Which of the following statements about Treponema pallidum division is true?

Which of the following statements about Treponema pallidum division is true?

• A. It divides slowly by binary fission, taking about 30 hours.
• B. It divides rapidly in minutes.
• C. It does not divide.
• D. It divides in days irregularly.

Answer: (A)

Treponema pallidum reproduces by binary fission, but it does so very slowly. Its generation time is about 30 hours, which is much longer than many common lab bacteria that divide in minutes. This slow replication helps explain why the organism is notoriously difficult to culture in the lab and why syphilis tends to progress gradually in patients. The statement that it divides rapidly in minutes or does not divide at all is not accurate, and dividing in days with irregular timing doesn’t match the established generation-time figure.

Treponema pallidum reproduces by binary fission, but it does so very slowly. Its generation time is about 30 hours, which is much longer than many common lab bacteria that divide in minutes. This slow replication helps explain why the organism is notoriously difficult to culture in the lab and why syphilis tends to progress gradually in patients. The statement that it divides rapidly in minutes or does not divide at all is not accurate, and dividing in days with irregular timing doesn’t match the established generation-time figure.