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Anales de la Facultad de Ciencias Médicas (Asunción)

versión impresa ISSN 1816-8949


VELAZQUEZ, G et al. Results of urine culture in adults carried out by the microbiology laboratory of the Clinics Hospital - San Lorenzo from january 2015 to august 2016 and methods of study of urinary infections available in the institution. An. Fac. Cienc. Méd. (Asunción) [online]. 2017, vol.50, n.2, pp.51-66. ISSN 1816-8949.


The objectives of this work are: to present the methods of study of urinary infections currently available in the Laboratory of Microbiology of the Hospital de Clínicas and to show the data of the urine cultures evaluated retrospectively.

Material and method:

in order to study the available methods in urine cultures in the Laboratory, we have used the laboratory file whose data were consecutively loaded in an Excel data processing form of Microsoft Office ®. The results of the urine cultures were evaluated from January 2015 to August 2016, in a retrospective, observational, cross-sectional study of adults of both sexes. Samples for urine culture are received and processed in the laboratory, following pre-established steps.


The predominant microorganisms were Escherichia coli in 60% of women and 32%of men, Klebsiella pneumonia 19% of men and 14% of women. Other isolated organisms were Candida sp., Enterococcus faecalis, Enterobacter cloacae, Pseudomonas aeruginosa, Proteus mirabilis, Staphylococcus aureus, and Acinetobacter baumanii. Escherichia coli resistance to nitrofurantoin was seen in 6% of men and 1% of women and meropenem resistance to E. coli was also low. As for Klebsiella pneumoniae in women, resistance to meropenem was seen in 3% of cases. In men, the antibiotics tested for Klebsiella pneumoniae showed resistance greater than 30% except for meropenem. Uropathogens producing Extended-Spectrum (-lactamase (ESBL ) and Carbapenemase were found.


Urine collection for urine culture is done following clear guidelines emanating from the laboratory. With the use of media currently available in the laboratory, it is possible to typify the genus and species of both Gram negative and positive bacteria as well as fungi.


The structure of the Laboratory of Microbiology has had advances that allow the precise identification of the germs of the urine cultures, as well as the prevalence and resistance to certain antibiotics. These contributions are particularly useful for the cases of Escherichia coli and Klebsiella pneumoniae due to their high prevalence. It was also possible to verify the emergence of spread spectrum beta-lactamases (ESBL) and carbapenemases.

Palabras clave : antimicrobial susceptibility; urinary tract infections; urine culture; dipstick test; bacterial isolation; antibiogram.

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