【名词&注释】
病原菌(pathogen)、疟原虫(plasmodium)、血清学鉴定(serological identification)、清热解毒(heat-clearing and detoxifying)、安宫牛黄丸(an gong niu huang wan)、多发病(frequently occurring illnesses)
[多选题]三日疟的临床特征有
A. 多发病(frequently occurring illnesses)于晚秋及初冬
B. 3日发作一次,周期相对固定
C. 起病当日血中即可查出疟原虫
D. 脾大突出
E. 起病多缓慢