Question:
Which of the following bacteria produce endospores?
A. Actinomyces spp.
B. Bacillus anthracis
C. Nocardia spp.
D. Clostridium spp.
E. Dermatophillus spp.
Choose the correct answer from the option below:
Which of the following bacteria produce endospores?
A. Actinomyces spp.
B. Bacillus anthracis
C. Nocardia spp.
D. Clostridium spp.
E. Dermatophillus spp.
Choose the correct answer from the option below:
A. Actinomyces spp.
B. Bacillus anthracis
C. Nocardia spp.
D. Clostridium spp.
E. Dermatophillus spp.
Choose the correct answer from the option below:
Show Hint
Endospore-Forming Bacterial Genera: Aerobic = Bacillus (e.g., B. anthracis). Anaerobic = Clostridium (e.g., C. tetani, C. botulinum, C. chauvoei).
Updated On: Sep 7, 2026
- A and C only
- C and E only
- A and E only
- B and D only
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Bacterial sporogenesis produces cryptobiotic endospores in medically important Gram-positive rod-shaped genera.
Step 2: Detailed Explanation:
Endospore-forming bacterial genera:
1. Genus {Bacillus (e.g., {Bacillus anthracis - aerobic endospore-forming Gram-positive rods, forming central/subterminal ellipsoidal spores resistant to boiling and desiccation).
2. Genus {Clostridium (e.g., {Clostridium spp. - anaerobic endospore-forming Gram-positive rods, forming subterminal/terminal swollen spores like C. tetani 'drumstick' spores).
3. Actinomyces, Nocardia, and Dermatophilus are non-spore-forming filamentous actinomycetes.
Therefore, B and D are the endospore-producing bacteria.
Step 3: Final Answer:
Thus, the spore-producing bacteria are B and D only, matching option (D).
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