Anthony O’Connor

ORCID: 0000-0003-1722-4820
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About
Contact & Profiles
Research Areas
  • Inflammatory Bowel Disease
  • Helicobacter pylori-related gastroenterology studies
  • Microscopic Colitis
  • Gastric Cancer Management and Outcomes
  • Eosinophilic Esophagitis
  • Gastrointestinal disorders and treatments
  • Colorectal Cancer Screening and Detection
  • Biosimilars and Bioanalytical Methods
  • Gastroesophageal reflux and treatments
  • Veterinary medicine and infectious diseases
  • Gastrointestinal Bleeding Diagnosis and Treatment
  • Gastrointestinal motility and disorders
  • Diagnosis and treatment of tuberculosis
  • Gastrointestinal Tumor Research and Treatment
  • Diverticular Disease and Complications
  • Pharmaceutical studies and practices
  • Autoimmune and Inflammatory Disorders
  • Colorectal Cancer Treatments and Studies
  • Galectins and Cancer Biology
  • Chronic Lymphocytic Leukemia Research
  • Monoclonal and Polyclonal Antibodies Research
  • Child Nutrition and Feeding Issues
  • Pancreatic and Hepatic Oncology Research
  • Cutaneous Melanoma Detection and Management
  • Pregnancy and Medication Impact

Tallaght University Hospital
2013-2024

Trinity College Dublin
2012-2024

University Hospital Galway
2018-2022

University College London
2022

Leeds Teaching Hospitals NHS Trust
2015-2021

Cancer Trials Ireland
2018-2020

St James's University Hospital
2014-2018

Trinity College
2018

University Gastroenterology
2009-2015

Beth Israel Deaconess Medical Center
2014-2015

Atrophic gastritis, intestinal metaplasia, and epithelial dysplasia of the stomach are common associated with an increased risk for gastric cancer. In absence guidelines, there is wide disparity in management patients these premalignant conditions. The European Society Gastrointestinal Endoscopy (ESGE), Helicobacter Study Group (EHSG), Pathology (ESP) Sociedade Portuguesa de Endoscopia Digestiva (SPED) have therefore combined efforts to develop evidence-based guidelines on precancerous...

10.1055/s-0031-1291491 article EN Endoscopy 2011-12-23

Magnetic resonance enterography (MRE) and ultrasound are used to image Crohn's disease, but their comparative accuracy for assessing disease extent activity is not known with certainty. Therefore, we did a multicentre trial address this issue.

10.1016/s2468-1253(18)30161-4 article EN cc-by ˜The œLancet. Gastroenterology & hepatology 2018-06-19

Objectives: Recently, the infliximab biosimilar (CT-P13) received market authorisation for inflammatory bowel disease (IBD), allowing cost benefits when switching to CT-P13. We aim assess efficacy and safety of from originator CT-P13 new existing patients.Material methods: Treatment response, remission, primary secondary loss response rates, adverse events in patients who initiated 12 months pre-switch (n = 53) were compared with post-switch 69). Sustained responses switched 191) those...

10.1080/00365521.2018.1464203 article EN Scandinavian Journal of Gastroenterology 2018-04-24

Background: Ipilimumab is an anticytotoxic T-lymphocyte antigen-4 (CTLA-4) monoclonal antibody used for the treatment of malignant melanoma. It can cause immune-mediated inflammatory adverse events, including diarrhoea and even intestinal perforation or death in clinical trials but there a dearth data on postmarketing outcomes. Methods: A total 546 patients attending metastatic melanoma between 1 January 2009 31 August 2015 were identified by interrogation oncology database. 83 these...

10.1177/1756283x16646709 article EN Therapeutic Advances in Gastroenterology 2016-05-12

Irish eradication rates for Helicobacter pylori are decreasing and there is an increase in the prevalence of antibiotic-resistant bacteria. These trends call into question current management strategies.To establish Working Group (IHPWG) to assess, revise tailor available recommendations.Experts areas gastroenterology microbiology were invited join IHPWG. Questions relevance diagnosis, first-line rescue therapy developed using PICO system. A literature search was performed. The 'Grading...

10.1097/meg.0000000000000822 article EN European Journal of Gastroenterology & Hepatology 2017-01-10

BACKGROUND Surveillance colonoscopies are predominantly normal, identifying patients for potential polypectomy is advantageous. AIM To assess colon capsule endoscopy (CCE) and/or faecal immunochemical test (FIT) as filters in surveillance. METHODS Patients aged ≥ 18 due polyp surveillance were invited CCE and FIT. Identifying polyps or colorectal cancer resulted a positive CCE. Significant lesions (≥ 3 6 mm polyps), incomplete studies FITs 225 ng/mL) referred endoscopy. results, FIT accuracy...

10.4253/wjge.v17.i5.101322 article EN World Journal of Gastrointestinal Endoscopy 2025-05-09

Helicobacter pylori eradication rates have fallen considerably in recent years. Antibiotic resistance is thought to be rising.To examine the levels of metronidazole (MTZ) and clarithromycin (CLA) H. pylori, isolates were taken a reference centre Ireland from 2007 2008 compared similar cohort study 1997.Antimicrobial susceptibilities tested by E-test. Frequencies spontaneous measured on an agar plate containing antibiotics at concentrations 2x 4x minimum inhibition concentration values....

10.1097/meg.0b013e328338e43d article EN European Journal of Gastroenterology & Hepatology 2010-03-30
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