芦山县1950年～1979年间疟疾的下降趋势具有非常显著意义(P<0.01),年平均下降率为98.98%。疟疾发病的季节特征是,3～5月为流行前期,6～10月为流行期,11月至次年2月为流行后期。新发病高峰月在8～9月。经相关回归分析,气温、降雨量和蚊密度三个因素均与发病水平呈正相关关系(r_1=0.74,r_2=0.69,r_3=0.58)。建立了同归方程。 The downward trend of malaria in Lushan County from 1950 to 1979 was very significant (P <0.01), with an average annual decline rate of 98.98%. The seasonal characteristics of malaria incidence, 3 to 5 months for the pre-epidemic, 6 to October for the epidemic, November to February next year for the popular late. The peak incidence of new months in August to September. Correlation analysis showed that the three factors of temperature, rainfall and mosquito density were positively correlated with the disease incidence (r_1 = 0.74, r_2 = 0.69, r_3 = 0.58). Established the same return equation.