Journal of Clinical Cases

Histopathological Study Of The Fibrotic Layer Of Hydatid Cyst In Camel, Cow And Sheep

Roshan ME

Department
Department of General Veterinary Medicine, College of Veterinary Medicine, Islamic Azad University, Iran

Corresponding Author:Roshan ME

ABSTRACT

Hydatidosis or echinococcosis is one of the most important common diseases between humans and animals.
1.1. Aim: Hydatid cyst is often caused by Echinococcus granulosus worm. The closest host tissue to the cyst is the fibrous layer. The purpose of this study is to investigate any differences in the fibrosis layer in the lung and liver of ruminants.
1.2. Methods: For each of these three animals, 22 infected lung or liver samples were collected from Tehran slaughterhouses during the months of May to July 2022. A piece of one square centimeter was removed from the fibrotic layer and also from the healthy tissue near the cyst. In the usual process of section preparation, pathological observation was included. Sections were observed and reported by a pathologist.
1.3. Findings: In total, 138 sections were studied pathologically. The diameter of the cysts varied between 1.5-0.6 cm in camels and cattle and 0.5-0.2 cm in sheep. Most cases of sterile cysts were seen in cows. Fibrous layer was present in all (100%) of the 66 studied samples. Necrosis was observed in 20 cases (30.30%), including 12 cases in the lungs of camels, 6 cases in the lungs of cows, and only 2 cases, one in the lung and the other in the liver of sheep. Only one case (1.52%) of granuloma was observed in cow liver.
1.4. Conclusion: Differences were observed in the fibrotic layer of hydatid cyst in cows, camels and sheep. In all 3 types of animals, the rate of progression of the lesion was towards the formation of necrosis and granuloma, and also, the frequency of these lesions had a significant difference, which is due to the difference in the parasite strain, the host type, and also the average age of these animals