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John D Clemens1, G Balakrish Nair2, Tahmeed Ahmed3

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Cholera, a severe diarrheal disease, still causes 100,000 deaths annually despite effective rehydration therapies. New oral vaccines, leveraging intestinal immunity, offer protection against this persistent global health threat.

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Area of Science:

  • Infectious Diseases
  • Public Health
  • Vaccinology

Background:

  • Cholera is an acute, watery diarrheal illness caused by Vibrio cholerae O1 or O139 serogroups.
  • Historically, cholera has caused multiple global pandemics originating from the Ganges Delta and Indonesia.
  • Despite advances in rehydration therapy reducing case fatality to below 1%, cholera still causes an estimated 100,000 deaths yearly, primarily in developing nations.

Purpose of the Study:

  • To provide an overview of cholera, including its epidemiology, historical impact, and current public health significance.
  • To highlight the advancements in cholera case management and the development of effective vaccines.
  • To discuss the role of local intestinal immunity in developing protective cholera vaccines.

Main Methods:

  • Review of historical data on cholera pandemics and mortality.
  • Analysis of current epidemiological data on cholera incidence and mortality.
  • Summary of scientific understanding of cholera pathogenesis and immune responses.
  • Overview of cholera vaccine development and stockpiling.

Main Results:

  • Case fatality for cholera has been reduced to less than 1% through oral and intravenous rehydration.
  • An estimated 100,000 deaths from cholera occur annually, predominantly in endemic regions of developing countries.
  • Safe and effective oral cholera vaccines, based on understanding of intestinal immunity, have been developed and are stockpiled globally.

Conclusions:

  • Cholera remains a significant global health challenge, particularly in low-resource settings.
  • Oral rehydration therapy has dramatically improved cholera survival rates.
  • Development of oral cholera vaccines represents a major advancement in controlling both epidemic and endemic cholera.