The protozoan Trichomonas foetus has been recognized as an important cause of chronic reproductive failure in cattle in many countries, including Iraq. The objective of the present study was to determine the prevalence of T. foetus in Baghdad (Abu-Graib) by using new diagnostic culture system In-Pouch TF, Giemsa stain and study the stages of growth (morphological changes). The study based on collection and diagnosis 70 samples of preputial and vaginal washes from cattle. The study starts at October 2015 and extend to May 2016. The result showed that the total percentage of infection in cattle of Baghdad was (54.28%, 21.42 %) respectively. Through the stages of growth, the parasite manifested different morphological changes, which were ranged from a nonmotile spherical shape (pseudocyst), nucleated and flagellated pear shape, bi-nucleated and flagellated spherical shape and finally slow-moving large spherical shape.
