Predictors of Poor Immune Response to Rotavirus Vaccine in Infants
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 400
- 试验地点
- 2
- 主要终点
- Proportion of subjects who seroconvert as measured by a 4-fold rise in serum anti-VP6 IgA antibodies between baseline and 4 weeks after the second dose of Rotarix®.
研究概览
简要总结
This will be a randomized study with the primary objective of assessing the impact of withholding versus encouraging breastfeeding on the immunogenicity of Rotarix® in infants.
Enrolled subjects will all be administered Rotarix®, at ages 6 to 7 weeks, and at10 -14 weeks. The subjects will be randomized into one of the two study arms. In one of the group caregivers will be advised to breastfeed immediately prior to and after each dose of the vaccine while in the other group caregivers will be advised to withhold breastfeeding for 30 minutes before and after each dose of the vaccine. The other childhood vaccines i.e. OPV and Pentavalent will be administered at least 30 minutes after administration of Rotarix®, The enrolled subjects will be followed up for 4 weeks after the 2nd dose of Rotarix®.
详细描述
Infants ≤7 weeks and pregnant women will be identified through a household survey.Families of infants aged 6-7 weeks will be called to the study clinic for consenting, screening and enrollment.All enrolled subjects will be administered 2 doses of Rotarix® at 6 to 7 weeks and at 10-14 weeks of age. Other childhood vaccines will also be offered.
At enrollment, a blood specimen and breast milk specimen will be obtained from the mother and a blood, salivary and stool specimens will be obtained from the subject before administering the Rotarix® vaccine.
At the time of the 2nd administration, a breast milk specimen will be obtained from the mother and a salivary specimen will be obtained from the subject before administering the Rotarix® vaccine. At 28 days (±) 5 after the 2nd dose of Rotarix® vaccine, a blood, salivary and stool specimen will be obtained from the subject.
Whenever the family comes to the study clinic at 6-7 weeks, consent will be administered and a clinical examination conducted.If the family is willing for the mother and the child to be part of the study and the child meets the eligibility criteria, the child will be enrolled.
Depending on the group allocation the mothers will be advised to withhold or encourage breastfeeding for 30 minutes before and after receipt of Rotarix®.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 6 Weeks 至 7 Weeks（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •At least one parent(s) or legally acceptable representative's consent for participation and are able to understand study procedures
- •Subjects aged 6 to 7 weeks at recruitment
- •No plans to move in the next 4 months
- •Weight for age not ≤ -3 SD of WHO child growth standards
排除标准
- •Infant not breastfed
- •Administration of rotavirus vaccine in the past
- •Known immunodeficiency disease, including HIV infection in the subject or the mother
- •Known chronic enteric disease
- •Diarrhea on the day of enrollment (temporary exclusion)
- •Any illness requiring hospitalization (temporary exclusion)
- •Any other conditions which in the judgment of the investigator warrant exclusion (e.g. no exclusion criteria but seems 'ill', investigators suspects neglect)
结局指标
主要结局
Proportion of subjects who seroconvert as measured by a 4-fold rise in serum anti-VP6 IgA antibodies between baseline and 4 weeks after the second dose of Rotarix®.
时间窗: 14-18 weeks of age
次要结局
- Concentration of anti-VP6 antibodies in saliva of subjects before the first and second dose of Rotarix®. Proportion of subjects with enteric pathogens detected in stools. Vitamin D status of subjects enrolled in the study.(14-18 weeks of age)