Identifying patients at high risk for chronic pouchitis

Prior anti-TNF exposure and antibiotic exposure in the year before the final stage of ileal pouch-anal anastomosis (IPAA) were associated with an increased risk of developing chronic pouchitis. These findings indicate that it is possible to identify patients at increased risk for chronic pouchitis and that secondary prevention may play a part in decreasing the burden of this condition.

“Although almost 50% of the patients with IPAA for ulcerative colitis [UC] develop pouchitis, it remains a challenge to identify patients at risk at the time of colectomy or IPAA,” outlined Dr Edward Barnes (University of North Carolina at Chapel Hill, NC, USA) [1]. The research team looked at antibiotic prescription patterns after the initial episode of pouchitis and associated clinical factors to identify patients at high risk for chronic pouchitis. “In this way, we may be able to intervene early, reducing the burden of disease,” stated Dr Barnes.

This nationwide cohort study used data from Danish national registries and evaluated patients undergoing IPAA for UC. In total, 662 patients had a diagnosis of pouchitis and an initial prescription for antibiotics. The investigators looked at the prescription pattern across 12 months.

Most patients were classified as ‘rare intermittent’ (n=349) or ‘intermittent’ (n=166). Another 123 patients were categorised as ‘chronic antibiotic-responsive’, and the final 24 patients were so-called ‘chronic antibiotic-dependent’ (see Figure). Those with any ‘chronic antibiotic’ classification were more likely to have received anti-TNF therapy prior to colectomy (OR 2.05; 95% CI 1.41–2.99) and had more frequently been treated with antibiotics in the 12 months before IPAA (OR 1.62; 95% CI 1.10–2.38).

Figure: Antibiotic use patterns in the 12 months following an initial episode of pouchitis [1]



“There are suggestions that there is a continuum of severe disease from a pre-colectomy state among patients who go on and develop chronic pouchitis, as indicated by prior anti-TNF exposure and prior use of antibiotics,” argued Dr Barnes. “Identifying these high-risk patients is a first step to provide secondary prevention and reduce disease burden.”

1. Barnes EL, et al. Identifying clusters of antibiotic use patterns after the first episode of pouchitis in a population-based cohort. OP32, 20th Congress of ECCO, 19–22 February 2025, Berlin, Germany.

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Posted on 8 April 20258 April 2025