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Related Experiment Videos

Association between Streptococcus milleri and abscess formation after appendicitis.

R H Hardwick1, A Taylor, M H Thompson

  • 1Department of Surgery, Southmead Hospital, Westbury on Trym, Bristol, UK. hardwickrh@cf.ac.uk

Annals of the Royal College of Surgeons of England
|March 4, 2000
PubMed
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Streptococcus milleri bacteria significantly increase the risk of intra-abdominal abscesses and prolonged hospital stays following appendicectomy. Prophylactic antibiotics did not prevent this complication, highlighting a critical area for further research in appendicitis treatment.

Area of Science:

  • Medical Microbiology
  • Surgical Outcomes
  • Infectious Diseases

Background:

  • Appendicitis is a common surgical emergency, but post-operative complications like abscesses can occur despite treatment.
  • The Streptococcus milleri group (SMG) is frequently implicated in gastrointestinal abscesses.
  • Understanding the specific role of SMG in appendicitis outcomes is crucial for improving patient care.

Purpose of the Study:

  • To investigate the association between Streptococcus milleri group (SMG) presence in peritoneal swabs and the development of intra-abdominal abscesses after appendicectomy.
  • To evaluate the impact of SMG on hospital stay duration and other appendicitis severity markers.
  • To determine the efficacy of prophylactic antibiotics in preventing SMG-related complications.

Main Methods:

Related Experiment Videos

  • Retrospective analysis of 301 patients who underwent appendicectomy for appendicitis.
  • Categorization of patients into three groups based on peritoneal bacteriology: SMG (+/- mixed flora), mixed flora only, and sterile.
  • Statistical analysis using chi-squared and Student t-tests to compare outcomes between groups.

Main Results:

  • Patients with SMG had a significantly higher rate of intra-abdominal abscesses (21%) compared to those with mixed flora (3%) or sterile swabs (1.7%) (P < 0.0001).
  • SMG presence was associated with a 7-fold increase in abscess risk and a longer mean hospital stay (10 days vs. 6 and 4 days).
  • No significant difference in gangrenous or perforated appendicitis was observed between SMG and mixed flora groups, but these were less common in the sterile group.

Conclusions:

  • Streptococcus milleri group is a significant independent risk factor for intra-abdominal abscess formation and prolonged hospitalization after appendicectomy.
  • Standard antibiotic prophylaxis appears insufficient to prevent SMG-associated post-appendicectomy abscesses.
  • Further strategies targeting SMG may be necessary to reduce post-appendicectomy complications.