Avian influenza - Wikipedia
Avian influenza, also known as avian flu or bird flu, is a disease caused by the influenza A virus, which primarily affects birds but can sometimes affect mammals including humans. [1] Wild aquatic birds are the primary host of the influenza A virus, which is enzootic (continually present) in many bird populations.
H5 Bird Flu: Current Situation | Bird Flu | CDC - Centers for Disease ...
4 天之前 · Clinicians can visit CDC's avian influenza (bird flu) information for health professionals for the latest guidance. Learn more.
Avian Influenza Type A | Bird Flu | CDC - Centers for Disease …
2024年12月20日 · 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 .
Avian Influenza in Birds: Causes and How It Spreads
2024年5月3日 · Avian influenza refers to disease in birds caused by infection with avian (bird) influenza (flu) Type A viruses. Avian influenza A viruses have been isolated from more than 100 different species of wild birds around the world.
Influenza: Avian - World Health Organization (WHO)
2024年5月16日 · Avian influenza, sometimes known as bird flu, is a disease caused by a virus that mainly affects birds but can also affect mammals, including humans. It primarily spreads from infected birds to humans through close contact with birds or contaminated environments, such as in backyard poultry farm settings and at markets where birds are sold.
Avian Influenza (Bird Flu): H5N1, Causes, Symptoms & Treatment
2024年12月5日 · Avian influenza, commonly called “bird flu,” is a viral infection that spreads in birds, cows and other animals. It can sometimes spread to people. In humans, H5 subtypes of influenza A are the most common cause.
Bird flu (avian influenza) - Symptoms and causes - Mayo Clinic
2024年6月8日 · Bird flu, also called avian influenza, is caused by influenza type A virus infections in bird species. Depending on the strain, bird flu may cause the bird to have no symptoms, mild illness, serious illness or lead to the death of the bird. Bird flu rarely infects humans.
Influenza (Avian and other zoonotic) - World Health Organization …
2023年10月3日 · Humans can be infected with avian, swine and other influenza viruses. Direct contact with infected animals (through handling, culling, slaughtering or processing) or indirect contact (through environments contaminated with bodily fluids from infected animals) represent a risk for human infection.
H5N1 Bird Flu: What You Need to Know > News - Yale Medicine
2025年1月7日 · "Avian influenza A (H5N1)," "bird flu," and "H5N1 bird flu" all refer to an illness caused by influenza type A viruses, which primarily affect birds. H5N1 bird flu was first identified in geese in China in 1996 and in people in Hong Kong the following year.
Avian influenza - World Health Organization (WHO)
Human infection with avian influenza A (H5N1) virus: From 1 January 2003 to 21 December 2023, a total of 248 cases of human infection with avian influenza A (H5N1) virus were reported from four countries within the Western Pacific Region (Table 1). Of these cases, 139 were fatal.