First ultrastructural observations on gastritis caused by Physaloptera clausa (Spirurida: Physalopteridae) in hedgehogs (Erinaceus europeaus).

Abstract:

:Ultrastructural changes of gastritis due to infection with Physaloptera clausa in 12 fresh carcasses of euthanized European hedgehogs (Erinaceus europaeus) collected from different part of Urmia, Iran, in which they were highly populated with this animal, six females and six males were subjected to detail necropsy with special reference to the stomach. Macroscopic changes of stomach were recorded and some of the worms collected. Based on number of parasites present in the stomach, they were divided into light infection, mild infection, and severe infection. Parasites were collected, and worms identification of the species was confirmed on the basis of light microscope examination with reference to keys. Tissues fixed in 3% glutaraldehyde, post-fixed in 1% osmium tetroxide and processed and plastic embedded; ultrathin sections of 60-70 nm were cut and stained with uranyl acetate and lead citrate; electron microscopic observations showed that, in light infection some changes were observed in gastric cells such as dilatation and vesiculation of the endoplasmic reticulum, large numbers of lipid granules, mitochondrial swelling, nuclear chromatin margination, and some nucleus showed washed out appearance. Other cells showed some alterations in mitochondria, dilatation of smooth endoplasmic reticulum, loss of both free and bound ribosomes, vesiculation in cytoplasm, and increase Golgi apparatus and secretory vesicles. The inflammatory cells including lymphocytes, macrophages, mast cells, and predominantly eosinophils were identified. In moderate infection, the cellular pattern of gastric mucosa replaced with inflammatory cells. The marked increase of macrophages and other inflammatory cell was observed. A particular finding in our study was the presence of globule leukocyte in the moderate stage. Moreover, scant formation and distribution of collagen fibers as well as fibroblasts were also noted. In severe infection, the most obvious observation was marked distribution of collagen fibers around the mucosal cells. The fibroblastic cells with elongated nucleus and extensive indentation were noticed. In conclusion, the result of our study revealed P. clausa could be a cause of gastritis and according to cellular pattern of inflammatory reaction, with the increase of worm burden and development of infection, chronic gastritis was stabilized. Present investigation documented the ultrastructural changes during verminous gastritis in hedgehogs.

journal_name

Parasitol Res

journal_title

Parasitology research

authors

Gorgani-Firouzjaee T,Farshid AA,Naem S

doi

10.1007/s00436-015-4597-6

subject

Has Abstract

pub_date

2015-10-01 00:00:00

pages

3693-8

issue

10

eissn

0932-0113

issn

1432-1955

journal_volume

114

pub_type

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