Which type of ticks are considered medically important?

• A. Ixodidae
• B. Argasidae
• C. Both
• D. None

Answer: (A)

Hard ticks, the Ixodidae, are the medically important group. They are the primary vectors for a wide range of pathogens that affect humans and animals, and their feeding behavior plays a big role in transmission. They attach to a host for extended periods—often 24 to 72 hours—allowing pathogens like Borrelia burgdorferi (Lyme disease), Rickettsia rickettsii ( Rocky Mountain spotted fever), and others to move from tick to host. Soft ticks (Argasidae) do bite and can transmit some pathogens, but they are less commonly implicated in human disease compared with hard ticks, though there are exceptions such as certain relapsing fever Borrelia transmitted by Ornithodoros species. So the ticks most associated with medically significant disease are the hard ticks.