What is the difference between HPAI and LPAI?

A difference exists in the virus classification; one is low pathogenic (LPAI) and the other is highly pathogenic (HPAI). Pathogenicity refers to the ability of the virus to produce disease. HPAI H5N1, often referred to as the “Asian” H5N1, is the type causing worldwide concern.

Is avian influenza pathogenic?

The Avian influenza A subtype H5N1 is a highly pathogenic (HPAI) strain of the virus that has been confirmed in poultry populations across Asia, Russia and some southern European countries. Although this is a disease of birds it has been shown in S.E. Asia that it can (although rarely) be transmitted to humans.

What does highly pathogenic avian influenza mean?

Highly pathogenic (HP) avian influenza (AI) (HPAI) is an extremely contagious, multi-organ systemic disease of poultry leading to high mortality, and caused by some H5 and H7 subtypes of type A influenza virus, family Orthomyxoviridae.

What is AI in chickens?

Avian influenza (AI) is caused by an influenza type A virus which can infect poultry (such as chickens, turkeys, pheasants, quail, domestic ducks, geese, and guinea fowl) and is carried by free flying waterfowl such as ducks, geese and shorebirds.

How many types of avian influenza viruses are there?

Avian Influenza A(H5) Viruses There are nine known subtypes of A(H5) viruses [1.34 KB, 15 Pages] [A(H5N1), A(H5N2), A(H5N3), A(H5N4), A(H5N5), A(H5N6), A(H5N7), A(H5N8), and A(H5N9)]. Most A(H5) viruses identified worldwide in wild birds and poultry are LPAI, but occasionally HPAI A(H5) viruses have been detected.

Is avian influenza a notifiable disease?

Avian influenza (bird flu) mainly affects birds. It can also affect humans and other mammals. Avian influenza (bird flu) is a notifiable animal disease.

Can chickens survive avian flu?

Bird Flu is a serious poultry disease and requires rapid response because it is highly contagious and can be fatal to chickens. Animal and Plant Health Inspection Service (APHIS) works with its federal, state, local and industry partners to quickly respond to any bird flu findings.

What are 5 influenza types?

There are four types of influenza viruses: A, B, C and D. Human influenza A and B viruses cause seasonal epidemics of disease (known as flu season) almost every winter in the United States. Influenza A viruses are the only influenza viruses known to cause flu pandemics, i.e., global epidemics of flu disease.