For this procedure we used a MacConkey agar in order to differentiate between gram-negative enteric bacteria and their ability to grow on the agar and ferment lactose. First we used aspetic technique to inoculate the agar plate with our bacteria. Next, we incubated the sample for 48 hours at 35 degree celsius. We examined the plate the next day and found a negative result. We concluded that because there was not a broad change of color on the agar, the bacteria was a non-lactose fermenter.
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