Lymnaea, Indoplanorbis, Bulinus, Physa, Gyraulus, Bellamaya and Oncomelania
2010) found that as winter temperatures continue to rise due to global warming, Oncomelania hupensis (the intermediate host of Schistosoma japonicum in China) may increase its range, thereby spreading schistosomiasis to the northern part of China.
Effects of low temperature on the schistosome-transmitting snail Oncomelania hupensis and the implications of global climate change.
Schistosomes causing human disease Schistosoma Intermediate species Geographical area snail host Haematobium Africa, Madagascar, Bulinus Zanzibar, Pemba, Middle East Intercalatum Central and West Africa Bulinus Mansoni Africa, Madagascar, Biomphalaria Gulf of Arabia, Brazil, Venezuela, Suriname, Caribbean Islands Japonicum China, Philippines Oncomelania
mainland, Indonesia Mekongi Laos, Cambodia Tricula Egg Egg production characteristics (number/day) Terminal spine 20-200 Terminal spine Unknown Lateral spine 100-300 No spine 500-3 500 No spine Unknown Schistosoma species Location of adult worms Haematobium Terminal venules of the genitourinary system and pelvic plexus Intercalatum Pericolonic plexus Mansoni Pericolonic plexus Japonicum Pericolonic plexus Mekongi Pericolonic plexus
2] was infested by the intermediate host snail, Oncomelania
Schistosomiasis japonica is a zoonotic parasitic disease caused by the trematode blood fluke Schistosomajaponicum, whose life cycle includes an amphibious freshwater snail, Oncomelania hupensis hupensis.
japonicum, and the total area of Oncomelania intermediate snail host habitats in the lake region was 3,795 [km.
Preventing floods would automatically prevent Oncomelania snails from spreading throughout the lake region through breaking embankments.
1997) have written on the impact of the dam, speculating that the effect will generally be to increase both Oncomelania snail habitat and human disease transmission.
However, the degree-day models for both infected and uninfected Oncomelania snails depend on temperature not of the water but of the microenvironment along the ditches above the waterline.