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Nipah virus circulation at human-bat interfaces, Cambodia.

Julien Cappelle1, Thavry Hoem2, Vibol Hul2

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Nipah virus circulates in Cambodian fruit bats, posing potential human risks through local practices like fruit consumption and palm juice production. However, no human infections were detected, suggesting regional agricultural differences may mitigate transmission risks.

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Area of Science:

  • Zoonotic disease ecology
  • One Health approach
  • Epidemiology

Background:

  • Nipah virus (NiV) poses a significant threat for emergence in Cambodia.
  • Understanding human-bat interfaces is crucial for preventing NiV spillover.
  • Fruit bats (Pteropus lylei) are known reservoirs for NiV.

Purpose of the Study:

  • To assess NiV emergence risks in Cambodia.
  • To investigate human-bat ecological interactions.
  • To determine NiV circulation in bat and human populations.

Main Methods:

  • Ecological studies of Pteropus lylei bats (phenology, population, diet).
  • Human practices and perceptions research (ethnography, KAP study).
  • NiV monitoring in bat urine and anti-NiV antibodies in human serum.

Main Results:

  • NiV confirmed in fruit bats (28/3930 urine samples positive).
  • Identified human practices (fruit consumption, palm juice production) as potential transmission routes.
  • No Nipah virus antibodies detected in 418 potentially exposed individuals.

Conclusions:

  • Human practices are critical in emerging infectious disease transmission.
  • Integrating social sciences (anthropology) into health programs is vital.
  • Integrated studies can reduce risks of other bat-borne diseases.