1. FISH VIRAL DISEASES
VIRUS MUST HAVE HOST TO SURVIVE AND REPLICATE

2. VIRION
SOME HAVE ADDITIONAL LIPID GLYCOPROTEIN COAT

3. Size of particles

4. VIRUS TYPES DNA HERPESVIRUS, IRIDOVIRUSES RNA
RABDOVORUSES, RETROVORUSES

5. Effects of Virus Infection
Histological changes
CPE -

6. Host Response/Outcome
No clinical disease
Clinical disease

7. MANAGEMENT OPTIONS FOR VIRUSES
AVOID
VACCINATE
REDUCE RISKS

8. DNA viruses -Herpes group
Channel catfish virus (CCV)
Oncorhynchus masou virus (OMV)
Walleye herpesvirus (WHV)

9. DNA - Iridovirus Lymphocystis Disease - LDV Atlantic Cod Iridovirus
Viral Erythrocytic Necrosis -VEN
White Sturgeon Iridovirus
Viral Erythrocyte Inclusion Body Syndrome - EIBS

10. Channel catfish virus
Acute disease
Clinical signs
Diagnosis

11. Erythrocytic Inclusions
VEN
No Red Blood Cells
Diagnosis

12. EIBS
First detected spring Chinook salmon LWS hatchery Hematocrits %

13. RNA viruses Rhabdoviruses
IHNV
Infectious hematopoietic necrosis virus
VHSV
Viral Hemorrhage septicemia virus

14. IHNV Originated as three strains in Western North American salmonids
Signs
Diagnosis

15. Strains and Virulence
Single stranded RNA genome that encodes five structural proteins.
Other factors affecting Virulence

16. Attenuated Virus
Nan Scott Lake and Hagerman strains (multiple passages)
Vaccines

17. IHNV Control Methods

18. VHSV- Viral Haemorrhagic Septicemia Virus
Described in RBT in Denmark 1949

19. VHSV
Signs
Diagnosis

20. Marine Reservoir for Pacific Northwest Isolates
Herring Stocks affected severely

21. Birnaviridae - IPNV
Infectious Pancreatic Necrosis

22. IPN
Signs
Diagnosis

23. IPNV
Inactivated by chlorine and iodine

24. DI - DEFECTIVE INTERFERING PARTICLES
GENOME DEFFECTIVE