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Asymptomatic bacteriuria among the institutionalized elderly.

Yi-Ting Lin1, Liang-Kung Chen, Ming-Hsien Lin

  • 1Department of Family Medicine, Taipei Veterans General Hospital, Taiwan, ROC.

Journal of the Chinese Medical Association : JCMA
|July 14, 2006
PubMed
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Asymptomatic bacteriuria is common in Taiwanese long-term care facility residents, affecting over half of those studied. This condition was not linked to factors like age, sex, or nutritional status in this elderly population.

Area of Science:

  • Gerontology
  • Infectious Diseases
  • Microbiology

Background:

  • Urinary tract infections (UTIs) are a significant health concern in long-term care facilities (LTCFs).
  • Asymptomatic bacteriuria (ASB) presents diagnostic and management challenges for healthcare professionals in these settings.
  • Understanding the prevalence and associated factors of ASB in institutionalized elderly populations is crucial for effective healthcare strategies.

Purpose of the Study:

  • To determine the prevalence of asymptomatic bacteriuria among elderly residents in Taiwanese LTCFs.
  • To investigate potential factors associated with asymptomatic bacteriuria in this demographic.

Main Methods:

  • A study was conducted in 2002 involving 64 residents from private LTCFs in Taiwan.
  • Urine bacterial cultures were performed twice, one week apart, excluding individuals with UTI symptoms.

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  • Bacteriuria was defined as ≥10(5) CFU/mL of the same organism in two consecutive samples; ASB required absence of UTI symptoms.

    • Main Results:

    • The prevalence of asymptomatic bacteriuria was high at 57.8% (37/64) among the studied elderly residents.
    • Escherichia coli was the most frequently isolated organism (29.7%), followed by Klebsiella pneumoniae (21.6%).
    • No significant associations were found between ASB and age, sex, functional status, urinary catheter use, previous UTI history, or nutritional status.

    Conclusions:

    • Asymptomatic bacteriuria is highly prevalent in institutionalized elderly Chinese individuals in Taiwan.
    • Escherichia coli is the predominant pathogen causing ASB in this population.
    • Key resident characteristics such as age, sex, functional status, catheterization, prior UTIs, and nutritional status do not appear to be associated with ASB.