CI

At a glance

ClinicalIndex Comparison Record
Early Ph 1Completed· 60 enrolled
Drug / intervention
Ty21a Typhoid Fever Vaccine +2 morebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04543877
NCT04543877Early Ph 1Completed

WHNRC (Western Human Nutrition Research Center) Fiber Intervention Study

USDA, Western Human Nutrition Research Center·interventional·Posted Sep 10, 2020·Updated Dec 17, 2025

In Brief

A Early Phase 1 clinical trial evaluating Inulin, Maltodextrin, and 1 other intervention for Inflammation and 3 related conditions. Completed, enrolled 60 participants across 1 site.

Detailed Summary

The purpose of this study is to determine if adding dietary fiber, such as inulin, to a diet that does not have enough fiber would raise the levels of potentially beneficial bacteria, such as Bifidobacterium, in the gut. There is evidence to suggest that these microbes can affect gut health and immune response, including to vaccines. The investigators will examine how inulin in the diet (compared to the maltodextrin control) (1) causes changes in the composition and function of the gut microbes, (2) reduces gut inflammation and gut leakiness caused by the vaccine, (3) increases immune response to vaccination, and (4) changes the expression of important adhesion molecules on the surface of white blood cells. Intestinal and whole-body responses will be measured in all participants.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States

Timeline

Early Ph 1CompletedFinished
202120222023202420252026
First PostedSep 10, 2020
Enrollment StartSep 27, 2022
Primary CompletionJun 11, 2025
TodayJul 2, 2026
Enrollment to primary: 2.7 yearsPosted 5.8 years ago

Interventions

Inulindietary

Consume 12 grams/day of inulin for 5 weeks (Day 9 - 43).

Maltodextrindietary

Consume 12 grams/day of maltodextrin for 5 weeks (Day 9 - 43).

Ty21a Typhoid Fever Vaccinebiological

All participants will receive the vaccine. One capsule is swallowed on alternate days, e.g. days 30, 32, 34, and 36 for a total of 4 capsules.