Duck virus enteritis (duck plague) outbreak in an Australian black swan (Cygnus atratus) flock at safari park in Bangladesh: A case report

Authors

  • Md Mohirul Islam Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
  • Jahidul Islam Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
  • Md Sadequl Islam Department of Anatomy and Histology, Faculty of Veterinary and Animal Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.
  • Tanvir Ahamed Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
  • Mohammad Rafiqul Islam Livestock Division, Bangladesh Agricultural Research Council, Dhaka, Bangladesh.
  • Mst Minara Khatun Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
  • Md Ariful Islam Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

Keywords:

Australian black swan; Bangladesh; duck viral enteritis virus; phylogenetic analysis; safari park

Abstract

Objective: Duck virus enteritis is a severe viral disease that kills ducks and swans worldwide. The clinical manifestations, gross pathology, molecular detection, and characterization of the duck virus enteritis virus (DVEV) in Australian black swans at a safari park in Bangladesh were described in this case report. Materials and Methods: On a safari park in Bangladesh, an Australian black swan flock exhibited clinical signs of anorexia, greenish watery diarrhea, increased thirst, partial paralysis, and death. Postmortem examinations of deceased swans revealed extensive pathological abnormalities in the trachea, liver, and spleen. To isolate DVEV, a viral inoculum produced from the liver and spleen of dead swans was implanted into 9–13-day-old embryonated duck eggs via the chorioallantoic membrane (CAM) route. DVEV was confirmed using a polymerase chain reaction (PCR) assay. Phylogenetic analysis was used to determine the genetic relationship between the DVEV isolates from Australian black swans, and 16 DVEV isolates previously described in the GenBank. Results: Hemorrhage was noted in the annular ring of the trachea, as well as an enlarged and hemorrhagic liver and spleen. The PCR assay amplified a 446-bp fragment of the DVEV DNA polymerase gene in the liver, spleen, and CAM homogenates. The phylogenetic analysis found that the DVEV isolates from swans were comparable to those from Bangladesh, India, Vietnam, China, Germany, the USA, and Egypt. Conclusion: According to the findings of this study, the DVEV was the cause of illness and mortality in an Australian black swan flock.

J. Adv. Vet. Anim. Res., 8(4): 557-562, December 2021

http://doi.org/10.5455/javar.2021.h545

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Published

2021-10-21

How to Cite

Islam, M. M., Islam, J., Islam, M. S., Ahamed, T., Islam, M. R., Khatun, M. M., & Islam, M. A. (2021). Duck virus enteritis (duck plague) outbreak in an Australian black swan (Cygnus atratus) flock at safari park in Bangladesh: A case report. Journal of Advanced Veterinary and Animal Research, 8(4), 557–562. Retrieved from https://banglajol.info/index.php/JAVAR/article/view/79819

Issue

Vol. 8 No. 4 (2021)

Section

Case Reports

License

Copyright (c) 2021 Md Mohirul Islam, Jahidul Islam, Md Sadequl Islam, Tanvir Ahamed, Mohammad Rafiqul Islam, Mst Minara Khatun, Md Ariful Islam

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