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Related Experiment Videos

Urinary tract infection caused by Staphylococcus saprophyticus

P A Jordan, A Iravani, G A Richard

    The Journal of Infectious Diseases
    |October 1, 1980
    PubMed
    Summary

    Staphylococcus saprophyticus is a significant cause of urinary tract infections (UTIs) in young, sexually active women in the US. This common pathogen can cause cystitis and pyelonephritis, and is rarely a contaminant.

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    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Urology

    Background:

    • Urinary tract infections (UTIs) are common, particularly in young women.
    • The causative agents of UTIs can vary geographically.
    • Staphylococcus saprophyticus is recognized as a UTI pathogen in Europe but less so in the US.

    Purpose of the Study:

    • To determine the significance of Staphylococcus saprophyticus as a cause of UTI in the United States.
    • To compare the prevalence of S. saprophyticus UTIs with previous European findings.
    • To establish simple laboratory methods for identifying S. saprophyticus.

    Main Methods:

    • Retrospective analysis of urine cultures from young, sexually active female outpatients.
    • Clinical data review for diagnosis of acute cystitis, pyelonephritis, and UTIs in pregnant patients.
    • Assessment of S. saprophyticus presence in the anal-urogenital flora.
    • Evaluation of novobiocin resistance, hemolysis, coagulase absence, and pigment production for identification.

    Main Results:

    • S. saprophyticus was the second most common cause of UTI in the study population.
    • UTIs caused by S. saprophyticus presented as acute cystitis, pyelonephritis, and in pregnant women.
    • The organism was infrequently found as a contaminant.
    • Presence in anal-urogenital flora correlated significantly with UTI.
    • Identification can be based on novobiocin resistance, lack of hemolysis/coagulase, and pigment.

    Conclusions:

    • Staphylococcus saprophyticus is an important urinary tract pathogen in young female patients in the US.
    • S. saprophyticus should be considered in the differential diagnosis of UTIs in this demographic.
    • Laboratory identification can be achieved through simple phenotypic tests.

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