Endemic region<unk>  is found in the Lower<unk> river basin region, from Khong Island in Laos to Kratié Province, Cambodia. Schistosomiasis<unk>  has also been found in the province of Champasack in the southern regions of Laos, and has also been found in eastern Thailand. In fact,<unk>  has shown that it has the smallest distribution of any schistosome species. Transmission of<unk>  occurs in the low water season in this geographical area. Approximately 140,000 people are at risk for<unk>  infection. This is quite a small number, but infection and re-infection sustain the disease in these populations. These affect children the most because of their high level of water contact. Reservoir hosts also play a big role in keeping the disease around, although the number of reservoir hosts for the<unk> species is less than that of other species. With the use of stool examinations, only about 1500 people are shown to be infected, but it is projected that more than 10 times this number is more accurate. In 1989, a universal mass treatment with praziquantel of the people of Khong Island was performed. In 1995, a similar treatment was performed in Cambodia. In some areas, this treatment was highly effective, eliminating<unk> . In other regions, particularly Khong Island, there was little effect. Attempting to control the intermediate host with a molluscicides also had no long-term effect.
Schistosoma mekongi
Schistosoma malayensis
Schistosoma intercalatum
Schistosoma indicum
Echinostoma revolutum
Trypanosoma evansi
Toxocara malayasiensis
Echinostoma cinetorchis