LPAI In Poultry

Low pathogenic Avian Influenza(LPAI) in Poultry

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Low pathogenic Avian Influenza(LPAI)

Its most common disease in poultry specially in winter season.
Low Patthogenic Avian Influenza (LPAI) just only one of many subtypes in poultry. Avian influenza refers to the disease caused by infection with avian (birdinfluenza (flu) Type A viruses in poultry. its also known Bird Flu.

Classification

There are four types of influenza virus A,B,C,D. All types are found in wild aquatic birds like gease, swans, tern etc

Subtypes of influenza A virus

It’s divided on the basis of two surface proteins haemagglutinin (HA) & neuraminidase ( NA)
There are known 18 HA & 11 NA subtypes are available.
There many combination both HA & NA protein possible like H5 N7 virus has H 5 protein & NA 7 protein.
Exception

All subtypes not circulating except the poultry like
In bats- H17N10 & H18N11
In Human- H1N1, H3N2
In horse-H7N7, H3N8
In horse &dogs-H3N8

So influenza virus designated by two forms on the basis of severity-
Highly pathogenic Avian Influenza H5 (HPAI)
Low pathogenic Avian Influenza virus H9 (LPAI)

Low pathogenic avian influenza

There nine subtypes of LPAI
H9N1
H9N2
H9N3
H9N4
H9N5
H9N6
H9N7
H9N8
H9N9
All are identified in will birds & in poultry it’s known as LPAI

TYPES OF INFECTION

H9 Virus causes always mixed infection associated with others microganisms like e.coli, mycoplasma, salmonella, streptococcus, staphylococcus, pasteurella etc

Collected from: Information on Avian Influenza | Avian Influenza (Flu) – CDC

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