Utilidad del citoquímico y la coloración de Gram en muestras de orina en el diagnóstico de las infecciones del tracto urinario en pacientes hospitalizados

Translated title of the contribution: Usefulness of urinalysis and urine Gram stain in the diagnosis of urinary tract infection in hospitalized patients

Jaime Alberto López Vargas, Mónica Cecilia Cuartas Trujillo, Olga Lucía Molina Upegui, Ana Cristina Restrepo Ceballos, Claudia Yarely Maya Carmona, Sergio Jaramillo Velásquez, Jorge Hernando Donado Gómez

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

OBJECTIVE: To evaluate the usefulness of urinalysis and of urine Gram stain in the diagnosis of urinary tract infection in hospitalized patients. DESIGN AND SAMPLE: Urinalysis and Gram stain of non centrifuged urine were carried out according to the requests of physicians, in specimens submitted to the laboratory for urine culture. When this modality of Gram stain had not been requested, it was done with urine sediment. Results were compared with those of the culture. RESULTS: Ten thousand nine hundred and seventeen urine cultures were carried out, as well as 6.762 urinalyses, 2.762 Gram stains of non centrifuged urine, and 8.008 Gram stains of urine sediments. In comparison with the urine culture, urinalyses had 99% sensitivity, 51% specificity, 60% positive predictive value, and 98% negative predictive value. Gram stain of non centrifuged urine had 98% sensitivity, 73% specificity, 82% positive predictive value, and 97% negative predictive value. Gram stain of urine sediment had 95% sensitivity, 78% specificity, 67% positive predictive value, and 97% negative predictive value. CONCLUSIONS: Urinalysis, following well defined criteria, and Gram stain have high negative predictive values, that may allow to use them as screening tests to determine the need to request urine culture.

Translated title of the contributionUsefulness of urinalysis and urine Gram stain in the diagnosis of urinary tract infection in hospitalized patients
Original languageSpanish
Pages (from-to)377-384
Number of pages8
JournalIatreia
Volume18
Issue number4
StatePublished - Dec 2005
Externally publishedYes

Bibliographical note

Funding Information:
The work is supported by the National Science Foundation of China (NSFC) under grant No. 60433030 and the research fund from the joint fund of NSFC-RGC (Research Grant Council of Hong Kong) under grant No. 60418012 and N-CUHK417/04. The work is affiliated with the Microsoft-CUHK Joint Laboratory for Human-centric Computing and Interface Technologies.

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