Pathological effects due to metacercariae of Clinostomum piscidium migration in snakeskin gourami (Trichopodus pectoralis) in Thailand

Frontiers in Veterinary Science

Veterinary Science

Channarong Rodkhum¹  Sk Injamamul Islam²  Piyanan Taweethavonsawat³ 

[1] Department of Veterinary Microbiology and Center of Excellence in Fish Disease, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand;The International Graduate Program of Veterinary Science and Technology (VST), Department of Veterinary Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand;The International Graduate Program of Veterinary Science and Technology (VST), Department of Veterinary Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand;Parasitology Unit and Biomarkers in Animal Parasitology Research Group, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand;

关键词: aquaculture;    digenean trematode;    ITS;    pathology;    Thailand;   

DOI  :  10.3389/fvets.2023.1177218

 received in 2023-03-01, accepted in 2023-04-17,  发布年份 2023

来源: Frontiers

【 摘 要 】

Clinostomum spp. is a fish-borne pathogen and a digenetic trematode with a global range. Despite its zoonotic relevance, the pathogenic impact of the parasite in Thai aquaculture is currently unclear. The present study deals with the pathogenic changes that fluke causes in their host, Trichopodus pectoralis, and the molecular confirmation of the Clinostomum piscidium by targeting 18 s rDNA and ITS gene. The metacercariae of C. piscidium were discovered in the body cavity of infected fish. The gross pathological examination revealed a few white migratory tracks on the surface of the liver and spleen. The migratory track showed histologically as a primary hemorrhage and necrosis of hepatic cells surrounded by a layer of macrophages and epithelioid cells, inflammatory cells, and eosinophilic granular cells in the cytoplasm of liver cells and close to the epithelial cells of the intestine. Also, the migratory track in the spleen appeared as a marked decrease of Red Blood Cell (RBC) count and changes in the necrotic tissue. Infection with this metacercaria produced hepatic tissue injury, which disrupted hepatic metabolism and decreased body weight in the fish hosts. The findings of the study suggest that the pathological effect of C. piscidium on farm T. pectoralis can cause significant economic loss by stunting fish development and predisposing fish to opportunistic pathogens in the environment. Hence, the treatment and control of C. piscidium infections are crucial for the viability of the aquaculture sector since this parasite has been found to cause pathological damage to the vital organs of fish.

【 授权许可】

Unknown   
Copyright © 2023 Islam, Rodchum and Taweethavonsawat.