Low pathogenic Avian Influenza(LPAI)
It’s the most common disease in poultry, especially in the winter season. Low Pathogenic Avian Influenza (LPAI) just only one of many subtypes in poultry. Avian influenza refers to the disease caused by infection with avian (bird) influenza (flu) Type A viruses in poultry. It’s also known as Bird Flu.
Classification
There are four types of influenza viruses A, B, C, D. All types are found in wild aquatic birds like geese, 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. Their many combinations of both HA & NA protein possible like the 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 other microorganisms like e.coli, mycoplasma, salmonella, streptococcus, staphylococcus, Pasteurella, etc
Collected from: Information on Avian Influenza | Avian Influenza (Flu) – CDC
Related Post
Clinical Signs Of Low Pathogenicnic Avian Influenza (LPAI) In Poultry
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