treatment Penicillin remains the mainstay of treatment there is no indication that the organism has acquired resistance to penicillin. 。 Doxycycline,tetracycline, erythromycin may be used as an alternative in patients allergic to penicillin.treatment • Penicillin remains the mainstay of treatment there is no indication that the organism has acquired resistance to penicillin. • Doxycycline，tetracycline, erythromycin may be used as an alternative in patients allergic to penicillin