avian influenza (highly pathogenic)

Avian Influenza (Highly Pathogenic) Fowl plague, Fowl pest, Fowl disease, Fowl or bird grippe 11/13/2009 1 EZFBD- PPT

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EZFBD- PPT 1

Avian Influenza (Highly Pathogenic)

Fowl plague, Fowl pest, Fowl disease, Fowl or bird grippe

11/13/2009

Page 2: Avian influenza (highly pathogenic)

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The Organism

11/13/2009

Page 3: Avian influenza (highly pathogenic)

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Influenza VirusFamily OrthomyxoviridaeThree main types

Type A Multiple species

Type B Humans

Type C Humans and swine

11/13/2009

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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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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

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Influenza A

11/13/2009

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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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Influenza CHumans and swineDifferent pattern of surface proteinsRare

Mild to no symptomsBy age 15, most have antibodies

11/13/2009

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