Pyelonephritis laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

PMID: 21292654

Laboratory Findings

• Urinalysis: Urinalysis is testing of a urine sample. The urine sample is collected in a special container in a health care provider’s office or commercial facility and can be tested in the same location or sent to a lab for analysis. The presence of white blood cells, nitrites and bacteria in the urine indicate infection and also indicate the need to start empirical treatment.
• Urine culture: A urine culture is performed by placing part of a urine sample in a tube or dish with a substance that encourages any bacteria present to grow. The urine sample is collected in a special container in a health care provider’s office or commercial facility and sent to a lab for culture. Once the bacteria have multiplied, which usually takes 1 to 3 days, they can be identified. The health care provider can then determine the best treatment.