Do you provide empiric doxycycline for Lymes Disease to asymptomatic patients after a tick bite who haven't developed Erythema migrans or are not sure it was an Ixodes tick?   

I would base post-exposure prophylaxis upon local prevalence (unless the patient has a recent notable travel history). For example, Lyme disease is very rare in California due to the the Ixode tick's intermediate host being the Western Fence Lizard (long story short, something in their blood kills t...