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OJVRTM

Online Journal of Veterinary Research©

 

Volume 18(8): 662-667, 2014.


Bovine sarcocystosis: prevalence rates and cyst wall characteristics

 

Shahrzad Azizi, Saeed Reza Nourollahi Fard, Reza Kheirandish, Laya Ebrahimi, Meysam Shamsi

 

Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran

 

ABSTRACT

 

Azizi S, Nourollahi Fard SR, Kheirandish R, Ebrahimi L, Shamsi M., Bovine sarcocystosis: prevalence rates and cyst wall characteristics, Onl J Vet Res., 18(8): 662-667, 2014. Sarcocystis spp are obligatory two-host parasites. In livestock, sarcocystosis lead to reduced weight-gain, abortion and/or acute fatal illness. Skeletal muscle is the aim tissue in intermediate hosts. Prevalence of Sarcocystis spp. in slaughtered cattle from a Kerman abattoir in Iran is reported. Esophagus and diaphragmatic muscles were collected from 102 cattle and examined grossly and by microscopy for sarcocysts. Macroscopic sarcocysts were not found in any muscle sample. In contrast, under light microscopy, 99 of 102 samples revealed thin-walled cysts due to S. cruzi and 25 presented thick-walled cysts. The most infected tissues were the esophagus and lesser diaphragmatic muscles. Degenerate parasitic cysts enclosed variable numbers of inflammatory cells including eosinophils, lymphocytes, macrophages and plasma cells. In a few cases, granulomatous reaction occurred around the cysts. These results report a very high incidence of Sarcocystis in cattle.

 

Key words: Sarcocystis, thin-walled, thick-walled cyst, cattle, macroscopic, microscopic findings.


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