Tf imapezeka kwambiri m'madzi a m'magazi, pafupifupi 1.20 ~ 3.25g/L. Mu anthu wathanzi ndowe, pali pafupifupi palibe. Pamene m`mimba thirakiti magazi, ndi Tf mu seramu otaya mu m`mimba thirakiti ndi excreted ndi ndowe, ndi wochuluka mu ndowe za m`mimba magazi odwala. Chifukwa chake, fecal Tf imagwira ntchito yofunikira komanso yofunikira pakuzindikira kutuluka kwa magazi m'mimba. Chidachi ndi mayeso osavuta, owoneka bwino omwe amazindikira Tf mu ndowe za anthu, amakhala ndi chidwi chodziwikiratu komanso tsatanetsatane wamphamvu. Mayeso otengera ma antibodies awiri a sandwich reaction mfundo ndi golide immunochromatographic assay technics, amatha kupereka zotsatira mkati mwa mphindi 15.