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Completed Phase 3 Interventional Accepts healthy volunteers Results available

Evaluation Of Clostridium Difficile Vaccine Lot Consistency In Healthy Adults 65 To 85 Years Of Age

ClinicalTrials.gov ID: NCT03579459

Public ClinicalTrials.gov record NCT03579459. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 22, 2026, 1:33 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A PHASE 3, PLACEBO-CONTROLLED, RANDOMIZED, OBSERVER-BLINDED STUDY TO EVALUATE THE LOT CONSISTENCY, SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A CLOSTRIDIUM DIFFICILE VACCINE IN HEALTHY ADULTS 65 TO 85 YEARS OF AGE

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This study will investigate a Clostridium difficile vaccine in healthy adults 65 to 85 years of age, who will each receive 3 doses of vaccine. The study will assess the lot consistency, safety, and tolerability of the vaccine, and also look at the subjects' immune response to the vaccine.

Study identification

NCT ID
NCT03579459
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Lead sponsor
Pfizer
Industry
Enrollment
1,317 participants

Conditions and interventions

Interventions

Biological

Eligibility (public fields only)

Age range
65 Years to 85 Years
Sex
All
Healthy volunteers
Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Jul 31, 2018 (Actual)
Primary completion
Aug 6, 2019 (Actual)
Completion
Aug 6, 2019 (Actual)
Last update posted
Jan 19, 2023

2018 – 2019

United States locations

U.S. sites
24
U.S. states
15
U.S. cities
23
Facility City State ZIP Site status
Coastal Clinical Research, Inc. Mobile Alabama 36608 —
Paradigm Clinical Research Centers, Inc. Redding California 96001 —
Clinical Research of South Florida Coral Gables Florida 33134 —
Avail Clinical Research, LLC DeLand Florida 32720 —
Research Centers of America, LLC Hollywood Florida 33024 —
Atlanta Center for Medical Research Atlanta Georgia 30331 —
Clinical Research Atlanta Stockbridge Georgia 30281 —
East-West Medical Research Institute Honolulu Hawaii 96814 —
Advanced Clinical Research Meridian Idaho 83642 —
Heartland Research Associates, LLC Wichita Kansas 67207 —
Ochsner Clinic Foundation New Orleans Louisiana 70121 —
Meridian Clinical Research, LLC Norfolk Nebraska 68701 —
Meridian Clinical Research, LLC Omaha Nebraska 68134 —
Amici Clinical Research Raritan New Jersey 08869 —
PMG Research of Charlotte, LLC Charlotte North Carolina 28209 —
PMG Research of Wilmington, LLC Wilmington North Carolina 28401 —
Lynn Health Science Institute Oklahoma City Oklahoma 73112 —
Medical Research South, LLC Goose Creek South Carolina 29445 —
Benchmark Research Austin Texas 78705 —
Diagnostics Research Group San Antonio Texas 78229 —
J. Lewis Research Inc. / Foothill Family Clinic Draper Draper Utah 84020 —
J. Lewis Research, Inc./ Foothill Family Clinic South Salt Lake City Utah 84109 —
J. Lewis Research, Incorporated/Foothill Family Clinic South Salt Lake City Utah 84121 —
J. Lewis Research, Inc. / Jordan River Family Medicine South Jordan Utah 84095 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03579459, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Jan 19, 2023 · Synced Oct 22, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT03579459 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →