Why is trichomoniasis hard to get rid off? one course of treatment with antibiotics and vaginal suppositories wasn't enough. i am taking another treatment, after 9 months. i havent had sex since the first treatment. will i need another treatment?

Treating trichomonas: Persistent trich after Rx usually is because metronidazole is only moderately active against it. Oral treatment is more effective than vaginal; and oral for a 5-7d more reliable than single dose. Tinidazole (Tindamax) is more active, sometimes works better. Rare cases are highly resisitant to both and may require special treatment e.g. paromomycin IV. See infectious disease specialist. Good luck!