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Differentiating simple from complex appendicitis in children before surgery: The Complex Appendicitis Tool (CAT)

1. Immunology and Pathology:To determine the immune response of patients with simple and complex appendicitis in order to identify markers which distinguish between simple and complex appendicitis.2.Clinical and Imaging:To analyze the differences in…

The role of the intestinal microbiome in enteric and systemic vaccine immune responses

Primary Objective: to investigate the role of the gut microbiota in RVV immune response Secondary Objectives: To investigate the role of the gut microbiota in tetanus and pneumococcal vaccine immune responses

Donor feces infusion for first episode of Clostridium difficile infection in patients at risk for recurrent infection

The primary objective of this study is to investigate whether FMT after antibiotic therapy is more effective than conventionalantibiotic therapy alone in patients with a first episode of CDI.

A randomized controlled multicenter trial of a five day course of oral colistin and neomycin followed by restoration of the gut microbiota using fecal transplantation to eradicate intestinal carriage of extended spectrum beta-lactamase or carbapenemase-producing Enterobacteriaceae in high-risk patients

The purpose of this study is to evaluate the efficacy of two antibiotics ( neomycin sulfate and colistin sulfate), followed by fecal bacteria therapy , to multidrug - resistant bacteria (E - ESBL and EPC) to be eradicated from the intestine.

Intraoperative assessment of microcirculation with Laparoscopic Laser Speckle Analysis (lapLASCA) in patients elected for colorectal surgery for prediction of anastomotic leakage in colorectal anastomoses.

Experimentally, develop a software algorithm to objectively assess the microcirculation quality of the colorectal wall, intraoperative, by laparoscopy to predict the probability of developing anastomotic leakage, with the intention to develop a…

The microbiome of Q Fever Fatigue Syndrome (QFS)

To characterize the interaction between the gut microbiome, related metabolites, immune function, and perceived complaints in QFS-patients, CFS-patients, and healthy individuals.

Transluminal Endoscopic step-up approach versus miNimally invasive SurgIcal step-up apprOach in patients with infected pancreatic Necrosis: TENSION, a randomized controlled parallel-group superiority multicenter trial. Dutch Pancreatitis Study Group.

To determine the effectiveness and, subsequently, the cost-effectiveness of a endoscopic transluminal step-up approach (ETD & ETN) versus a surgical step-up approach (PCD & VARD ,if not possible laparotomy) to improve clinical…

Effect of donor human milk on severe infections and mortality in VLBW infants, a double blind randomized controlled trial

To determine whether (supplemental) human donor milk has beneficial effects (in terms of reduction of infectious episodes and mortality) when compared to (supplemental) preterm formula during the first 10 days of life in VLBW infants. Amendement ESS…

Seroprevalence of hepatitis E virus infections among vegetarians.

In the present study we aim to test the hypothesis that the reservoir of HEV in the Netherlands are animals that are bred for meat consumption. Therefore we want to compare the HEV seroprevalence in vegetarians and in people with a very low meat/…

Antibiotic treatment alone for children with acute appendicitis; a prospective cohort study part of the Antibiotic versus Primary Appendectomy for Children with acute appendicitis; the APAC trial.

1. What is the complication rate of the initial antibiotic treatment strategy for acute simple appendicitis (radiological proven) in children aged 7-17 years old?

Pancreatitis, verY earlY compared wiTH delayed start Of eNteral feeding (PYTHON) trial: a randomised controlled multicenter trial.

To investigate whether a very early start of EN (< 24 hrs after admission), as compared to selective delayed EN (> 72 hrs), will lead to a lower rate of infectious complications and mortality in patients with predicted severe AP.

Immune respons after inactivated oral cholera vaccination (Dukoral) in kidneytransplant recipients.
Mucosal immune response in ImmunoCompromised Host (MICH)

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Novel therapies for secretory diarrhea

This study aims to assess the efficacy and potency of newly developed small molecule inhibitors of the GC-C signaling pathway and of the CFTR chloride channel in native human intestinal tissue.

The role of persistent gastrointestinal viral infections in the development of
enteropathy in children with Common Variable Immunodeficiency and secundary immunodeficiencies

To describe the prevalence of enteropathogenic viruses in children with primary (CVID and CVID-like disease) and secundary immunodeficiencies and a potential relation between this prevalence and the development of auto-/allo-immune enteropathy.

Ammonia detection in Helicobacter pylori infections with the Ammonia Breath Analyzer (ABA) demonstrator. A pilot study to investigate the clinical application of the ABA.

The aim of this study is to assess the change of ammonia exhaled in Helicobacter pylori (HP) positive patients compared with patients that are not HP infected after urea administration. In principle, in this pilot study, the results of Kearney et al…

The influence of a host genetic risk factor on H. pylori induced immune cell activation

To assess the involvement of a specific genetic risk allele on oxidative stress induced by neutrophils in relation to H. pylori infection.

STAT Trial: Stoma or Intestinal Anastomosis for Necrotizing Enterocolitis of the Neonate: Multicentre Randomized Controlled Trial

The aim of this study is to demonstrate which is the most effective operation for neonates with necrotizing enterocolitis (NEC): intestinal resection with stoma formation or intestinal resection with primary anastomosis.

MR imaging of acute appendicitis in adults

Primary Objective: To determine the sensitivity and specificity of MRI in a consecutive series of adult patients suspected for acute appendicitisSecondary Objective(s): Is MRI of additional value in adult patients with inconclusive US? And is…

Prevalence of Tropheryma whipplei in duodenum and colon, using real-time PCR

To determine the prevalence of T. whipplei in duodenum and colon in a random population of patients whom will undergo an endoscopy at the VUmc

Survey: Patient Knowledge and Preferences in Regards to Colorectal Cancer in the Setting of Ulcerative Colitis

1.What are ulcerative colitis patients* understanding of their risk of colon cancer and the benefit of colonoscopy?2. What is ulcerative colitis patients* threshold of cancer risk before accepting colectomy in the setting of dysplasia?3. What are…