1. Internal versus external determinants of Schistosoma japonicum transmission in irrigated agricultural villages by Robert C. Spear Interface Volume 9(67):272-282 February 7, 2012 ©2012 by The Royal Society

2. Plots of equation (2.8) for two values of Λ and for values of k = 0.45 and γw = 0.001 and 0.002. Robert C. Spear J. R. Soc. Interface 2012;9:272-282 ©2012 by The Royal Society

3. The range of and values satisfying the equilibrium equations of the averaged model at the 50th percentile Λ for six non-isolated villages with infected snails. Robert C. Spear J. R. Soc. Interface 2012;9:272-282 ©2012 by The Royal Society

4. (a,b) Year 2000 equilibrium levels and 2002 re-infection levels of worm burden and infected snail density predicted by the averaged model using the 50th percentile Λ and mid-range and levels from table 3 versus those simulated by the time-variable model. Robert C. Spear J. R. Soc. Interface 2012;9:272-282 ©2012 by The Royal Society