Kiti iyi inoshandiswa pakuona kwemhando yemasoja ekudzivirira chirwere chesyphilis muropa/serum/plasma in vitro yemunhu, uye akakodzera kuongororwa kwevarwere vanofungidzirwa kuti vane utachiona hwesyphilis kana kuongororwa nyaya munzvimbo dzine huwandu hwehutachiona.