Rotavirus Infection, Evidence of PCV-1 Replication and/or Immune Response to the PCV-1 in HRV Vaccinated Infants
Conditions
Keywords
Laboratory evaluations, infants, Porcine circovirus type 1 (PCV-1), serologic response, human rotavirus (HRV) vaccine
Brief summary
This study aims to test the clinical samples (stool and serum) previously collected during clinical development of HRV vaccine, to identify if there is any evidence of PCV-1 replication and/or immune response to the PCV-1 in vaccinated infants.
Detailed description
Serum and stool samples collected from 4 clinical trials previously conducted for HRV vaccine (Rotarix™) are used in this study.
Interventions
Stool samples collected at pre-determined time points in previous studies will be analysed to detect the presence of PCV-1 DNA and pattern of detection.
Serum samples collected at pre and post vaccination time points in previous studies will be assessed for Anti-PCV-1 antibody.
Sponsors
Study design
Eligibility
Inclusion criteria
* Subjects enrolled previously in randomized, double-blind and placebo-controlled studies 444563/022 (NCT00263666), 444563/033 (NCT00757770), 103477 (NCT00169455), and 104480 (NCT00137930); * Infants aged 6 to 12 weeks at Dose 1 vaccinated with either HRV vaccine or placebo; * Infants for whom sufficient residual volume of the stool samples at predetermined time points is available; * Infants for whom sufficient residual volume of the pre and post vaccination blood samples is available.
Exclusion criteria
\- Not applicable
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Presence of PCV-1 DNA and pattern of detection in the stool samples collected | At pre-defined time points after vaccination (3-7 time points up to day 45 after vaccination) |
| Presence of serum anti-PCV-1 antibody | At pre and post vaccination time points (At Day 0 and 2 Months after last dose vaccination) |