Infection is usually transient, lasting 8-18 weeks <ref><Skirrow, S.Z., BonDurant, R.H. (1990)'''Induced Tritrichomonas foetus infection in beef heifers.''' J Am Vet Med Assoc, 196(6):885-889; 25<\ref> | Infection is usually transient, lasting 8-18 weeks <ref><Skirrow, S.Z., BonDurant, R.H. (1990)'''Induced Tritrichomonas foetus infection in beef heifers.''' J Am Vet Med Assoc, 196(6):885-889; 25<\ref> |