Abstract

The present study was arranged to investigate the existence of different species of Nematodes which are infect the cattle through examination of 484 fecal samples which were collected randomly from Mosul city and around regions of it, during the period from October 2011 to June 2012 and determination infection severity of them.
The total percentage of infection with Nematodes was 23.34%. The significant variations in percentages of infection were recorded according to months of study. The highest percentage was in December 42.10% and the lowest in February 2.63%. In this study were diagnosed 13 genera of Nematodes, most of them Haemonchus spp. and Ostertagia spp.
In the estimation of infection severity with Nematodes, significant variations were showed among the light infection with both of moderate and severe infection and the highest percentage of light has accomplished to 67.25% and the lowest in moderate infection was 11.50%.

Key words: Waad Khalid Khalaf; Manal Himmadi Hasan