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

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

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.

Bacterial infection marked by flu-like symptoms and a bull’s-eye rash, treatable with antibiotics.