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Surgical Closure of Equine Abdomen, Prevention, and Management of Incisional Complications
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Is Previous Postoperative Infection an Independent Risk Factor for Postoperative Infection after Second Unrelated

Susan L Feldt1, Robert Keskey2, Pranav Krishnan1

  • 1From the Pritzker School of Medicine, University of Chicago, Chicago, IL (Feldt, Krishnan).

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A prior surgical site infection increases the risk of developing another infection after a second operation. These subsequent infections are more likely to be antibiotic-resistant, necessitating personalized antibiotic prophylaxis strategies.

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Area of Science:

  • Surgical site infections
  • Antibiotic resistance
  • Public health

Background:

  • Postoperative infections are a significant challenge in abdominal surgery.
  • Current antibiotic prophylaxis protocols are standardized and do not account for individual patient history.
  • Previous infections may increase risk due to antibiotic resistance in subsequent operations.

Purpose of the Study:

  • To investigate if a previous postoperative infection is a risk factor for developing infection after a second unrelated surgery.
  • To assess the impact of prior infection on the likelihood and characteristics of subsequent infections.

Main Methods:

  • Retrospective study of patients undergoing two unrelated abdominal operations (2012-2018).
  • Analysis of clinical variables and microbiological culture results.
  • Construction of univariate and multivariable regression models.

Main Results:

  • Patients with a prior infection had a 2.49 times higher risk of infection after a second surgery.
  • Infections after the second surgery were more likely to be antibiotic-resistant (82.3% vs 64.1%).
  • Nearly half of second-surgery infections were resistant to the prophylactic antibiotic used.

Conclusions:

  • Previous postoperative infection is an independent risk factor for subsequent infections.
  • Prior infection is associated with increased antibiotic resistance, challenging standard prophylaxis.
  • Individualizing antibiotic prophylaxis for patients with prior infections is recommended.