PATHOLOGY

Detailed explanation-1: -bird flu, also called avian influenza, a viral respiratory disease mainly of poultry and certain other bird species, including migratory waterbirds, some imported pet birds, and ostriches, that can be transmitted directly to humans.

Detailed explanation-2: -Avian influenza, also known as bird flu, is a type of zoonotic (or animal) influenza that affects wild birds and poultry and is caused by virus sub-types A(H5N1), A(H9N2). Avian influenza has occasionally infected humans; however it does not easily transmit between humans.

Detailed explanation-3: -However, if this were to occur, the community-level spread is considered unlikely as the virus does not have the ability to transmit easily among humans. To date, there is no evidence of sustained human-to-human transmission of avian influenza A(H7N9) virus.

Detailed explanation-4: -Bird flu or avian flu is a form of viral Highly Pathogenic Avian Influenza (HPAI)) infection.