Question

Which of the following genus is/are a spirochete(s)?

• A. Borrelia
• B. Leptospira
• C. Spirulina
• D. Treponema

Hint:

Don’t confuse spiral-shaped cyanobacteria ({Spirulina}) with true spirochetes. True spirochetes have endoflagella inside the periplasm, giving them corkscrew motility.

Answer 1

The Correct Option is A, B, D

Spirochetes are a group of Gram-negative, helical, motile bacteria characterized by axial filaments (endoflagella).
- Borrelia (causes Lyme disease) is a classic spirochete.
- Leptospira (causes leptospirosis) is also a spirochete.
- Treponema (e.g., T. pallidum, the agent of syphilis) is a spirochete.
- Spirulina, although spiral-shaped, is a cyanobacterium (blue-green algae), not a spirochete.
\fbox{Thus, the correct answer is (A), (B), and (D).}