[Presumptive tests in screening for detecting urinary tract infections in patients with diabetes type-2].
OBJECTIVE
To determine the validity of the presumptive tests used to analyze urine in order to detect urinary tract infections in patients with diabetes mellitus type-2.


METHODS
In 2001, a cross-sectional study was carried out in 160 patients with diabetes mellitus type-2 who were clinically diagnosed with urinary tract infections. Patients were from Tlapa, which is located in the state of Guerrero. Urine samples were microscopically analyzed to determine the number of leukocytes and bacteria in centrifuged samples and urine without centrifuge. The leukocyte esterasa andnitrites were measured using reactive strips. All samples were subjected to urine culture to confirm urinary tract infections. Sensitivity, specificity, and predictive values were calculated for leukocyte count, bacteriuria, leukocyte esterasa and nitrites using positive urine cultures as the standard of measurement.


RESULTS
Urinary tract infections were confirmed in 31% of patients. The presence of bacteria in centrifuged urine, leukocyte esterasa and the leukocyte count were all high with respect to sensitivity and specificity.


CONCLUSIONS
Leukocyte esterasa and microscopic bacteriuria measurements in centrifuged urine offer reliability in the early diagnosis of urinary tract infections.
Flores-Alfaro
Eugenia
E
Facultad de Ciencias Quìmico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, México. efloresa@todito.com
Parra-Rojas
Isela
I
Jiménez-Acevedo
Angelino
A
Fernández-Tilapa
Gloria
G
D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000150:complications* / Q000652:urine*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D014552:Urinary Tract Infections / Q000150:complications* / Q000652:urine*