logmosse - just wanted to address a statement you made:
"Also there is a lot of evidence that says even just one dose of doxycycline is enough to kill Lyme if taken within 72 hours of a bite."
According to ILADS a single dose of doxycycline is not recommended: Evidence assessments and guideline recommendations in Lyme disease: the clinical management of known tick bites, erythema migrans rashes and persistent disease:
"Does a single 200 mg dose of doxycycline following a tick bite provide effective prophylaxis for Lyme disease?
Recommendation 1a
Clinicians should not use a single 200 mg dose of doxycycline for Lyme disease prophylaxis (Recommendation, very low-quality evidence).
Recommendation 1b
Clinicians should promptly offer antibiotic prophylaxis for known Ixodes tick bites in which there is evidence of tick feeding, regardless of the degree of tick engorgement or the infection rate in the local tick population. The preferred regimen is 100–200 mg of doxycycline, twice daily for 20 days. Other treatment options may be appropriate on an individualized basis (Recommendation, very low-quality evidence).
www.tandfonline.com/doi/full/10.1586/14787210.2014.940900