Clinical trial Recruiting at 2 sites Observational Ages 18 and up

Investigating causes and early detection of infections after major abdominal surgery

Official title: New Studies of the Pathogenesis of Postoperative Infections and Development of Biomarkers for Early Diagnosis of Postoperative Complications

Run by National Cancer Center Affiliate of Vilnius University Hospital Santaros Klinikos · NCT06513598 · Data updated 2026-11-12

This study is trying to find out if germs from the gut and mouth can cause infections after major abdominal surgery in cancer patients, and if certain biological markers can help predict these infections.

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Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment200 (estimated)
SponsorNational Cancer Center Affiliate of Vilnius University Hospital Santaros Klinikos
Academic / other
Drugs / interventionsradiation
Locations2 sites (Vilnius and 1 other locations)
StatusRecruiting
StartedJuly 1, 2024
Main results expectedMay 30, 2025
Study endsMay 1, 2029
Registry record updatedAugust 1, 2024
Trial IDNCT06513598 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults scheduled for major abdominal surgery due to confirmed or suspected gastrointestinal cancer.

Probably not a fit

Patients who have had previous surgical resections of the digestive tract or those with certain gastrointestinal infections or conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to explore the mechanisms behind postoperative infections following major abdominal surgeries, particularly in cancer patients. It will analyze the preoperative microbiome from patients' gut and oral cavities to determine if pathogens from these areas contribute to surgical site infections. Additionally, the study will collect biological samples to identify biomarkers that may predict the likelihood of developing infections post-surgery. By challenging the traditional understanding of infection sources, this research seeks to provide new insights into infection prevention.

Why it matters

Potential benefit: If successful, this study could lead to improved strategies for preventing postoperative infections, enhancing patient outcomes after major surgeries.

How similar studies have gone: While the approach of investigating the microbiome in relation to postoperative infections is gaining interest, this specific study's focus on the Trojan Horse theory is relatively novel and has not been extensively tested in prior research.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. The patient is scheduled to undergo a major resection-type abdominal surgery due to cancer of the esophagus, stomach, pancreas, liver, bile ducts, colon or rectum.
2. Patient is willing to participate.
3. Age ≥ 18 years.

Exclusion Criteria:

1. Pregnancy.
2. Previous surgical resection of the digestive tract, excluding appendectomy and/or cholecystectomy.
3. Anticipated operation with preventive ileostomy.
4. The operation is planned to be performed as a matter of urgency.
5. Antibiotic therapy ≤1 month. before surgery.
6. Chronic inflammatory bowel disease (non-specific ulcerative colitis, Crohn's disease) or radiation or other colitis of origin.
7. During the last year, the patient suffered from Cl. difficile colitis or was Cl. difficile carrier, had salmonellosis or others intestinal infections.
8. During the last year, the patient used (\> 3 months) pre-/pro-/(syn)biotics.
9. During the last year, the patient has been taking proton pump inhibitors continuously (\> 6 months).

Where it's running

  • National Cancer Institute
    Vilnius, Lithuania
    Recruiting
  • Vilnius University hospital Santaros Klinikos
    Vilnius, Lithuania
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.