Rare but serious bacterial disease often spread by ticks or rabbits, causing ulcers, swollen nodes, or pneumonia depending on the infection route.

Red meat allergy that causes delayed allergic reactions hours after eating.

Viral illness from Rocky Mountain wood ticks, causing fever, fatigue, and sometimes a two-phase illness.

Rare viruses causing flu-like symptoms and low blood cell counts, spread by ticks.

Lyme-like illness linked to the lone star tick, causing a bull’s-eye rash and flu-like symptoms, but milder and less understood.

Rare but dangerous tick-borne virus that can cause brain inflammation and long-term damage.

Life-threatening bacterial illness marked by fever and rash, needing urgent doxycycline treatment.

Bacterial illness causing flu-like symptoms, best treated early with doxycycline.

Bacterial infection that targets monocytes and is treated with doxycycline.

Babesiosis is a malaria-like tick-borne disease that destroys red blood cells.