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Completed Phase 1 Interventional Accepts healthy volunteers

Evaluation of a Single Vaccination of One of Three Ascending Dose Levels of a 4-Antigen Staphylococcus Aureus Vaccine (SA4Ag) and a Single Dose Level of a 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) in Healthy Adults Aged 65 to <86 Years

ClinicalTrials.gov ID: NCT01643941

Public ClinicalTrials.gov record NCT01643941. 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 18, 2026, 5:24 PM 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 1/2 Placebo-controlled, Randomized, Double-blind Trial To Evaluate The Safety, Tolerability, And Immunogenicity Of 3 Ascending Dose Levels Of A 4-antigen Staphylococcus Aureus Vaccine (sa4ag) And A Single Dose Level Of A 3-antigen Staphylococcus Aureus Vaccine (sa3ag) In Healthy Adults Aged 65 To <86 Years

Brief summary

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

This is a Phase 1 and Phase 2 study of a single vaccination with one of three dose levels of a 4-antigen investigational vaccine against Staphylococcus aureus (SA4Ag) and a single dose level of a 3-antigen Staphylococcus aureus vaccine (SA3Ag). The main goal of the study is to determine how safe and well tolerated the vaccine is as well as to describe the immune response elicited by the vaccine in healthy adults aged 65 to \<86 years. In addition, the study aims to assess the effect of the Staphylococcus aureus vaccine on the presence of the Staphylococcus aureus within the nose, throat and perineal skin of healthy adults aged 65 to \<86 years.

Study identification

NCT ID
NCT01643941
Recruitment status
Completed
Study type
Interventional
Phase
Phase 1
Lead sponsor
Pfizer
Industry
Enrollment
284 participants

Conditions and interventions

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
Aug 2012 (Type not available)
Primary completion
May 2013 (Actual)
Completion
Mar 2014 (Actual)
Last update posted
Mar 4, 2019

2012 – 2014

United States locations

U.S. sites
7
U.S. states
6
U.S. cities
7
Facility City State ZIP Site status
Broward Research Group Hollywood Florida 33024 —
Miami Research Associates South Miami Florida 33143 —
Vince and Associates Clinical Research Overland Park Kansas 66212 —
PMG Research of Raleigh, LLC Cary North Carolina 27518 —
Cincinnati Children's Hospital Medical Center Gamble Program for Clinical Studies Cincinnati Ohio 45206 —
Vanderbilt University Medical Center Nashville Tennessee 37232 —
Benchmark Research Austin Texas 78705 —

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 NCT01643941, 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 Mar 4, 2019 · Synced Oct 18, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT01643941 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →