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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.
May 16, 2024 · 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 viruses normally spread between birds. However, some viruses have been found to infect humans. When avian influenza infects humans,...
- The primary risk factor for humans is exposure to infected live or dead poultry or contaminated environments, such as live bird markets. Slaughteri...
- As much as possible, residents and travellers in countries with known outbreaks of avian influenza in birds should avoid: poultry farms contact wit...
- Seek medical care immediately if you live in or have recently visited an area experiencing an outbreak and you are suffering flu-like symptoms such...
- Meat products and eggs can be safely consumed, provided they are properly prepared because influenza viruses are inactivated by thorough cooking. P...
- No vaccine for the prevention of avian influenza infections in humans is commercially available. WHO is working with partners on vaccine developmen...
- WHO does not recommend travel restrictions related to avian influenza. However, travellers can take certain measures to reduce the risk of infectio...
- Key Facts
- Overview
- Pandemic Potential
- Signs and Symptoms in Humans
- Epidemiology of Human Infections
- Diagnosis
- Treatment
- Prevention
- Who Response
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) represe...Exposure to animal influenza viruses can lead to infection and disease in humans – ranging from mild, flu-like symptoms or eye inflammation to severe, acute respiratory disease and/or death. Diseas...Currently circulating zoonotic influenza viruses have not yet demonstrated sustained person-to-person transmission.There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease in humans although only type A viruses can cause global pandemics based on current knowledge and understanding. Influenza A viruses are established in many animal species. The emergence of an influenza A virus, wi...
There will be pandemics in future, but when, where and how they spread is difficult to predict. They can have significant health, economic and social consequences. An influenza pandemic will occur when an influenza virus emerges with the ability to cause sustained human-to-human transmission, and the human population has little to no immunity again...
Exposure to avian influenza viruses can lead to infection and disease in humans, ranging from mild, flu-like symptoms or eye inflammation to severe, acute respiratory disease and/or death. Disease severity will depend upon the virus causing the infection and the characteristics of the infected individual. Rarely, gastrointestinal and neurological s...
Human infections with avian and other zoonotic influenza viruses, though rare, have been reported sporadically. Direct or indirect contact with infected animals represent a risk for human infection. Current zoonotic influenza viruses have not demonstrated sustained person-to-person transmission. For avian influenza viruses, the primary risk factor ...
Laboratory tests are required to diagnose human infection and testing should be done at a lab capable of safely processing and confirming zoonotic infections. The collection of appropriate specimens from suspected human cases for virus identification and the rapid and precise characterization of the virus and/or its isolate is done at specialized r...
If a person is suspected of having zoonotic influenza, the health authorities should be notified and appropriate clinical case management provided, including testing, triage, clinical assessment for disease severity classification, assessment of risk factors for severe disease, and isolation and treatment (for example, with antivirals and supportiv...
Influenza viruses are impossible to eradicate and zoonotic infections will continue to occur. To minimize public health risk, quality surveillance in both animal and human populations, thorough investigation of every human infection and risk-based pandemic planning are essential. Public health and animal health authorities should work together and ...
WHO continuously monitors avian and other zoonotic influenza viruses closely through its Global Influenza Surveillance and Response System (GISRS). WHO, in collaboration with the World Organisation for Animal Health (WOAH) and the Food and Agriculture Organization of the United Nations (FAO), conducts surveillance at the human-animal interface, ass...
Apr 17, 2024 · Avian influenza, commonly called “bird flu,” is a viral infection that usually spreads in birds but can sometimes spread to humans. Influenza A(H5N1) is the most common cause in humans. It can cause severe respiratory symptoms.
May 3, 2024 · Avian influenza refers to disease in birds caused by infection with avian (bird) influenza (flu) Type A viruses. Causes. Avian influenza A viruses have been isolated from more than 100 different species of wild birds around the world.
Avian influenza or bird flu refers to the disease caused by infection with avian (bird) influenza (flu) Type A viruses. View All. This page provides links to the latest H5N1 bird flu information.
Jun 8, 2024 · 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.
