Impact of Probiotics for Reducing Infections in Veterans (IMPROVE): Study protocol for a double-blind, randomized controlled trial to reduce carriage of Staphylococcus aureus

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• 作者：Shoshannah Eggers ; BS^a ; ^b ; ^c ; Anna Barker ; BA^c ; Susan Valentine ; RN ; MS^a ; Timothy Hess ; PhD^a ; ^b ; Megan Duster ; BS ; MT (ASCP)^b ; Nasia Safdar ; MD ; PhD^a ; ^c ; ^d ; ^{nasia.safdar@va.gov}
• 关键词：CFU ; colony-forming units ; DSMC ; Data and Safety Monitoring Committee ; GI ; gastrointestinal ; ICU ; intensive care unit ; IMPROVE ; Impact of Probiotics for Reducing Infections in Veterans ; MRSA ; Methicillin-resistant Staphylococcus aureus ; MSSA ; Methicillin-susceptible Staphylococcus aureus ; PCR ; polymerase chain reaction ; PMN ; polymorphonuclear ; VA ; Veterans Affairs ; VAMC ; William S. Middleton Veterans Affairs Hospital ; VFW ; Veterans of Foreign Wars
• 刊名：Contemporary Clinical Trials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：52
• 期：Complete
• 页码：39-45
• 全文大小：700 K
• 卷排序：52

文摘

Staphylococcus aureus (S. aureus) is an organism of great public health importance, causing 20,000 deaths annually. Decolonization of patients with S. aureus may prevent infections, yet current options are limited to antimicrobials that promote antibiotic resistance and can cause adverse side effects. Probiotics have potential to reduce colonization of pathogenic bacteria, representing a promising alternative for S. aureus decolonization, but thus far lack rigorous evaluation.MethodsPotential subjects were recruited from inpatient and outpatient settings within a VA medical center and screened for S. aureus gastrointestinal (GI) or extra-GI colonization using swabs at multiple body sites. Positive, eligible, consenting participants were stratified by colonization site and randomized in a 1:1 ratio to 4-weeks of daily placebo or Lactobacillus rhamnosus (L. rhamnosus) HN001 probiotic treatment. Blood and stool samples, and treatment adherence reports were collected from each subject throughout the study, along with a final set of swabs at study completion to detect S. aureus carriage. The outcomes of this study are GI or extra-GI carriage by S. aureus at the end of 4 weeks of therapy, change in phagocytic activity of polymorphonuclear cells from pre-intervention to post-intervention, and symptomatic S. aureus infection at any site during the study period.Conclusion114 participants have been recruited for this study. Analysis of outcomes is underway. This is the first clinical trial to examine the efficacy of L. rhamnosus HN001 for decolonization of S. aureus, and investigates the mechanism by which L. rhamnosus HN001 mediates its effect on S. aureus colonization.ClinicalTrials.govIdentifierNCT01321606