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Session:: ePosters-Sun130-M8: Benign Abdominal

EP522 - Microbial Profile of Infra-Mesocolic Abscess: A Retrospective Analysis

Sunday, May 10, 2026
1:46 PM - 1:51 PM ET

    ePoster Presenter(s)

  • Hasan F. Shehab, Jr. (he/him/his)

    Assistant Registrar
    Mubarak Al-Kabeer Hospital
    Kuwait, Hawalli, Kuwait

    Disclosure information not submitted.

    View ePoster

    • Author(s)

  • AA

    Ahmad Albuloushi, n/a

    Intern (Trainee) Doctor
    Mubarak Al-Kabeer Hospital
    Kuwait, Al Asimah, Kuwait

    Disclosure information not submitted.

  • AB

    Ayeh Baqeri, n/a

    Surgical assistant registrar
    Ministry of health kuwait, mubarak alkabeer hospital
    Kuwait city, Hawalli, Kuwait

    Disclosure information not submitted.

  • NA

    Noor Alfadhli, n/a

    PGY 2, in Kuwait Board of General Surgery
    KBGS
    Kuwait city, Al Ahmadi, Kuwait

    Disclosure information not submitted.

  • JA

    Jasim Alabbad, MD FRCSC FACS FASCRS

    Associate Professor
    Kuwait University
    Jabriya, Hawalli, Kuwait

    Disclosure information not submitted.

    • Senior Author(s)

  • FA

    Fawaz Alnaqi, MD MPH FRCSC FACS

    Assistant Professor
    College of Medicine, Kuwait University
    Kuwait city, Al Asimah, Kuwait

    Disclosure information not submitted.

Purpose/Background: Data on the microbial spectrum of infra-mesocolic abscesses remain limited. The aim of the study is to characterizes the overall bacteriology of infra-mesocolic abscess.

Methods/Interventions: Following institutional review board approval, a retrospective study was conducted of all consecutive patients aged ≥ 16 years treated for an infra-mesocolic abscess secondary to appendiceal, diverticular, or Crohn's disease-related pathology from 2010 to 2024 at a single academic center. Demographic, clinical characteristics and culture data were extracted and analyzed.

Results/Outcomes: Of 164 patients identified, 74 had abscess cultures available and were included. The median age was 39.7 (±17.3) years, and 48.6% were male. Clinical diagnoses comprised appendicular abscess in 35 patients (47.3%), diverticular abscess in 25 patients (33.8%), and Crohn's disease-related abscess in 14 patients (18.9%). Abscess management by percutanous drainage was performed in 26 patients (74.3%) with appendicular abscess, 16 patients (64.0%) with diverticular abscess, and 12 patients (85.7%) with Crohn's disease-related abscess. The remaining cultures were obtained surgically. There were 39 (52.7%) cultures that were polymicrobial. Enterobacteriaceae dominated, with the presence of Escherichia coli isolated in 45 cases (60.8%), Klebsiella pneumoniae in 4 (5.4%), Enterobacter spp. in 4 (5.4%), and Proteus spp. isolated in 3 cases (4.1%). Extended-spectrum β-lactamase producers were detected in 16.2% of patients. Among Gram-positive cocci, Streptococcus spp. accounted for 14 isolates (18.9%), and Enterococcus spp. for 11 (14.9%). Obligate anaerobes were present in only 12 cultures (16.2%), primarily Bacteroides spp. (Table 1).

Conclusion/Discussion: Infra-mesocolic abscesses are often polymicrobial, with the most isolated organisms primarily being Enterobacteriaceae and supplemented by anaerobes and enterococci. Targeted therapy according to these microbial patterns may support effective antibiotic stewardship and improve patient outcomes.

Table 1. characteristics and microbiological profile of patients with abdominal abscesses