Pathogenicity of VHS, IHN and IPN viruses for pathogen free rainbow trout (Oncorhynchus mykiss) fry

  • Matras M
  • Antychowicz J
  • Reichert M
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Abstract

Pathogen free rainbow trout fry, produced in virus free laboratory environment, were experimentally infected via water with Polish isolates of VHSV and IPN, and IHNV strain received from the Central Reference Laboratory, Arhus. During the experiments, mortality, clinical symptoms, and pathological lesions were recorded. The data achieved demonstrated that the symptoms, pathological lesions, and the course of VHS, IHN, and IPN differed in some aspects from generally accepted opinions on characteristics of the diseases. Our findings could be applied for the preliminary diagnosis of these diseases in rainbow trout fry. On the basis of cumulative mortality rates it should be concluded that the infedtion with some Polish IPNV isolates could be fatal to rainbow trout fry and for that reason the disease should be subjected to an eradication programme similarly to VHS and IHN.

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Authors

  • Marek Matras

  • Jerzy Antychowicz

  • Michal Reichert

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