<Li> Using the swab, streak the Mueller - Hinton agar plate to form a bacterial lawn . <Ul> <Li> To obtain uniform growth, streak the plate with the swab in one direction, rotate the plate 90 ° and streak the plate again in that direction . </Li> <Li> Repeat this rotation 3 times . </Li> </Ul> </Li> <Ul> <Li> To obtain uniform growth, streak the plate with the swab in one direction, rotate the plate 90 ° and streak the plate again in that direction . </Li> <Li> Repeat this rotation 3 times . </Li> </Ul> <Li> To obtain uniform growth, streak the plate with the swab in one direction, rotate the plate 90 ° and streak the plate again in that direction . </Li> <Li> Repeat this rotation 3 times . </Li>

Which of the following is not a factor that may influence the guthrie test