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Aquaculture International

, Volume 27, Issue 2, pp 609–620 | Cite as

Prevalence of microsporidian parasite, Enterocytozoon hepatopenaei in cultured Pacific White shrimp, Litopenaeus vannamei (Boone, 1931) in West Bengal, East Coast of India

  • B. K. BeheraEmail author
  • A. Das
  • P. Paria
  • A. K. Sahoo
  • P. K. Parida
  • T. Abdulla
  • B. K. Das
Article
  • 51 Downloads

Abstract

Enterocytozoon hepatopenaei (EHP) is an emerging microsporidian pathogen in shrimp aquaculture. In the present study, prevalence rate of EHP in cultured Litopenaeus vennamei from West Bengal, east coast of India, was investigated. Histology of hepatopancreas of the infected animals showed eosinophilic to basophilic inclusions in the epithelial cells with moderate necrotic tubular detachment from the basal membrane. Extracted DNA from the hepatopancreatic tissues were subjected to PCR by using two different sets of primers targeting the ssu rRNA genes. An expected PCR product of 951 and 510 bp were yielded for the EHP-positive shrimp samples. Based on the BLASTP, the sequence of ssu rRNA gene (KU179095) of the collected samples showed 100% homology with EHP ssu rRNA gene sequences submitted in NCBI from different countries viz. Vietnam, Thailand, China and India. Further, all the field samples were found to be EHP+ by using a new second-generation primer targeting the spore wall protein gene (SWP) of EHP. For detection of EHP, 119 samples from East Midnapur district, 50 samples from North 24 Parganas district and 50 Samples from South 24 Parganas district were being screened. Overall prevalence rate of EHP in the cultured L. vennamei farm in West Bengal was estimated to be 84.9%, which was highest in comparison to earlier reports in India. Our finding showed that EHP could be detected from slow growing shrimps as well as in some cases from White Faeces Syndrome-affected animals. This is the first report on the occurrence of Enterocytozoon hepatopenaei in cultured L. vannamei in West Bengal, east coast of India.

Keywords

Enterocytozoon hepatopenaei Spore Wall Protein gene Histology White Faeces syndrome Litopenaeus vennamei 

Notes

Acknowledgments

The authors are thankful to Dr. Joykrushna Jena, Deputy Director General (Fishery Science), Indian Council of Agricultural Research, New Delhi, for his support and guidance. The authors would like to express their sincere thanks to Mr. Asim Kumar Jana and Mr. Hirak Jyoti Chakraborty for helping in sampling, laboratory assistance and data analysis.

Funding information

This work was funded by the National Fisheries Development Board (NFDB) (G/Nat. Surveillance/2013 dated 16.08.2013), Hyderabad under “National Surveillance Program for Aquatic Animal Diseases (NSPAAD)” Project.

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interest.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • B. K. Behera
    • 1
    Email author
  • A. Das
    • 1
  • P. Paria
    • 1
  • A. K. Sahoo
    • 1
  • P. K. Parida
    • 1
  • T. Abdulla
    • 1
  • B. K. Das
    • 1
  1. 1.Biotechnology LaboratoryICAR-Central Inland Fisheries Research InstituteKolkataIndia

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