Clinical Pilot Trial on the Effect of a Probiotic Fermented Drink on Antibiotic-associated Diarrhea (AAD)

Helicobacter p. positive subjects aged ≥18 years with an indication for Helicobacter pylori (Hp) eradication recommended by a gastroenterologist should be included in the study. Subjects should be willing to consume 2 servings of the study product per day for 6 weeks, and to undergo an Hp eradication therapy for 14 days starting with the consumption period.

Inclusion criteria

• Individuals, both genders, aged ≥ 18 y
• Helicobacter p. infected individuals, to which eradication therapy has been recommended by gastroenterologists
• Willingness to undergo the Helicobacter p. eradication therapy
• Willingness to abstain from food and supplements containing probiotics, prebiotics and fermented products except the study product
• Written informed consent

Exclusion criteria

• Subjects currently enrolled in another interventional trial
• subjects having finished another interventional trial within the last 4 weeks before inclusion
• incapacity to comply with the study protocol
• allergy or hypersensitivity to any component of the test product (allergy against milk protein)
• allergy or hypersensitivity to any component of the eradication therapy (e.g. penicillin allergy)
• acute GIT infections
• chronic inflammatory bowel diseases (IBD)
• irritable bowel syndrome (IBS)
• any episode of diarrhea according to WHO criteria during the last 4 weeks before inclusion
• history of lactose intolerance
• severe chronic disease (cancer, malabsorption, malnutrition, severe chronic inflammatory diseases (except chronic gastritis), renal, hepatic or cardiac diseases, artificial cardiac valve, COPD, respiratory insufficiency)
• history of active or persistent hepatitis B and C
• known congenital, acquired or iatrogenic immunodeficiency (e.g. HIV, chemotherapy, immunosuppression)
• systemic treatment with antibiotics during the last 4 weeks before inclusion
• systemic treatment likely influencing absorption, metabolism and excretion of food ingredients (metoclopramide, laxatives, body weight management and/or medication etc.)
• systemic treatment likely interfering or influencing effectiveness of the eradication drugs used e.g. ergotamine, statins, clopidogrel
• regular medical treatment including OTC, which may have impact on the study aims (e.g. probiotics, antibiotic drugs, laxatives etc.)
• severe neurological, cognitive or psychiatric diseases
• surgery or intervention requiring general anaesthesia within 2 months before the study
• vegan
• eating disorders (e.g. anorexia, bulimia)
• present alcohol and drug abuse
• pregnancy or lactation
• legal incapacity
• blood parameters:

• Hb < 12 g/dL
• liver transaminases (ALT, AST) > 2-fold increased
• serum creatinine out of the normal range
• subjects who are scheduled to undergo hospitalization during the study period