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  • Title: Epidemiologic analysis of nosocomial Salmonella infections in hospitalized horses.
    Author: Ekiri AB, MacKay RJ, Gaskin JM, Freeman DE, House AM, Giguère S, Troedsson MR, Schuman CD, von Chamier MM, Henry KM, Hernandez JA.
    Journal: J Am Vet Med Assoc; 2009 Jan 01; 234(1):108-19. PubMed ID: 19119974.
    Abstract:
    OBJECTIVE: To examine the relationship between abdominal surgery and nosocomial Salmonella infections and the relationship between high caseload in combination with abdominal surgery and nosocomial Salmonella infections in hospitalized horses with signs of gastrointestinal tract disease. ANIMALS: 140 horses. DESIGN: Case-control study. PROCEDURES: To accomplish the first objective, 1 to 4 control horses were matched with each nosocomial case horse on the basis of admission date of a primary case horse. The frequency of abdominal surgery and other investigated exposure factors were compared between nosocomial case horses and control horses. For the second objective, 4 control horses were matched with each nosocomial case horse on the basis of year of admission. The frequency of high caseload (>or=26 inpatients), abdominal surgery, and other factors was compared between nosocomial case horses and control horses. RESULTS: The odds of nosocomial Salmonella infection were 8 times as high (odds ratio=8.2; 95% confidence interval=1.11, 60.24) in horses that underwent abdominal surgery, compared with the odds for horses that did not undergo surgery. High caseload alone or in combination with abdominal surgery was not associated with increased risk of nosocomial Salmonella infection. CONCLUSIONS AND CLINICAL RELEVANCE: Abdominal surgery was identified as a risk factor for nosocomial Salmonella infections in horses. Horses that undergo abdominal surgery require enhanced infection control and preventative care. Risk of nosocomial Salmonella infections may be reduced by implementation of biosecurity measures (such as the use of plastic boots, gloves, and footbaths) immediately after surgery.
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