UTI Laboratory Diagnosis Quiz Form
Test your knowledge of urinary tract infection laboratory diagnosis. All questions are medically relevant and non-sensitive.
Which of the following is the most common pathogen causing uncomplicated urinary tract infections?
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Escherichia coli
Staphylococcus aureus
Klebsiella pneumoniae
Proteus mirabilis
What is the preferred specimen for laboratory diagnosis of UTI?
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Midstream clean-catch urine
First voided morning urine
Catheterized urine
Random urine sample
Which laboratory test is most specific for confirming bacteriuria?
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Urine culture
Urine dipstick leukocyte esterase
Microscopic examination for WBCs
Nitrite test
Which finding on urinalysis is most suggestive of a urinary tract infection?
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Positive nitrite test
Proteinuria
Glucosuria
Hematuria
What is the minimum colony count (CFU/mL) considered diagnostic for significant bacteriuria in a clean-catch urine sample?
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≥100,000 CFU/mL
≥10,000 CFU/mL
≥1,000 CFU/mL
≥500 CFU/mL
Which of the following is NOT a common laboratory contaminant in urine cultures?
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Escherichia coli
Lactobacillus spp.
Corynebacterium spp.
Coagulase-negative staphylococci
Which test detects pyuria in urine samples?
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Microscopic examination for WBCs
Protein test
Glucose test
Ketone test
What is the recommended time frame for processing a urine specimen for culture after collection?
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Within 2 hours
Within 6 hours
Within 12 hours
Within 24 hours
Which of the following findings would most strongly suggest contamination of a urine specimen?
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Multiple bacterial species isolated
High colony count of E. coli
Presence of nitrites
Leukocyte esterase positive
Which organism is most likely to produce a positive urine nitrite test?
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Escherichia coli
Enterococcus faecalis
Staphylococcus saprophyticus
Candida albicans
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