Abstract:Objective To investigate the changes in the incidence trend of notifiable infectious disease at Yichang surveillance sites in the Three Gorges Reservoir Area during 2004-2017. Methods We collected the data about the incidence of notifiable infectious diseases and demography at Yichang surveillance sites during 2004-2017. Joinpoint regression analysis was employed to estimate the time trends of various infectious diseases. Results A total of 7,409 cases of infectious diseases at Yichang surveillance sites during 2004-2017 were cumulatively reported after the impoundment of the Three Gorges Reservoir Area, and the annual average incidence rate was 564.48/100,000. The reported incidence rates of notifiable infectious diseases from 2004 to 2009 showed an increasing trend (APC=15.00%, P=0.009), but the rates stayed stable after the year of 2009 (P=0.532). The incidence was significantly higher in the males than in the females (χ2=326.52, P<0.001). The infectious diseases prevalent in the Three Gorges Reservoir Area mainly included hepatitis B, tuberculosis, hand, foot and mouth disease (HFMD), other infectious diarrhea and epidemic parotitis, accounting for 89.70% of the total cases. Analysis of different types of the diseases indicated that the incidence rates of hepatitis B from 2004 to 2010 presented a rapid upward trend (APC=30.75%, P=0.006), but the rates of pulmonary tuberculosis from 2007 to 2017 showed a slowly downward trend (APC=-6.53%,P=0.011). Conclusions There was no specific change in the reported incidence rates of notifiable infectious diseases at Yichang surveillance sites in the Three Gorges Reservoir Area during 2004-2017, which was basically consistent with the epidemic situation of infectious diseases in China. We should formulate relevant prevention and control strategies based on the priority infectious diseases such as hepatitis B, pulmonary tuberculosis and HFMD in the Three Gorges Reservoir Area.
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