I've had 2 patients with Rocky Mountain Spotted Fever caused by a rickettsial organism. Caused severe headaches and very high fever. The grown man about 38 years old had residual hearing loss for 2 or 3 months. Both came in with a large necrotic lesion on their lower extremity. Interesting case. This is transmitted by tick. I read that tularemia can occacionally be transmitted by tick, but mostly by direct contact of handling a dead rabbit.
Dead rabbit was the culprit in brother-in-law's case... he was feeding a young owl he'd found injured after a storm. (It recovered before he did ;) BTW, he's also had Rocky Mountain Spotted Fever.