

Correct Answer: D

Rationale: The correct answer is D because all three bacteria - Salmonella enterica, Clostridium botulinum, and Escherichia coli - are commonly associated with foodborne illnesses. Salmonella causes gastroenteritis, Clostridium botulinum causes botulism, and E. coli can lead to severe food poisoning. Each bacterium has different mechanisms of causing illness, but all can be transmitted through contaminated food. Choices A, B, and C alone are incorrect because they do not encompass the full spectrum of bacteria commonly linked to foodborne illnesses.

Question 2 of 5

Which bacteria are known to cause food poisoning?

Correct Answer: D

Rationale: The correct answer is D: All of the above. Salmonella enterica, Clostridium botulinum, and Escherichia coli are all bacteria known to cause food poisoning. Salmonella causes symptoms like diarrhea and vomiting; Clostridium botulinum produces a toxin leading to paralysis; Escherichia coli can cause severe stomach cramps and bloody diarrhea. Therefore, selecting "All of the above" is correct because all three bacteria are commonly associated with foodborne illnesses. Choices A, B, and C on their own are incorrect as they each represent only one bacterium known to cause food poisoning, whereas the correct answer encompasses all three.

Question 3 of 5

Which bacteria produce a toxin that causes the disease botulism?

Correct Answer: A

Rationale: The correct answer is A: Clostridium botulinum. This bacterium produces the neurotoxin responsible for botulism. Clostridium perfringens causes gas gangrene, not botulism. Escherichia coli and Salmonella enterica are not associated with botulism. Clostridium botulinum is the only bacterium known to produce the toxin causing botulism.

Question 4 of 5

Which of the following bacteria is known for causing urinary tract infections?

Correct Answer: A

Rationale: The correct answer is A: Escherichia coli. E. coli is the most common bacteria responsible for causing urinary tract infections due to its ability to adhere to the urinary tract lining and multiply rapidly. It is a normal inhabitant of the gut and can enter the urinary tract through improper hygiene practices. Salmonella enterica and Neisseria gonorrhoeae are typically associated with other infections like food poisoning and gonorrhea, respectively. Mycobacterium tuberculosis causes tuberculosis, not urinary tract infections. Thus, based on its prevalence and pathogenicity in the urinary tract, E. coli is the correct choice.

Question 5 of 5

Which bacteria is responsible for causing syphilis?

Correct Answer: A

Rationale: Step 1: Treponema pallidum is a spirochete bacterium known to cause syphilis, a sexually transmitted infection. Step 2: Neisseria gonorrhoeae causes gonorrhea, not syphilis. Step 3: Chlamydia trachomatis is responsible for causing chlamydia, not syphilis. Step 4: Escherichia coli is commonly found in the gut and can cause gastrointestinal infections, not syphilis. Summary: Treponema pallidum is the correct answer as it is the specific bacterium associated with syphilis, while the other choices are responsible for different infections.

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