Which urine finding supports a urinary tract infection rather than glomerulonephritis?

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Multiple Choice

Which urine finding supports a urinary tract infection rather than glomerulonephritis?

Explanation:
The key idea is using urinalysis patterns to tell infection from glomerular disease. White blood cells in the urine together with a positive leukocyte esterase test indicate pyuria due to infection of the urinary tract. This neutrophil-driven inflammatory signal is classic for a UTI. Glomerulonephritis, on the other hand, more commonly shows red blood cell casts and sometimes proteinuria from glomerular damage, not primarily neutrophilic inflammation. Crystals point to stone disease or crystal-induced issues, not infection. So the finding of WBCs with leukocyte esterase is the best clue that points toward a urinary tract infection rather than glomerulonephritis.

The key idea is using urinalysis patterns to tell infection from glomerular disease. White blood cells in the urine together with a positive leukocyte esterase test indicate pyuria due to infection of the urinary tract. This neutrophil-driven inflammatory signal is classic for a UTI. Glomerulonephritis, on the other hand, more commonly shows red blood cell casts and sometimes proteinuria from glomerular damage, not primarily neutrophilic inflammation. Crystals point to stone disease or crystal-induced issues, not infection. So the finding of WBCs with leukocyte esterase is the best clue that points toward a urinary tract infection rather than glomerulonephritis.

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