Potential Mechanisms for Intussusception After Rotavirus Vaccine-Pilot Study

This is an interventional other trial for Intussusception focused on measuring mechanisms for intussusception, rotavirus vaccine Read More

Inclusion Criteria:

1. healthy infant 6 to 13 weeks (12 weeks and 6 days) of age at day of rotavirus vaccine administration
2. free of obvious health problems as established by medical history and confirmed with infant's primary physician prior to Visit 1
3. parent/legal guardian willing to have infant feed from a bottle for contrast
4. parent/legal guardian willing and capable of signing informed consent
5. parent/legal guardian and infant expected to be available for entire study
6. parent/legal guardian can be reached by telephone
7. parent/legal guardian expresses willingness to complete study procedures and receive 2 month immunizations, according to recommended schedule

Exclusion Criteria:

1. gestational age of <37 weeks
2. infant unable to fast for 4 hours prior to MRI procedure
3. receipt of any vaccine except initial HBV (must have at least 28 days between HBV and Visit 1 to be included)
4. history of severe allergic reaction to HBV vaccine

5. contraindications for any of the routine vaccines

   1. Severe Combined Immune Deficiency
   2. history of intussusception

6. precautions for either RV1 or RV5 (may interfere with study outcomes)

   a. altered immunocompetence i. infants with primary and acquired immunodeficiency states, cellular immunodeficiency, hypogammaglobulinemic and dysgammaglobulinemic states ii. infants with blood dyscrasias, leukemia, lymphomas, or other malignant neoplasms affecting the bone marrow or lymphatic system iii. infants on immunosuppressive therapy (including high-dose systemic corticosteroids) iv. infants who are HIV-exposed or infected b. acute gastroenteritis c. moderate or severe acute illness with or without fever d. pre-existing chronic gastrointestinal diseases (e.g., congenital malabsorption syndromes, Hirschsprung's disease, or short-gut syndrome) e. infants with spina bifida or bladder exstrophy (latex rubber is contained in the RV1 oral applicator)

7. sensitivity to latex (latex rubber is contained in the RV1 oral applicator)
8. febrile illness within previous 14 days (axillary temperature of 100.4◦ F or higher)
9. history of vomiting (forceful expulsion of partially digested milk/food) and/or diarrhea (3 watery stools) within 14 days of Visit 1
10. receipt of any steroids, immunoglobulins, other blood products/transfusion
11. receipt of non-steroidal anti-inflammatory drugs in previous 72 hours (may affect cytokine response)
12. receipt of an antipyretic medication (acetaminophen or ibuprofen) within 72 hours prior to the first dose of rotavirus vaccine or is already planning to administer a prophylactic antipyretic medication on the day of and the day following vaccination (this exclusion does not apply if the caretaker indicates he/she might administer antipyretics after vaccination to reduce a fever)
13. is enrolled or plans to enroll in another clinical trial with an investigational product while participating in this study (observational studies are allowed)
14. any condition which, in the opinion of the investigators, may post a health risk to the subject or interfere with the MRI or vaccine evaluation
15. currently receiving medication for gastroesophageal reflux (GERD) or any other gastrointestinal condition including colic
16. infant who is a relative of any research study personnel
17. allergy to barium

18. failed newborn hearing screening

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