Diarrhea | Trial Of Azithromycin In Campylobacter Concisus Patients With Diarrhea

Diarrhea research study

What is the primary objective of this study?

A randomized, double-blind, placebo-controlled clinical trial of azithromycin in Campylobacter concisus culture positive patients with diarrhea. The clinical characteristics of emerging Campylobacter concisus in adults is vomiting and persistent diarrhea. Whether patients may benefit from antibiotic treatment is unknown. The purpose of this trial is to investigate whether antibiotic treatment with azithromycin of Campylobacter concisus induced diarrhea can better the symptoms and shorten the duration of illness.

Who is eligible to participate?

Inclusion Criteria: - Patients with culture-positive stool sample with Campylobacter concisus - Diarrheic patients ≥ 18 years - symptoms of diarrhea defined as three or more watery stools per day or - two watery stools per day + at least one of the following symptoms: abdominal pain, nausea, vomiting or fever. - Diarrheic symptoms for a minimum of 24 hours before enrollment. - Diarrheic symptoms for a maximum of 21 days before enrollment. - Informed oral and signed written consent, with documentation that all relevant information about the study is given to the patient. - The patient must be willing and able to participate in the trial. Exclusion Criteria: - Hypersensitivity to azithromycin, erythromycin, macrolide or other ketolide-antibiotics - Pregnancy or breastfeeding (if relevant). - Culture positive stool sample with a Co-pathogen. - Treatment with other antibiotics (in any stage 21 days before the first stool sample). - Patients with severe liver disease. - Patients with severe renal impairment (GFR <10 ml / min). - Patients with congenital or documented acquired QT prolongation. - Patients treated with other active drugs that prolong the QT interval such as: antiarrhythmics of classes IA and III, cisapride and terfenadine. - Patients with electrolyte disorders, particularly hypokalemia and hypomagnesemia. - Patients with clinically relevant bradycardia, arrhythmia or severe heart failure. - Inflammatory bowel diseases - Chronic diarrhea of known cause. - Dementia. - Serious illness less than 21 days from the planned entry into the study. - Patients treated with medications that have interactions with azithromycin e.g. alkaloids, ciclosporin or amiodarone. - Patients involved in the planning or execution of the study.

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?




Abdominal Pain

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Drug:azithromycinazithromycin, oral use, 500mg per day for 3 days in total. Total dose 1500mg


Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

azithromycinazithromycin 500mg

placeboplacebo 500mg

Study Status


Start Date: March 2012

Completed Date: December 2013

Phase: Phase 3

Type: Interventional


Primary Outcome: Duration of diarrhea in days

Secondary Outcome: number of stools/day

Study sponsors, principal investigator, and references

Principal Investigator:

Lead Sponsor: University of Aarhus

Collaborator: Aalborg University Hospital

More information:

Discuss Azithromycin