Why the study?
Does exposure to floods increase the incidence of enteric infectious diseases in Qingdao, China?
Does exposure to floods increase the incidence of enteric infectious diseases in Qingdao, China?
Floods significantly increase the short-term risk of bacillary dysentery, highlighting the need for targeted public health precautionary measures following flood disasters.
Floods may raise short-term bacillary dysentery risk; leaves open causal confirmation and generalizability to other settings or pathogens.
The current study aimed to examine the relationship between floods and the three enteric infectious diseases, namely bacillary dysentery (BD), hand-foot-mouth disease (HFMD) and other infectious diarrhoea (OID) in Qingdao, China. Relative risks (RRs) and 95% confidence intervals (CIs) of floods on BD, HFMD and OID were calculated using a quasi-Poisson generalized linear model, adjusting for daily average temperature, daily average relative humidity, and seasonal and long-term temporal trends. Two separate models within two different periods were designed. Model 1 for the summer period showed that floods were positively associated with BD for 4- to 12-day lags, with the greatest effects for 7-day (RR 1·41, 95% CI 1·22-1·62) and 11-day (RR 1·42, 95% CI 1·22-1·64) lags. Similar findings were found in model 2 for the whole study period for 5- to 12-day lags. However, HFMD and OID were not significantly associated with floods in both models. Results from this study will provide insight into the health risks associated with floods and may help inform public health precautionary measures for such disasters.
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Zhang et al. (2016) studied this question.
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