Search results
Avian influenza A viruses are classified into the following two categories: low pathogenicity avian influenza (LPAI) A viruses, and highly pathogenic avian influenza (HPAI) A viruses. The categories refer to molecular characteristics of a virus and the virus' ability to cause disease and mortality in chickens in a laboratory setting .
It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. [2] . Mammals in which different strains of IAV circulate with sustained transmission are bats, pigs, horses and dogs; other mammals can occasionally become infected. [3][4]
Avian influenza (historically known as fowl plague) is caused by bird-adapted strains of the influenza type A virus. [4] The disease was first identified by Edoardo Perroncito in 1878 when it was differentiated from other diseases that caused high mortality rates in birds; in 1955 it was established that the fowl plague virus was closely ...
The natural reservoir of influenza A strains is a diverse pool of viruses among aquatic wild bird populations – the avian influenza (AI) viruses. These viruses are of high pathogenicity (HPAI) and low pathogenicity (LPAI), according to their severity in the avian species they usually infect.
17 lut 2022 · Highly pathogenic avian influenza viruses (HPAIV) cause high mortality in infected chicken, while low pathogenic viruses (LPAIV) result in mild disease or asymptomatic infection. HPAIV A(H5N1) is highly infectious for a number of bird species, including most species of domestic poultry [1].
3 paź 2023 · Influenza type A viruses are classified into subtypes according to the combinations of the proteins on the surface of the virus. When animal influenza viruses infect their host species, they are named according to the host – as avian influenza viruses, swine influenza viruses, equine influenza viruses, canine influenza viruses, etc.
Thus, avian influenza viruses (AIVs) can be separated into two pathotypes, namely, high pathogenicity (HP) or low pathogenicity (LP) AIVs. 5 Some HPAI strains of the H5 (e.g., H5N1) and H7 (e.g., H7N1, H7N3, and H7N7) subtypes have demonstrated high lethality in chickens (up to 100% mortality) with wide tissue (extrapulmonary) distribution of vi...
