{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Clostridium+difficile+Vaccine",
    "query": {
      "intervention": "Clostridium difficile Vaccine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 14,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Clostridium+difficile+Vaccine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-16T10:28:41.840Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT02052726",
      "title": "A Study To Investigate A Clostridium Difficile Vaccine In Healthy Adults Aged 50 To 85 Years, Who Will Each Receive 3 Doses Of Vaccine.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Clostridium Difficile"
      ],
      "interventions": [
        {
          "name": "C. difficile vaccine with adjuvant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "50 Years to 85 Years"
      },
      "enrollment_count": 184,
      "start_date": "2014-01-22",
      "completion_date": "2015-05-05",
      "has_results": false,
      "last_update_posted_date": "2018-12-04",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 6,
      "location_summary": "Overland Park, Kansas • Cary, North Carolina • Raleigh, North Carolina + 2 more",
      "locations": [
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Cary",
          "state": "North Carolina"
        },
        {
          "city": "Raleigh",
          "state": "North Carolina"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02052726"
    },
    {
      "nct_id": "NCT03579459",
      "title": "Evaluation Of Clostridium Difficile Vaccine Lot Consistency In Healthy Adults 65 To 85 Years Of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clostridium Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 1317,
      "start_date": "2018-07-31",
      "completion_date": "2019-08-06",
      "has_results": true,
      "last_update_posted_date": "2023-01-19",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 24,
      "location_summary": "Mobile, Alabama • Redding, California • Coral Gables, Florida + 20 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Redding",
          "state": "California"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03579459"
    },
    {
      "nct_id": "NCT01230957",
      "title": "Study of Different Formulations of a Clostridium Difficile Toxoid Vaccine Given at Three Different Schedules in Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Clostridium Difficile Infection",
        "Diarrhea"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile toxoids A and B (Low-dose with adjuvant)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Clostridium difficile toxoids A and B (Low-dose without adjuvant)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Clostridium difficile toxoids A and B (high-dose with adjuvant)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Clostridium difficile toxoids A and B (high-dose without adjuvant)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo: 0.9% normal saline",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "40 Years to 75 Years"
      },
      "enrollment_count": 650,
      "start_date": "2010-10",
      "completion_date": "2013-03",
      "has_results": false,
      "last_update_posted_date": "2018-07-18",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 30,
      "location_summary": "Redding, California • Bristol, Connecticut • Stamford, Connecticut + 25 more",
      "locations": [
        {
          "city": "Redding",
          "state": "California"
        },
        {
          "city": "Bristol",
          "state": "Connecticut"
        },
        {
          "city": "Stamford",
          "state": "Connecticut"
        },
        {
          "city": "Clearwater",
          "state": "Florida"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01230957"
    },
    {
      "nct_id": "NCT02561195",
      "title": "A Study To Investigate Two 3-dose Schedules Of A Clostridium Difficile Vaccine In Healthy Adults Aged 65 to 85 Years",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Clostridium Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 300,
      "start_date": "2015-07-16",
      "completion_date": "2020-02-13",
      "has_results": true,
      "last_update_posted_date": "2021-03-08",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 17,
      "location_summary": "DeLand, Florida • Hollywood, Florida • South Miami, Florida + 11 more",
      "locations": [
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "South Miami",
          "state": "Florida"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02561195"
    },
    {
      "nct_id": "NCT02316470",
      "title": "Dose-Confirmation, Immunogenicity and Safety Study of the Clostridium Difficile Vaccine Candidate VLA84 in Healthy Adults Aged 50 Years and Older. Phase II Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Clostridium Difficile"
      ],
      "interventions": [
        {
          "name": "VLA84",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Valneva Austria GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 500,
      "start_date": "2014-12",
      "completion_date": "2015-10",
      "has_results": true,
      "last_update_posted_date": "2017-06-08",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 7,
      "location_summary": "Huntsville, Alabama • Chula Vista, California • La Mesa, California + 4 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Chula Vista",
          "state": "California"
        },
        {
          "city": "La Mesa",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "Melbourne",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02316470"
    },
    {
      "nct_id": "NCT00214461",
      "title": "Safety, Tolerability, and Immunogenicity of a Clostridium Difficile Toxoid Vaccine in Healthy Elderly Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Clostridium Infections"
      ],
      "interventions": [
        {
          "name": "Vaccine diluent buffer (Placebo)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "C. difficile toxoid vaccine (2 µg)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "C. difficile toxoid vaccine (10 µg)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "C. difficile toxoid vaccine (50 µg)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 48,
      "start_date": "2005-11",
      "completion_date": "2006-02",
      "has_results": true,
      "last_update_posted_date": "2012-04-11",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 2,
      "location_summary": "Orlando, Florida • Lexington, Kentucky",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00214461"
    },
    {
      "nct_id": "NCT07282665",
      "title": "A Study to Learn About a Clostridioides Difficile Vaccine in People 65 Years of Age and Older",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clostridoides Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "C.difficile vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Saline Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 32500,
      "start_date": "2025-12-10",
      "completion_date": "2029-06-07",
      "has_results": false,
      "last_update_posted_date": "2026-09-09",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 141,
      "location_summary": "Athens, Alabama • Guntersville, Alabama • Huntsville, Alabama + 89 more",
      "locations": [
        {
          "city": "Athens",
          "state": "Alabama"
        },
        {
          "city": "Guntersville",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Chinle",
          "state": "Arizona"
        },
        {
          "city": "Chinle",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07282665"
    },
    {
      "nct_id": "NCT02117570",
      "title": "A Study To Investigate A Clostridium Difficile Vaccine In Healthy Adults Aged 50 to 85 Years, Who Will Each Receive 3 Doses Of Vaccine.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Clostridium Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "50 Years to 85 Years"
      },
      "enrollment_count": 185,
      "start_date": "2014-07",
      "completion_date": "2015-12",
      "has_results": true,
      "last_update_posted_date": "2017-01-30",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 12,
      "location_summary": "DeLand, Florida • Savannah, Georgia • Stockbridge, Georgia + 9 more",
      "locations": [
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Savannah",
          "state": "Georgia"
        },
        {
          "city": "Stockbridge",
          "state": "Georgia"
        },
        {
          "city": "Norfolk",
          "state": "Nebraska"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02117570"
    },
    {
      "nct_id": "NCT01887912",
      "title": "Study of a Candidate Clostridium Difficile Toxoid Vaccine in Subjects at Risk for C. Difficile Infection",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clostridium Difficile Infection"
      ],
      "interventions": [
        {
          "name": "C. difficile Toxoid Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo: 0.9% normal saline",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 9302,
      "start_date": "2013-07-30",
      "completion_date": "2018-06-12",
      "has_results": true,
      "last_update_posted_date": "2022-03-28",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 142,
      "location_summary": "Huntsville, Alabama • Mobile, Alabama • Flagstaff, Arizona + 124 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Flagstaff",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Surprise",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01887912"
    },
    {
      "nct_id": "NCT03918629",
      "title": "Clostridium Difficile Vaccine 2-Dose Versus 3-Dose Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clostridium Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 1994,
      "start_date": "2019-04-01",
      "completion_date": "2020-12-22",
      "has_results": true,
      "last_update_posted_date": "2024-01-10",
      "last_synced_at": "2026-09-16T10:28:41.840Z",
      "location_count": 52,
      "location_summary": "Athens, Alabama • Huntsville, Alabama • Chandler, Arizona + 43 more",
      "locations": [
        {
          "city": "Athens",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03918629"
    }
  ]
}