A Pathological Lesions Study of Bovine Abomasums in Urmia Abattoir

The objective of this study was to evaluate pathologic lesions on abomasums which were collected from 492 cattle in Urmia abattoir, located in North West of Iran, during different seasons from February 2010 to July 2011. Furthermore, this research was carried out in a 6-month period through 46 times randomly visiting the abattoir. Additionally, abomasums separated from other parts of the gastrointestinal tract, and macroscopic examination was started. Subsequently an incision made over greater curvature in order to examining the mucosa; moreover for microscopic observation some specimens were taken from abomasums and referred to pathological examination. The results of this study demonstrated that 77 specimens encompassed ulcer and erosions, trichobezoar and indigestible masses (10.97%), 48 samples had hyperemia (9.7%), 26 samples showed abomasal parasites (5.28%), 14 samples were with abomasal distention (2.84% ), 5 samples had soil and sand (1.01%) and one developed a tumor (0.2%). Statistical analysis indicated that there is not significant correlation between onset of ulcers and seasons so that its occurrence in winter, spring and summer was 16.9%, 13.6% and 17.9% respectively. Although there was a slight decrease, parasitic infestation increased concurrently with environmental heat which was recorded as 4.3% in winter, 5.02% in spring and 6.8% in summer.