trudng thanh deu d ngoai co the ky chu, chung xam nhap vao ky chu cot de lay thuc an.sau khi an no, chung rdi bo ky chu
va lai chi tim den ky chu khi doi (vf du: dia, mu6i....).Vat ky sinh tam thdi thudng ky sinh tren cac bo phan ben ngoai cua ky chu. hay 6cac xoang cua co the (xoang mui. mie[r]