Study on Enterocytozoon hepatopenaei (EHP) Diseases in White-leg Shrimpsin Quang Ninh and Nam Dinh Provinces

Received: 12-06-2023

Accepted: 20-11-2023

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Issue: Vol. 21 No. 11 (2023)

Section:

CHĂN NUÔI – THÚ Y – THỦY SẢN

How to Cite:

Hoai, T., Hoa, D., Binh, X., Thuong, M., Hong, N., Linh, H., … Viet, T. (2024). Study on Enterocytozoon hepatopenaei (EHP) Diseases in White-leg Shrimpsin Quang Ninh and Nam Dinh Provinces. Vietnam Journal of Agricultural Sciences, 21(11), 1446–1454. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/1213

Study on Enterocytozoon hepatopenaei (EHP) Diseases in White-leg Shrimpsin Quang Ninh and Nam Dinh Provinces

Truong Dinh Hoai (*) 1, 2, 3 , Dang Thi Hoa 3 , Xa Duc Binh 3 , Mai Van Thuong 3 , Nguyen Thi Thuy Hong 3 , Hoang Thi Thuy Linh 3 , Tran Thi Diem Quynh 3 , Tran Thi Trinh 3 , Doan Thi Nhinh 3 , Le Viet Dung 3 , Kim Van Van 3 , Truong Hong Viet 4

  • 1 Khoa Chăn nuôi và NTTS
  • 2 Faculty of Animal Science and Aquaculture, Vietnam National University of Agriculture
  • 3 Khoa Thủy sản, Học viện Nông nghiệp Việt Nam
  • 4 Viện Nghiên cứu Nuôi trồng Thủy sản II

    • Keywords

    Entercytozoo hepatopenaei, whiteleg shrimp, prevalence, pathology, Northern Viet Nam

    Abstract


    This study aimed to determine the disease situation and disease characteristics caused by microsporidian Enterocytozoon hepatopenaei(EHP) in white-leg shrimps in farming areas in Northern Vietnam. Shrimp samples from 85 shrimp farms in Nam Dinh and Quang Ninh provinces were collected to conduct research. The detection results using the PCR assays determined that shrimp samples from 33 farms (38.8%) were positive for EHP. The analysis of diseased shrimps (n = 215) showed that the infected shrimps with EHP exhibited growth retardation (81.8%), muscle opacity, body shelling, and the appearance of larger "rice grains" in the caudal vertebra (85.1%). Diseased shrimps also showed signs of twisted intestines and intermittent food. Giemsa staining results from infected shrimp samples showed that EHP microspores were concentrated in the hepatopancreas organs the opaque muscle and “rice grains” of affected shrimps. Infected shrimps appeared mainly in the culture period from 30 to 60 days after stocking, accounting for 78.7%. The results of this study provide helpful information for the diagnosis and effective prevention measures for EHP in shrimps.

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