Question 5 10 points Save Answer Knowing that a mid-stream urine was streaked wi

Question

Question 5 10 points Save Answer Knowing that a mid-stream urine was streaked with a 1ul calibrated loop, incubated overnight at 35C in ambient air incubator; and the MacConkey agar showed 35 pink colonies at 18-24 hours, what should be reported? O10,000 cfu/ml of a gram positive organism isolated at 1 day 35,000 cfu/ml of a lactose fermenting gram negative rod isolated at 24h. Identification and susceptibilities will follow 3500 cfu/ml of a lactose fermenting gram negative rod isolated at 24h. Identification and susceptibilities will follow. 3500 cfu/ml of a non- lactose fermenting gram negative rod isolated at 24h. Not a significant result.

Explanation / Answer

Answer:- The correct option is B. As the colonies are pink in macConkey agar (selective for gram negative bacteria), it means that they are lactose fermenting bacteria and as 35 colonies is in 1ul inoculum. It means 35000 cfu/ml.

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