Question

Which one of the following pair is incorrect?

• A. Q fever- Coxiella burnetti
• B. Brucellosis- Brusella sp.
• C. Peptic ulcer- Bacillus subtilis
• D. Bubonic plague- Yersinia pestis

Hint:

The discovery that peptic ulcers are caused by Helicobacter pylori (and can be cured with antibiotics) won Robin Warren and Barry Marshall the Nobel Prize in Physiology or Medicine in 2005.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Various infectious diseases in humans and livestock are caused by specific pathogenic microorganisms.
Recognizing the correct host-pathogen relationships is fundamental to food microbiology and public health.

Step 2: Detailed Explanation:
Let us analyze each pair:
- Q fever -- {Coxiella burnetii (spelled burnetti in the paper's typo): Correct. C. burnetii is the highly heat-resistant intracellular bacterium that causes Q fever, commonly transmitted via unpasteurized milk.
- Brucellosis -- Brucella sp. (spelled Brusella in the paper's typo): Correct. Brucella species cause zoonotic brucellosis in cattle and humans.
- Peptic ulcer -- {Bacillus subtilis: Incorrect. Peptic ulcers are caused primarily by infections of the helically-shaped bacterium Helicobacter pylori, which survives the acidic stomach environment by secreting urease. Bacillus subtilis is a non-pathogenic, spore-forming soil bacterium.
- Bubonic plague -- {Yersinia pestis: Correct. Y. pestis is the classic rod-shaped bacterium transmitted by fleas that causes plague.

Step 3: Final Answer:
The incorrect pair is option (C).