<prompt> Which of the following statements about Chlamydia trachomatis is true:May be isolated on aificial media by culture of purulent endocervical dischargeMost genital chlamydial infections are symptomaticUse of OCP is associated with increased risk of asymptomatic chlamydial infectionPenicillin is the drug of choice for treatment  <response>: Patients on treatment with oral contraceptives have a increased risk of asymptomatic chlamydial infections. Ref: Clinical Obstetrics and Gynaecology by Brian A. Magowan, Philip Owen, James Drife, Pages 126-128. 