False-positive Chlamydiazyme results during urine sediment analysis due to bacterial urinary tract infections.

摘要: Our study examined whether urinary tract infections (UTIs) would cause false-positive results when urine sediment was tested with the Chlamydiazyme (CZ) system. Thirty-six infected samples and fifteen controls were studied. All negative. Forty-seven percent of Escherichia coli UTIs (n = 30) 100% Klebsiella pneumoniae 4) positive on CZ testing sediment. Nine E. by negative direct fluorescent-antibody staining. When suspensions pure cultures analyzed, 47% K. positive. False-positive not related to organism biotype or characteristics, including pH, specific gravity, leukocyte count. We conclude that presence a UTI also bacterial contamination must be ruled out prior testing.