The ongoing epidemic of cholera in Haiti is one of the largest of the last decade and is representative of a growing burden of epidemic cholera. Remarkably little is known about immune responses to cholera and oral cholera vaccines in immunologically na?ve populations, and in populations outside of historically cholera endemic areas of Asia. Of paramount importance, all decisions regarding the use of cholera vaccine have been made using immunogenicity and efficacy data generated in areas of the world where cholera has long been entrenched and where cholera vaccine may be boosting anamnestic immune responses in previously exposed individuals. Therefore, assessment of vaccine immunogenicity and effectiveness during the roll out of Shanchol in Haiti provides the unique opportunity to directly inform vaccine strategies. Almost nothing is known about the relationship between HIV and cholera, despite the fact that the largest number of cholera cases reported to WHO are now from Sub-Saharan Africa. Here, we propose to characterize immune responses to oral cholera vaccines and to V. cholerae infection in Haiti -- a previously immunologically na?ve population with host and epidemiologic features that are reflective of populations experiencing cholera epidemics in recent years. We also directly assess the efficacy of the oral cholera vaccine, Shanchol, in Haiti, and evaluate the inter-relationship between HIV and V. cholerae infection and vaccination. Our collaborative team is deeply involved in the cholera vaccine roll-out in Haiti and is uniquely situated to perform the proposed studies.

Public Health Relevance

Understanding immune responses to Vibrio cholerae vaccination and infection, and assessing vaccine effectiveness in Haiti, will directly aid our understanding of how best to utilize cholera vaccines in Haiti and in future cholera epidemics.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
1R01AI099243-01A1
Application #
8437751
Study Section
Clinical Research and Field Studies of Infectious Diseases Study Section (CRFS)
Program Officer
Hall, Robert H
Project Start
2012-09-27
Project End
2017-08-31
Budget Start
2012-09-27
Budget End
2013-08-31
Support Year
1
Fiscal Year
2012
Total Cost
$773,078
Indirect Cost
$183,877
Name
Massachusetts General Hospital
Department
Type
DUNS #
073130411
City
Boston
State
MA
Country
United States
Zip Code
02199
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