Abstract

Abstract
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.

Keywords: Bovine; Pathological Lesions; Urmia abattoir; Ruminants