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3 results

  • Microbial burden on environmental surfaces in long-term care facilities: a quantitative analysis

  • William A. Rutala, Lauren M. DiBiase, Amy W. Powell, Maria F. Gergen, Emily E. Sickbert-Bennett, Hajime Kanamori, David J. Weber
  • Journal:
    Infection Control & Hospital Epidemiology / Volume 45 / Issue 12 / December 2024
    Published online by Cambridge University Press:
    31 October 2024, pp. 1442-1447
    Print publication:
    December 2024
  • Background:

    We conducted a quantitative analysis of the microbial burden and prevalence of epidemiologically important pathogens (EIP) found on long-term care facilities (LTCF) environmental surfaces.

    Methods:

    Microbiological samples were collected using Rodac plates (25cm2/plate) from resident rooms and common areas in five LTCFs. EIP were defined as MRSA, VRE, C. difficile and multidrug-resistant (MDR) Gram-negative rods (GNRs).

    Results:

    Rooms of residents with reported colonization had much greater EIP counts per Rodac (8.32 CFU, 95% CI 8.05, 8.60) than rooms of non-colonized residents (0.78 CFU, 95% CI 0.70, 0.86). Sixty-five percent of the resident rooms and 50% of the common areas were positive for at least one EIP. If a resident was labeled by the facility as colonized with an EIP, we only found that EIP in 30% of the rooms. MRSA was the most common EIP recovered, followed by C. difficile and MDR-GNR.

    Discussion:

    We found frequent environmental contamination with EIP in LTCFs. Colonization status of a resident was a strong predictor of higher levels of EIP being recovered from his/her room.