Question

Which one of the following bacterial pathogenic genus is classified under Gram-negative aerobic and microaerophilic rods?

• A. Acidovorax
• B. Erwinia
• C. Pantoea
• D. Enterobacter

Hint:

Bacterial classification:
- Acidovorax: Gram-negative, aerobic, microaerophilic.
- Erwinia: Gram-negative, facultatively anaerobic.
- Pantoea: Gram-negative, facultatively anaerobic.
- Enterobacter: Gram-negative, facultatively anaerobic.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of bacterial classification based on staining and oxygen requirements.

Step 2: Detailed Explanation:
Acidovorax (A) is a genus of Gram-negative bacteria.
It is aerobic and microaerophilic (requires low oxygen).
It is a plant pathogenic bacterium causing diseases in various crops.
Other genera:
- Erwinia (B): Gram-negative, facultatively anaerobic (causes soft rot).
- Pantoea (C): Gram-negative, facultatively anaerobic.
- Enterobacter (D): Gram-negative, facultatively anaerobic (mostly human pathogens).
Thus, Acidovorax is Gram-negative, aerobic, and microaerophilic.

Step 3: Final Answer:
Thus, Acidovorax is classified under Gram-negative aerobic and microaerophilic rods, which corresponds to option (A).
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