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Effectiveness of Rotavirus Immunization in Nicaragua

This study has been completed.
Merck Sharp & Dohme Corp.
Thrasher Research Fund
John E. Fogarty International Center (FIC)
Information provided by (Responsible Party):
Sylvia Becker-Dreps, University of North Carolina, Chapel Hill Identifier:
First received: May 27, 2010
Last updated: September 8, 2011
Last verified: September 2011
The purpose of the investigators study is to compare the rates of childhood diarrhea at the community level before and after the rotavirus vaccination program in León, Nicaragua. From preliminary studies, the investigators anticipate about a 28% reduction in diarrhea following the vaccination program among children who received the vaccine, and a smaller reduction in diarrhea among children who did not receive the vaccine, due to the effects of "herd immunity". In addition, the investigators will collect stool samples from children who develop diarrhea in order determine the etiology of childhood diarrhea in the post-rotavirus immunization era.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Effectiveness of Rotavirus Immunization at the Community Level in Nicaragua

Resource links provided by NLM:

Further study details as provided by University of North Carolina, Chapel Hill:

Biospecimen Retention:   Samples Without DNA
Stool samples obtained from children who develop diarrhea during the course of the study. In addition, stool samples will also be collected from normal children to serve as controls in laboratory analysis.

Enrollment: 667
Study Start Date: January 2010
Study Completion Date: January 2011
Primary Completion Date: January 2011 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   up to 5 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Children under age 5 in Leon, Nicaragua

Inclusion Criteria:

  • Age under 5 years, inclusion in health and demographic surveillance system (CIDS) in Leon, Nicaragua

Exclusion Criteria:

  • Parents do not consent to child's participation
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Please refer to this study by its identifier: NCT01133808

Sponsors and Collaborators
Sylvia Becker-Dreps
Merck Sharp & Dohme Corp.
Thrasher Research Fund
John E. Fogarty International Center (FIC)
Principal Investigator: Sylvia Becker-Dreps, MD University of North Carolina, Chapel Hill
  More Information

Responsible Party: Sylvia Becker-Dreps, Assistant Professor, Department of Family Medicine, University of North Carolina, Chapel Hill Identifier: NCT01133808     History of Changes
Other Study ID Numbers: 09-0371
K01TW008401-01 ( US NIH Grant/Contract Award Number )
Study First Received: May 27, 2010
Last Updated: September 8, 2011

Keywords provided by University of North Carolina, Chapel Hill:

Additional relevant MeSH terms:
Signs and Symptoms, Digestive
Signs and Symptoms
Immunologic Factors
Physiological Effects of Drugs processed this record on April 28, 2017