Less than 0.1% cows will become carriers. <ref>Skirrow, S.(1987) '''Identification of trichomonad-carrier cows'''.J Am Vet Med Assoc, 191(5):553-554;6</ref> | Less than 0.1% cows will become carriers. <ref>Skirrow, S.(1987) '''Identification of trichomonad-carrier cows'''.J Am Vet Med Assoc, 191(5):553-554;6</ref> |