My daughter got a positive lyme screen. doc wants to start treatment right away before western blot comes back.is this ok?

Yes: Lyme is ultimately a clinical diagnosis; tests can help confirm but have both false positives and false negatives. It can take 6 weeks after infection for the western blot to turn positive and it is important to treat as soon a possible after becoming infected. Esp. If symptoms (or a tick bite) began recently do not wait! see http://www.Lymedisease.Org/lyme101/lyme_disease/lyme_diagnosis.Html.

Yes: It is appropriate to start Doxycycline if you suspect primary lyme disease before any test results return.