Tf galibi yana cikin plasma, matsakaicin abun ciki shine kusan 1.20 ~ 3.25g/L. A cikin masu lafiya najasa, kusan babu samuwa. Lokacin zubar jini na hanji, Tf a cikin jini yana gudana zuwa cikin sashin gastrointestinal kuma yana fitar da najasa, yana da yawa a cikin najasar marasa lafiya na jini. Saboda haka, fecal Tf yana taka muhimmiyar rawa kuma mai mahimmanci don gano zubar jini na ciki. Kit ɗin gwaji ne mai sauƙi, na gani na gani wanda ke gano Tf a cikin najasar ɗan adam, yana da ƙwarewar ganowa da ƙayyadaddun ƙaƙƙarfan ƙayyadaddun bayanai. Gwajin da aka danganta da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙwayoyin rigakafin ƙwayoyin cuta guda biyu na sanwichi amsawa da fasahar bincike na gwajin immunochromatographic na gwal, yana iya ba da sakamako cikin mintuna 15.