I-Virus Transport Medium (VTM) Tube yenzelwe ukuqokelela kunye nokuhambisa iisampulu zeklinikhi eziqukethe iintsholongwane ukulungiselela enye injongo, njengokuzahlula kwintsholongwane, ukukhutshwa kwe-acid ye-nucleic kunye nenkcubeko yentsholongwane.