Segment of Yangtze River | Water level rising | Water level decreasing | Oncomelania snails | S. japonicum | Refs. | ||
---|---|---|---|---|---|---|---|
Height (m) | Months | Height (m) | Months | ||||
Hubei (Jianghan Plain) | 0.06–1.5 | Jan – May | 1.8–2.4 | Nov, Dec | New habitats for Oncomelania snails would appear. | The probability of humans and livestock becoming infected would increase. | |
Hunan (Dongting Lake) | 0.06–1.5 | Jan – May | 1.6–2.6 | Nov, Dec | The distribution of snails would not be significantly affected, however, the reproduction of snails would be effectively curbed. | The probability of humans and livestock becoming infected would increase and schistosomiasis epidemics would worsen. | |
Jiangxi (Poyang Lake) | 0.11–0.90 | Jan – Mar | 0.07–0.13 | Dec | The reproduction and distribution of snails would be unaffected or the density of snails would increase, or the density of snails would decrease in the autumn. | The epidemiology of schistosomiasis would be very limitedly affected. | |
Anhui | 0.14–0.76 | Jan – Apr | 0.06–1.26 | Oct – Dec | The distribution of snails would not be significantly affected, however, some new habitats for snails would appear. | The probability of humans and livestock becoming infected would increase. | |
Jiangsu | 0.15–0.40 | Feb – Apr | 0.32–0.75 | Oct, Nov | The distribution of snails would be not affected and the density of snails would decrease. | The incidences of schistosome infections in people and livestock would increase. |