According to Diseases of poultry books, Avian influenza” is a broad term used to explain any infection or disease in birds caused by Type A influenza viruses. the term Influenza is used in a similar form for both humans and animals.
Influenza viruses are classified to genus (“type”) based on the serologic reactions of the internal proteins. principally nucleoprotein NP and virus matrix M1 proteins. This is typically done by an immunoprecipitation test (agar gel immunodiffusion test [AGID]).
Types On Antigenicity
All AI viruses are Influenzavirus A or type A. Influenza viruses B and C. Types B and C occur in humans and rarely in seals and pigs. but neither has been isolated from birds. Influenzavirus A is further subtyped based on serologic reactions of the HA and NA surface glycoproteins or sequence analysis of HA and NA gene segments.
Sub-types On Antigenicity
Sixteen subtypes of HA (H1-16) and nine subtypes of NA (N1-9) are recognized for AI viruses. Serologic subtyping of HA is done by the hemagglutinin inhibition (HI) test and subtyping of NA by neuraminidase inhibition (NI) test. Most combinations of the 16 HA and 9 NA AI virus subtypes have been reported in domestic or wild birds.
Types Of Avian Influenza Infection
there are two types of infection found in birds 1) High pathogenic AI ( HPAI) 2) Low pathogenic AI (LPAI). So LPAI just only one of many subtypes in poultry.
Low Pathogenic Avian Influenza
Low Pathogenic AI (H9N2) just only one of the subtypes in poultry. It is referred to as the disease named caused by infection with avian (bird) influenza (flu) Type A viruses in poultry. its also known Bird Flu.
See Also- Clinical Signs Of Low Pathogenic Avian Influenza (LPAI) In Poultry
Avian Influenza Treatment is a very difficult task ever in the field industry. But, all types of AI are controllable except H5 type strain. It is an infectious disease, which is caused by influenza type A virus. The virus causes clinical symptoms that range from mild or even asymptomatic to an acute, fatal form. AI treatment based on the following observation.