Background: Immune modulating therapies are associated with an increased risk of infections and malignancies. This is of particular concern in elderly inflammatory bowel disease patients. This study aims to compare the safety and efficacy of vedolizumab between young and elderly inflammatory bowel disease patients.Methods: A binational, multicentre, retrospective, cohort study was performed from 2015 to 2019. Patients who underwent treatment with vedolizumab and were followed for at least 14 weeks were studied. They were divided according to age into groups: 40 years or less or 60 years or older. Clinical and endoscopic responses at weeks 14 and 52 and infection development were compared between young and elderly inflammatory bowel disease patient groups.Results: There were 144 patients (82 Crohn’s disease and 62 ulcerative colitis) in the elderly cohort and 140 patients (83 Crohn’s disease and 57 ulcerative colitis) in the young cohort. The average age was 70.2 ± 7.3 years and 29.6 ± 5.7 years, respectively. Clinical and endoscopic responses were comparable between the groups (week 52 remission of Crohn’s disease: 40% vs. 35%, P = 0.7; week 52 remission of ulcerative colitis: 48% vs. 51%, P = 0.84). Previous anti‐tumour necrosis factor biological therapy was independently associated with poor clinical remission rates at week 52 (Crohn’s disease: odds ratio 0.23, 95% confidence interval 0.06–0.79; P = 0.02 and ulcerative colitis: odds ratio 0.10 95% confidence interval 0.01–0.74; P = 0.024). There were significantly more infections in the elderly cohort (2% vs. 12%, P = 0.002), none of which were fatal.Conclusions: Vedolizumab is equally effective in elderly and young inflammatory bowel disease patients. The findings of this study demonstrate an increased risk of infections among the elderly treated with vedolizumab, which may be related to their age and underlying diseases.

The human body contains trillions of microbes which generally live in symbiosis with the host. The interaction of the gut microbiome with elements of the host immune system has far-reaching effects in the development of normal gut and systemic immune responses. Disturbances to this intricate relationship may be responsible for a multitude of gastrointestinal and systemic immune mediated diseases. This review describes the development of the gut microbiome and its interaction with host immune cells in both health and disease states.

The Crohn’s Disease (CD) exclusion diet (CDED) has been shown to induce remission in pediatric and adult patients with CD. In this retrospective cohort study, we describe our real-world experience with the CDED at the inflammatory bowel disease (IBD) unit of the Tel Aviv Medical Center between 2018–2021. CD patients with multiple clinical presentations and disease phenotypes who initiated the diet were included. Indications for treatment, medical and nutritional data were collected from dietician clinic visits and medical records. Clinical and biomarker responses were determined. The CDED was recommended to 220 CD patients. Seventy-two patients were included in the analysis for a clinically active disease (n = 48) or for remission maintenance (n = 24). Among patients with a clinically active disease, 62.5% of patients achieved clinical remission at week 6 and at week 12. A positive association between high adherence to the CDED and clinical remission at week 12 was observed (adjusted OR = 7.6, 95% CI 1.07–55.2, p = 0.043). Among patients treated for remission maintenance, remission at week 12 was maintained among 83.3% of patients. We conclude that the CDED may be a promising intervention for multiple CD presentations and indications. These findings should be further validated in larger, prospective, controlled studies.

Ozanimod has recently received US Food and Drug Administration approval for moderate-to-severe ulcerative colitis. Treatment of acute severe colitis remains a clinical challenge, and although many patients respond to cyclosporine therapy, there remains a relative paucity of maintenance options. This case report describes the first reported, successful use of ozanimod after hospitalization for acute severe ulcerative colitis and in tandem with cyclosporine. Although a longer follow-up is required, this report shows the feasibility of ozanimod in this clinical setting.

Background: Educating patients regarding thier inflammatory bowel disease (IBD) is important for their empowerment and disease management. We aimed to develop a questionnaire to evaluate patient understanding and knowledge of IBD.Methods: We have developed the Understanding IBD Questionnaires (U‐IBDQ), consisting of multiple‐choice questions in two versions [for Crohn's disease (CD) and ulcerative colitis (UC)]. The questionnaires were tested for content and face validity, readability, responsiveness and reliability. Convergent validity was assessed by correlating the U‐IBDQ score with physician's subjective assessment scores. Discriminant validity was assessed by comparison to healthy controls (HC), patients with chronic gastrointestinal (GI) conditions other than IBD, and to GI nurses. Multivariate analysis was performed to determine factors associated with a high level of disease understanding.Results: The study population consisted of IBD patients (n = 106), HC (n = 35), chronic GI disease patients (n = 38) and GI nurses (n = 19). Mean U‐IBDQ score among IBD patients was 56.5 ± 21.9, similar for CD and UC patients (P = 0.941), but significantly higher than that of HC and chronic GI disease patients and lower than that of GI nurses (P < 0.001), supporting its discriminant validity. The U‐IBDQ score correlated with physician's subjective score (r = 0.747, P < 0.001) and was found to be reliable (intra‐class correlation coefficient = 0.867 P < 0.001). Independent factors associated with high U‐IBDQ scores included academic education (OR = 1.21, 95% CI 1.10–1.33, P < 0.001), biologic therapy experience (OR = 1.24, 95% CI 1.01–1.53, P = 0.046), and IBD diagnosis at <21 years of age (OR = 2.97, 95% CI 1.05–8.87, P = 0.050).Conclusions: The U‐IBDQ is a validated, reliable and short, self‐reported questionnaire that can be used for assessing understanding of disease pathophysiology and treatment by IBD patients.