Progress in researches on effects of heavy rainfall and flood on bacillary dysentery incidence

Under the background of climate change, frequent heavy rainfall and floods have a great influence on the developing countries in the monsoon region in Southeast Asia, which may change the incidence pattern or regional difference of bacillary dysentery. In the review, we summarize the progress in researches on associations of rainstorm and flood on bacillary dysentery, mechanism and path of the influence, related environmental-social factors, and main models in the studies. Many studies have shown that rainstorm and flooding significantly increase the risk of bacillary dysentery; a number of studies also have dealt with relevant environmental-social factors such as infrastructure overload, geographic landscape pattern, economic development, urban and rural difference, and medical staff allocation. The results of the studies indicated that the heavy rainfall and floods-induced risk of bacillary dysentery incidence varied among populations of different gender, age, occupation, and living regions. The analytical models adopted by the studies include generalized additive model, distributed lag nonlinear model, and Poisson regression model. Further studies are warrented to explore the mechanism path of the influece of heavy rainfall and floods on bacillary dysentery incidence.