Which sexually transmitted disease is caused by a motile spirochete bacterium Treponema pallidum?

Which sexually transmitted disease is caused by a motile spirochete bacterium Treponema pallidum?

• A. Syphilis
• B. Hepatitis
• C. Gonorrhea
• D. Herpes simplex

Answer: (A)

Treponema pallidum is a motile spirochete bacterium that causes syphilis. Spirochetes are thin, spiral-shaped bacteria with axial filaments that give them distinctive corkscrew motility, helping them invade tissues and disseminate during infection. Syphilis is sexually transmitted and can present in stages if not treated. The other options are caused by different pathogens: hepatitis is a viral infection; gonorrhea is caused by Neisseria gonorrhoeae, a gram-negative diplococcus; and herpes simplex is caused by a virus.

Treponema pallidum is a motile spirochete bacterium that causes syphilis. Spirochetes are thin, spiral-shaped bacteria with axial filaments that give them distinctive corkscrew motility, helping them invade tissues and disseminate during infection. Syphilis is sexually transmitted and can present in stages if not treated. The other options are caused by different pathogens: hepatitis is a viral infection; gonorrhea is caused by Neisseria gonorrhoeae, a gram-negative diplococcus; and herpes simplex is caused by a virus.