trichomoniasis is considered an incidental finding since the pap smear is really for detecting cervical cancer. you would need to ask the doctor about his/her rationale for those other tests but since trichomoniasis is often sexually-transmitted the doctor may be looking for other stds. things that would not show up on a pap (like chlamydia).
after a positive pap for trichomoniasis why would a doctor give other tests? is the pap not accurate?