Download - Avian influenza (highly pathogenic)
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EZFBD- PPT 1
Avian Influenza (Highly Pathogenic)
Fowl plague, Fowl pest, Fowl disease, Fowl or bird grippe
11/13/2009
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EZFBD- PPT 2
The Organism
11/13/2009
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EZFBD- PPT 3
Influenza VirusFamily OrthomyxoviridaeThree main types
Type A Multiple species
Type B Humans
Type C Humans and swine
11/13/2009
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EZFBD- PPT 4
Influenza AMultiple species
HumansAvian Influenza
Most virulent groupClassification by surface antigens
into subtypesHemagglutinin (H or HA)Neuraminidase (N or NA)
11/13/2009
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EZFBD- PPT 5
Surface Antigens and Subtypes
16 HA and 9 NA for influenza AAll in aquatic birds
Hemagglutinin (HA)Function: Sites for attachment to infect host
cellsNeuraminidase (NA)
Function: Remove neuraminic acid from mucin and release from cell
11/13/2009
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EZFBD- PPT 6
Influenza A
11/13/2009
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EZFBD- PPT 7
Influenza BMostly humansCommonLess severe than AEpidemics occur less often than AHuman seasonal vaccine
Two strains of type AOne strain of type B
11/13/2009
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EZFBD- PPT 8
Influenza CHumans and swineDifferent pattern of surface proteinsRare
Mild to no symptomsBy age 15, most have antibodies
11/13/2009