You worked in Los Angeles following the devastation of the E…
You worked in Los Angeles following the devastation of the Eaton and Palisades Fires. There was an outbreak of diarrhea among the people living in the shelters. You took food and drinking water samples from several sources to see if there was fecal contamination. Which side on the pictured MacConkey agar plate (see below) represents the growth of a fecal coliform? a. side A (left)b. side B (right) What is the selective component of MacConkey medium? a. bile salts and crystal violetb. pH 5.6c. 7.5% sodium chlorided. eosin and methylene blue What is the differential component of MacConkey agar? a. methyl red b. neutral red c. phenol red d. bromothymol blue Would a health-care provider be more concerned to find a lactose-fermenter or a lactose-non-fermenter in a patient’s stool culture, and why? a. More concerned to find a lactose-fermenter; it could be a pathogen such as Salmonella. b. More concerned to find a lactose-non-fermenter; it could be a pathogen such as Salmonella. c. Both answers are correct. d. Neither answer is correct.