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Schistosomiasis in Cambodia: a review
Summary
Human schistosomiasis in Cambodia was first identified in 1968, primarily affecting fishermen in Kratié. Transmission occurred in floating villages on the Mekong River, with children showing higher infection rates.
Area of Science:
- Tropical medicine
- Parasitology
- Epidemiology
Background:
- Human schistosomiasis (bilharzia) was first documented in Cambodia in 1968.
- Initial cases were concentrated in Kratié, a provincial capital on the Mekong River.
- Infection was primarily observed among ethnic Vietnamese fishermen residing in floating villages.
Purpose of the Study:
- To investigate the initial epidemiology and transmission patterns of human schistosomiasis in Cambodia.
- To identify the primary focus and at-risk populations for schistosomiasis in the Kratié region.
- To compare findings with schistosomiasis cases reported in nearby Laos.
Main Methods:
- Epidemiological surveys and case detection in Kratié between 1968 and 1970.
- Prevalence assessments across different age groups within the fishing community.
- Environmental observations to understand potential transmission sites.
Main Results:
- Overall schistosomiasis prevalence in fishermen ranged from 7% to 10%.
- Prevalence in children (1-14 years) of fishermen was significantly higher, between 14% and 22%.
- Transmission was localized to still water areas between permanent floating houses and the shore.
Conclusions:
- Kratié emerged as the principal focus of human schistosomiasis in Cambodia.
- Transmission dynamics were closely linked to the unique living conditions in Mekong River floating villages.
- The causative parasite is likely the same species found in Laos, though the specific snail vector differs.