Joe became thirsty while walking in the mountains. He decided to drink water from a stream because ""it’s clear and doesn’t smell funny."" Maria said that he should not drink the water. What would you do if you were Joe? Why?

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.