Following a round of water testing in rural Minnesota, contaminated water was discovered in a stream. The source of the contamination is most likely fecal contamination caused by run-off from a 600-acre dairy farm close to the stream. Heavy rains in the area caused localized flooding and the stream measured water levels well above normal.
After isolating a species of bacteria from the water, the following laboratory tests were completed. The lab notes are listed under laboratory observations. You should record in the results column a positive or negative for each test. To complete the Gram stain results, simply interpret whether it is Gram positive or Gram negative and list the gram reaction and shape. For example: Gram + rods in singles, Gram negative cocci in chains.