13-valent Pneumococcal Conjugate Vaccine Study in Adults => 50 Years of Age in Mexico

Pfizer324 enrolled

Overview

The purpose of this study will be to assess the safety, tolerability, and immunogenicity of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) when given to healthy adults older than 50 years of age who haven't received 23-valent pneumococcal polysaccharide vaccine in Mexico.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Enrollment

324

Conditions

Pneumococcal Infections

Interventions

vaccine-13vPnCBIOLOGICAL

Single dose of 0.5 ml of 13vPnC administered in deltoid muscle of arm at visit 1 (day 1)

vaccine-13vPnCBIOLOGICAL

Single dose of 0.5 ml of 13vPnC administered in deltoid muscle of arm at visit 1 (day 1)

Eligibility

Sex: ALLMin age: 50 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Male or female older than 50 years of age * Eligibility must be determined by medical history, physical exam and clinical judgment * Able to complete an electronic diary * Available for duration of study * Negative pregnancy test for subjects in group 2 age 50 to 64 years * Practice abstinence or use reliable birth control if age is 50 to 64 years Exclusion Criteria: * History of allergic reaction to any vaccine * Previous vaccination with licensed or experimental pneumococcal vaccine * S. pneumonia infection within past 5 years before investigational product administration * Known or suspected immunodeficiency or received treatment including cytotoxic agents or systemic corticosteroids, serious chronic disorder such as malignancy cancer * Receipt of plasma products or immunoglobulins within 60 days * Bleeding conditions or diathesis * Receipt of investigational product within 28 days before study entry * Other severe acute or chronic medical or psychiatric condition

Locations (4)

Instituto Mexicano de Investigación Clínica, S.A. de C.V

México, D.f., Mexico

Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran

Mexico City, Mexico City, Mexico

Star Medica

Morelia, Michoacán, Mexico

Hospital General de Durango

Durango, Mexico

Outcomes

Primary Outcomes

Serotype-Specific Pneumococcal Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) 1 Month After Vaccination

Serotype-specific OPA GMTs for the 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) were determined in the blood samples of all the participants using a quantitative functional OPA assay. Confidence intervals (CIs) for GMT are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers. Individual OPA assay values below the assay LLOQ (lower limit of quantification) were set at a titer of 0.5\*limit of detection (LOD \[8\]) = (titer of 4) for the purpose of calculating the OPA GMT.

Time frame: One month (28 to 42 days) after vaccination

Percentage of Participants Reporting Pre-Specified Local Reactions Within 14 Days After Vaccination

Local reactions reported using an electronic diary. Redness and Swelling scaled as Any (redness present or swelling present), Mild (2.5 to 5.0 centimeters \[cm\]), Moderate (5.1 to 10.0 cm), Severe (\>10 cm). Pain at injection site scaled as Any (pain present), Mild (does not interfere with activity), Moderate (interferes with activity), Severe (prevents daily activity).

Time frame: Within 14 days after vaccination

Percentage of Participants Reporting Pre-Specified Systemic Events Within 14 Days After Vaccination

Systemic events reported using electronic diary. Fever-Any:\>=38 degrees Celsius (C), Mild (M):\>=38 to \<38.5 degrees C, Moderate(Mod):\>=38.5 to \<39 degrees C, Severe (S):\>=39 to \<=40 degrees C, Potentially life threatening:\>40 degrees C. Headache, fatigue, muscle pain, joint pain- Any: present, M:did not interfere with activity, Mod:some interference, S:activity prevented. Vomiting- Any:present, M:1-2 times/day (d), Mod:\>2/d, S:required intravenous hydration. Diarrhoea- Any:present, M:2-3 loose stools/d, Mod:4-5/d, S:\>=6/d. All reports of fever \>40 degrees C were confirmed as data entry errors.

Time frame: Within 14 days after vaccination

Percentage of Participants With Treatment-Emergent Adverse Events (AEs) or Serious Adverse Events (SAEs)

An AE was any untoward medical occurrence in a participant who received vaccine without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial/prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between vaccination and up to 1 month (28 to 42 days) after vaccination that were absent before treatment or that worsened relative to pre-treatment state.

Data from ClinicalTrials.gov

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Secondary Outcomes

Percentage of Participants Achieving Serotype-Specific Opsonophagocytic Activity (OPA) Titer With at Least Lower Limit of Quantification (LLOQ) 1 Month After Vaccination

Percentage of participants achieving OPA GMTs with at least LLOQ for 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) determined in blood samples of all participants using microcolony OPA assay. Exact 2-sided CI based on observed proportion of participants. LLOQ for each serotype: 1=1:18, 3=1:12, 4=1:21, 5=1:29, 6A=1:37, 6B=1:43, 7F=1:210, 9V=1:345, 14=1:35, 18C=1:31, 19A=1:18, 19F=1:48, 23F=1:13.

Time frame: One month (28 to 42 days) after vaccination

Serotype-Specific Pneumococcal Opsonophagocytic Activity (OPA) Geometric Mean Fold Rise (GMFR) From Pre-Vaccination to 1 Month Post-Vaccination

Geometric mean fold rises (GMFRs) for the 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) from pre-vaccination to 1 month post-vaccination were computed using the logarithmically transformed assay results. CIs for GMFR are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Time frame: Pre-vaccination to 1 month (28 to 42 days) after vaccination