Sterilized Cotton Swabs

1. The five petri dishes are stored in a refrigerator. The petri dishes are brought to room temperature before the start of the experiment, by taking them out of the refrigerator and allowing them to attain room temperature. The petri dishes are labeled A, B, C, D, and E. Before starting the … we make sure to wear sterile gloves to avoid transferring other bacteria on hands onto cotton swab/petri dish.
2. The sterilized cotton swabs are first made damp using sterilized water. The swabs are rubbed in the following 5 places and then rolled and rubbed in the petri dishes:
A: Rub the swab on the pass-code for the main entrance of the school and then roll it over the agar in petri dish A.
B: Rub the swab on the door handle in room 3.1 and then