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Completed

NCT Number: NCT02117570

A Study To Investigate A Clostridium Difficile Vaccine In Healthy Adults Aged 50 to 85 Years, Who Will Each Receive 3 Doses Of Vaccine.

This study will investigate a Clostridium difficile vaccine in healthy adults aged 50 to 85 years, who will each receive 3 doses of vaccine. The study will assess the safety and tolerability of the vaccine, and also look at the subjects' immune response to the vaccine.

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Key information

Conditions

Clostridium Difficile Associated Disease

Age range

50 year–85 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Avail Clinical Research, LLC, DeLand, Florida, United States

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Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Healthy male and female subjects aged 50 to 85 years

Exclusion criteria

Proven or suspected prior episode of Clostridium difficile associated diarrhea.

Unstable chronic medical condition or disease requiring significant change in therapy or hospitalization for worsening disease within 8 weeks before receipt of study vaccine.

Any contraindication to vaccination or vaccine components, including previous anaphylactic reaction to any vaccine or vaccine-related components.

Treatment and study plan

Clostridium difficile vaccine

Biological

0.5 mL intramuscular injection on day 1, day 8, and day 30.

Placebo

Biological

Placebo (0.9 percent saline) given as a 0.5 mL intramuscular injection on day 1, day 8, and day 30.

Primary outcomes

  1. Percentage of Participants Reporting Prespecified Local Reactions Within 7 Days After Dose 1 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 1 vaccination to within 7 days after Dose 1

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  2. Percentage of Participants Reporting Prespecified Local Reactions Within 14 Days After Dose 2 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 2 vaccination to within 14 days after Dose 2

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  3. Percentage of Participants Reporting Prespecified Local Reactions Within 14 Days After Dose 3 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 3 vaccination to within 14 days after Dose 3

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  4. Percentage of Participants Reporting Systemic Events Within 7 Days After Dose 1 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 1 vaccination to within 7 days of Dose 1

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  5. Percentage of Participants With A Systemic Event Within 14 Days of Dose 2 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 2 vaccination to within 14 days after Dose 2

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  6. Percentage of Participants Reporting Systemic Events Within 14 Days After Dose 3 (50- to 64-Year Age Cohort)

    Time frame: From Day of Dose 3 vaccination to within 14 days after Dose 3

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  7. Percentage of Participants Reporting Adverse Events (AEs) to Month 2 and Serious AEs (SAEs) to Month 13 (50- to 64-Year Age Cohort)

    Time frame: AEs: From informed consent to Visit 6 (Month 2). SAEs: From informed consent to Visit 9 (Month 13)

    An AE is any untoward medical occurrence in a clinical investigation participant administered a product or medical device; the event need not necessarily have a causal relationship with the treatment or usage. An SAE is any untoward medical occurrence at any dose that results in death, persistent or significant disability/incapacity, or congenital anomaly/birth defect; is life-threatening; or requires or prolongs inpatient hospitalization.

  8. Percentage of Participants With A Local Reaction Within 7 Days of Dose 1 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 1 vaccination to within 7 days of Dose 1

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  9. Percentage of Participants With A Local Reaction Within 14 Days After Dose 2 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 2 vaccination to 14 days after Dose 2

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  10. Percentage of Participants With A Local Reaction Within 14 Days After Dose 3 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 3 vaccination to 14 days after Dose 3

    Pain at injection site: mild=does not interfere with activity; moderate=interferes with activity; severe=prevents daily activity; Grade 4=emergency department visit or hospitalization. Redness/swelling: Mild=2.5 to 5.0 cm; moderate= >5.0 to 10.0 cm; severe= >10 cm; Grade 4=necrosis or exfoliative dermatitis for redness category and only necrosis for swelling category. Any local reaction=any pain at the injection site, any swelling, or any redness.

  11. Percentage of Participants With A Systemic Event Within 7 Days of Dose 1 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 1 vaccination to within 7 days of Dose 1

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  12. Percentage of Participants With a Systemic Event Within 14 Days of Dose 2 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 2 vaccination to within 14 days after Dose 2

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  13. Percentage of Participants Reporting Systemic Events Within 14 Days After Dose 3 (65- to 85-Year Age Cohort)

    Time frame: From Day of Dose 3 vaccination to within 14 days after Dose 3

    Fever=temperature ≥38.0°C (100.4°C): Mild=38.0°C to 38.4°C (100.4°F-101.1°F); moderate=38.5°C to 38.9°C (101.2°F-102.0°F); severe=39.0°C to 40.0°C (102.1°F-104.0°F); Grade 4= >40.0°C (>104.0°F). Vomiting: Mild=1 to 2 times in 24 hours; moderate= >2 times in 24 hours; severe=requires intravenous hydration; Grade 4=emergency department visit or hospitalization for hypotensive shock. Diarrhea: Mild=2 to 3 loose stools in 24 hours; moderate=4 to 5 loose stools in 24 hours; severe= ≥6 loose stools in 24 hours; Grade 4=emergency department visit or hospitalization. Headache, fatigue, new or worsening joint or muscle pain: Mild=no interference with activity; moderate=some interference with activity; severe=significant interference with activity, prevents daily activity; Grade 4=emergency department visit or hospitalization. Any systemic event: Fever ≥38.0°C, vomiting, diarrhea, headache, fatigue, or new or worsening muscle or joint pain.

  14. Percentage of Participants Reporting Adverse Events (AEs) to Month 2 and Serious AEs (SAEs) to Month 13 (65- to 85-Year Age Cohort)

    Time frame: AEs: From informed consent to Visit 6 (Month 2). SAEs: From informed consent to Visit 9 (Month 13)

    An AE is any untoward medical occurrence in a clinical investigation participant administered a product or medical device; the event need not necessarily have a causal relationship with the treatment or usage. An SAE is any untoward medical occurrence at any dose that results in death, persistent or significant disability/incapacity, or congenital anomaly/birth defect; is life-threatening; or requires or prolongs inpatient hospitalization.

Sponsors and collaborators

Lead sponsor

Pfizer

Industry

Registry information

Official study title

A Phase 2, Placebo-controlled, Randomised, Observer-blinded Trial To Evaluate The Safety, Tolerability And Immunogenicity Of A Clostridium Difficile Vaccine Administered As A 3-dose Regimen In Healthy Adults Aged 50 To 85 Years

Important dates

Study start
2014
Primary completion
2015
Study completion
2015
First posted
Apr 21, 2014
Registry last updated
Jan 30, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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