Yes, you do need to worry:
www.columbia-lyme.org/patients/tbd_stari.htmlwww.clemson.edu/cafls/departments/esps/factsheets/medvet/tick_borne_diseases_affecting_humans_in_the_southeastern_united_states_mv19.htmllonestartick.com/It's claimed that it doesn't carry Lyme (Borrelia burgdorferi), but it does carry a Borrelia strain and can cause what is termed as STARI (Southern Tick Associated Rash Illness) or Master's Disease - and several other infections.
I would encourage you to either get your kids in to see a LLMD or start them on astragalus as per Buhner. Growing up with these infections is not fun and is incredibly hard on the body.