Tritrichomonas foetus is a parasite of particular veterinary importance cau
sing bovine tritrichomonosis, a sexually transmitted disease leading to inf
ertility and abortion. The present review summarizes the current knowledge
on potential mechanisms of pathogenicity of T. foetus, the immunology of ho
st-parasite interaction in bovine tritrichomonosis, and the experimental mo
del systems of this parasitic disease. (C) Elsevier, Paris.