System disorders a. Hematological disorders aplastic anemia leukemia allergic purpura hemophilia TP(idiopathy thrombocytopenic purpura b Infection infective endocarditis septicemia epidemic hemorrhagic fever(hantaan virus) scarlet fever(B-hemolytic streptococcus) leptospirosis (leptospire) filariasis (Wuchereria bancrofti, Brugia malayi✓ System disorders a. Hematological disorders aplastic anemia leukemia allergic purpura hemophilia ITP (idiopathy thrombocytopenic purpura) b. Infection infective endocarditis septicemia epidemic hemorrhagic fever (Hantaan virus) scarlet fever (-hemolytic streptococcus) leptospirosis (leptospire) filariasis (Wuchereria bancrofti, Brugia malayi)