Mmanụ dị mkpa sitere n'okike bụ ọgwụ ụmụ ahụhụ sitere n'okike nke nwere ike ịchịkwa pests na ihe ọkụkụ n'ụzọ dị irè, si otú a na-echebe ihe ọkụkụ n'aka ụmụ ahụhụ.

Mmanụ dị mkpa sitere n'okike nwere ike igbochi uto na mmeputakwa nke pesti, si otú a belata mmebi nke pesti na ihe ọkụkụ.

Na mgbakwunye, mmanụ dị mkpa sitere n'okike nwekwara ike igbochi agụụ ụmụ ahụhụ, si otú ahụ belata mmebi nke pesti na-emebi ihe ọkụkụ.

Na mgbakwunye, mmanụ dị mkpa sitere n'okike nwekwara ike igbochi ọrụ nke pests, si otú ahụ belata mmebi nke pests na ihe ọkụkụ.

N'ikpeazụ, mmanụ dị mkpa sitere n'okike bụ ọgwụ na-egbu egbu na-arụ ọrụ ugbo, nke nwere ike ịchịkwa pests na ihe ọkụkụ nke ọma, si otú a na-echebe ihe ọkụkụ site na pests.