I-Tf ikhona ikakhulu kwi-plasma, umxholo oqhelekileyo malunga ne-1.20 ~ 3.25g / L. Kwilindle labantu abasempilweni, phantse akukho bukho. Xa umjelo wokwetyisa wopha, i-Tf kwiserum iqukuqela ukuya kumzila wesisu kwaye ikhutshelwe ilindle, ininzi kwilindle lezigulane ezophayo zesisu. Ngoko ke, i-fecal Tf idlala indima eyimfuneko kunye nebalulekileyo ekubhaqweni ukopha kwesisu. Ikhithi luvavanyo olulula, olubonakalayo olubonayo olubona i-Tf kwilindle lomntu, inobuntununtunu obuphezulu kunye nobungqongqo obuqinileyo. Uvavanyo olusekwe kumgaqo-nkqubo wokuphendula wesangweji ye-antibodies ephindwe kabini kunye negolide ye-immunochromatographic assay, inokunika iziphumo kwimizuzu eli-15.