title: N-acetyl-beta-glucosaminidase in the localization of the site of urinary tract infections.
abstract: Excretion of N-acetyl-beta-glucosaminidase was measured in 57 patients with urinary tract infections and in 19 normal subjects. The normal range was 0.17 to 1.16 iu/mmol creatinine. The mean NAG/creatinine ratio was 3.11 in 28 patients with upper, and 1.14 in 21 patients with lower urinary tract infection (p = 0.0006). However, even among those clinically defined as having lower urinary tract infections, 18% had NAG/creatinine ratios above the normal range. The mean NAG/creatinine ratio of 8 patients with lower urinary tract symptoms who had underlying uronephrological diseases/systemic diseases capable of causing nephropathy was intermediate between the value obtained in patients with upper, and that observed in patients with lower urinary tract infections.
authors.affiliation: Department of Medicine, University of Hong Kong, Queen Mary Hospital.
authors.forename: M K
authors.initials: MK
authors.lastname: Chan
mesh_terms: D000118:Acetylglucosaminidase / Q000652:urine*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005260:Female; D006596:Hexosaminidases / Q000652:urine*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014551:Urinary Tract / Q000201:enzymology; D014552:Urinary Tract Infections / Q000201:enzymology* / Q000652:urine
chemical_list: D006596:Hexosaminidases; D000118:Acetylglucosaminidase