For my medical microbiology course at Kutztown University of Pennsylvania we were asked to take a sample from our nose. Using a sterile cotton swab, a sample was taken from a nostril and then spread onto the Mannitol Salt Agar plate supplied. The plate was incubated at 37 degrees Celsius, then examined for colony growth and color change. If the media turned from red to yellow, the colonies present were S. aureus. As one can see, the media has a yellow tint and a colony sample was gram stained and examined under a microscope and found to be staphylococcus aureus.