title: Falsely negative urinary leucocyte counts due to delayed examination.
abstract: Microscopic examination for urinary leucocytes was performed in the ward immediately after micturition and approximately 3 h later at a laboratory. Of the forty-eight specimens classified as positive by counting in the ward, 35% erroneously turned up negative by later counting at the laboratory. Counting of urinary leucocytes should consequently be performed as soon as possible after micturition, probably within 1 h.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005188:False Negative Reactions; D006801:Humans; D007223:Infant; D007958:Leukocyte Count; D008297:Male; D013048:Specimen Handling; D013997:Time Factors; D014552:Urinary Tract Infections / Q000175:diagnosis; D014556:Urine / Q000166:cytology*