What is bird flu?

What is bird flu?

Bird flu, scientifically known as avian influenza, is a viral infection caused by specific strains of Influenza A viruses that utilize wild aquatic birds as their natural reservoir. While these viruses primarily infect poultry and wild birds, they have the potential to mutate and spread to other animal species, and in rare cases, they may transmit to humans, causing illnesses of varying severity [1][3].

Influenza A viruses are classified based on the proteins on their surface. Strains such as H5N1, H7N9, and H5N6 are among the types most commonly associated with human infections [1]. It should be noted that human infections with these viruses are rare, but they are a medical concern because they can lead to severe clinical conditions requiring healthcare [2].

How is the infection transmitted to humans?

Transmission usually occurs as a result of direct or indirect contact with infected animals, whether alive or dead. Risks increase in environments such as live bird markets, farms, or when handling infected poultry carcasses [2]. Key exposure routes include:

• Touching infected birds or surfaces contaminated with the feces or secretions of these animals, then touching the eyes, nose, or mouth [1][2].
• Inhaling droplets or dust containing the virus in areas where infected birds or livestock are present [1].
• Direct handling of other infected animals, such as certain mammals like cows, cats, and dogs, which can transmit the virus to humans [1][3].

It is important to clarify that consuming poultry or eggs that have been properly cooked and prepared does not constitute a source of virus transmission, and there is no scientific evidence linking well-cooked foods to infection [2][3].

Symptoms and Complications

Symptoms of human infection vary significantly; some individuals may show no symptoms, while others may experience flu-like symptoms, such as fever (which may exceed 38°C), cough, sore throat, muscle aches, and headache. Conjunctivitis (redness of the eyes) may also appear as an associated symptom [1][3].

Severe cases require caution, as the infection can progress to acute pneumonia, respiratory failure, or organ failure, which can be fatal [3]. If you have been exposed to infected birds or livestock or have been in an affected area, you should monitor your health for 10 days. If symptoms appear, you should contact a healthcare provider immediately, while ensuring you report the history of exposure before visiting the clinic, to allow for necessary preventative measures [3].

Prevention and Medical Management

Although there is currently no vaccine available to the general public, governments maintain stockpiles of vaccines specifically for certain strains like H5N1 that can be used when necessary [3]. For prevention, you should avoid wild birds and sick animals, wear protective equipment when handling livestock or birds in the workplace, and wash your hands consistently [1][2]. For more on safety measures, you can review Understanding Bird Flu Risks and Prevention (Arabic). If infection is suspected, medical treatment relies on antiviral drugs, which are most effective when started within 48 hours of symptom onset [3].

Medical references

• Bird Flu
• Influenza (avian and other zoonotic)
• Avian influenza