Tf ibaho cyane muri plasma, impuzandengo y'ibirimo ni 1.20 ~ 3.25g / L. Mu bantu bafite ubuzima bwiza umwanda, ntahari hafi. Iyo inzira yigifu ivuye amaraso, Tf muri serumu itembera mumitsi yigifu kandi igasohoka hamwe numwanda, iba myinshi mumyanda yabarwayi bava gastrointestinal. Kubwibyo, fecal Tf igira uruhare rukenewe kandi rukomeye mugutahura amaraso gastrointestinal. Igikoresho nikizamini cyoroshye, kigaragara cyujuje ubuziranenge cyerekana Tf mumyanda yabantu, gifite sensibilité yo hejuru kandi yihariye. Ikizamini gishingiye ku buryo bwihariye bwihariye antibodies sandwich reaction ihame hamwe na zahabu immunochromatographic assay tekinike yo gusesengura, irashobora gutanga ibisubizo muminota 15.