Which disease is a bacterial disease spread by ticks?

• A. Dengue.
• B. Tularemia.
• C. Relapsing fever.
• D. Colorado tick fever.

Answer: (B)

Bacteria that can be transmitted by tick bites include Tularemia. It’s caused by Francisella tularensis, a bacterium, and one of its well-known transmission routes is through tick bites after the tick has fed on an infected animal. This makes Tularemia a classic tick-borne bacterial disease. By contrast, dengue is caused by a virus spread by Aedes mosquitoes, and Colorado tick fever is also viral, transmitted by ticks. Relapsing fever is indeed bacterial and can be transmitted by ticks in some forms, but Tularemia is the most commonly cited example of a tick-borne bacterial disease in this set, making it the best answer.