Question 7 10 points Save Answer Knowing that a catheterized urine was cultured

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Question 7 10 points Save Answer Knowing that a catheterized urine was cultured using a 10ul calibrated loop and 3 beta hemolytic colonies grew on the CNA and 50 pink colonies grew on the MacConkey, what should be reported at 24 hours? 300 cfu/ml gram positive cocci and 5000 cfu/ml of a lactose fermenting gram- negative rod isolated. Identifications and susceptibility will follow 300 cfu/ml gram positive cocci and 5000 cfu/ml of a lactose fermenting gram- negative rod isolated. Results are not significant 3000 cfu/ml gram positive cocci and 50000 cfu/ml of a lactose fermenting gram- negative rod isolated. Identifications and susceptibility will follow 30 cfu/ml gram positive cocci and 500 cfu/ml of a lactose fermenting gram-negative rod isolated. ldentifications and susceptibility will follow

Explanation / Answer

Colony Forming Unit (CFU)/ml is calculated by following formula

CFU/ml = (Number of colonies * Dilution factor) / volume of culture plated

Here, we dont know how much the original sample is diluted, means Dilution factor cannot be calculated.

Hence, results are non significant.

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