Bird flu, also called avian influenza, is a viral infection that
can also infect humans and other animals. Most forms of the virus are
restricted to birds.
H5N1 is the most common form of bird flu. It’s deadly to birds, and
can easily affect humans and other animals that come in contact with a carrier.
According to the World
Health Organization, H5N1 was first discovered in humans in 1997, and has killed
nearly 60 percent of those infected.
Currently, the virus isn’t known to spread via human-to-human
contact. Still, some experts worry that H5N1 may pose a risk of becoming a
pandemic threat to humans.
You may have H5N1 if you experience typical flu-like symptoms such
- respiratory difficulties
- fever (over 100.4°F)
- muscle aches
- runny nose
- sore throat
If you’re exposed to bird flu, you should notify staff before you
arrive at the doctor's office or hospital. Alerting them ahead of time will
allow them to take precautions to protect staff and other patients before
caring for you.
Causes Bird Flu?
Although there are several types of bird flu, H5N1 was the first
avian influenza virus to infect humans. The first infection occurred in Hong
Kong in 1997. The outbreak was linked to handling infected poultry.
H5N1 occurs naturally in wild waterfowl, but it can spread easily
to domestic poultry. The disease is transmitted to humans through contact with
infected bird feces, nasal secretions, or secretions from the mouth or eyes.
Consuming properly cooked poultry or eggs from infected birds
does not transmit the bird flu, but eggs should never be served runny. Meat is
considered safe if it has been cooked to an internal temperature of 165ºF.
Are Bird Flu Risk Factors?
H5N1 has the ability to survive for extended periods of time.
Birds infected with H5N1 continue to release the virus in feces and saliva for
as long as 10 days. Touching contaminated surfaces can spread the infection.
You may have a greater risk of contracting H5N1 if you are:
- a poultry farmer
- a traveler visiting affected areas
- exposed to infected birds
- someone who eats undercooked poultry or eggs
- a healthcare worker caring for infected patients
- a household member of an infected person
Is Bird Flu Diagnosed?
The U.S. Food
and Drug Administration has approved a test designed to identify avian
influenza. The test is called influenza A/H5 (Asian lineage) virus real-time
RT-PCR primer and probe set. It can offer preliminary results in only four
hours. However, the test isn’t widely available.
Your doctor may also perform the following tests to look for the
presence of the virus that causes bird flu:
- auscultation (a test that detects abnormal
- white blood cell differential
- nasopharyngeal culture
- chest X-ray
Additional tests can be done to assess the functioning of your
heart, kidneys, and liver.
the Treatment for Bird Flu?
Different types of bird flu can cause different symptoms. As a
result, treatments may vary.
In most cases, treatment with antiviral medication such as
oseltamivir (Tamiflu) or zanamivir (Relenza) can help reduce the severity of
the disease. However, the medication must be given within 48 hours after
symptoms first appear.
The virus that causes the human form of the flu can develop resistance
to the two most common forms of antiviral medications, amantadine and
rimantadine. These medications shouldn’t be used to treat the disease.
Your family or others in close contact with you might also be
prescribed antivirals as a preventive measure, even if they aren’t sick. You’ll
be placed in isolation to avoid spreading the virus to others.
Your doctor may place you on a breathing machine if you develop a
the Outlook For Someone with Bird Flu?
The outlook for bird flu infection depends on the severity
of infection and the type of influenza virus causing it. H5N1 has a high
mortality rate, while other types don’t.
Some potential complications include:
- sepsis (a possibly fatal inflammatory response
to bacteria and other germs)
- organ failure
- acute respiratory distress
Call your doctor if you have flu symptoms within 10 days of
handling birds or traveling to areas with a known avian flu outbreak.
Is Bird Flu Prevented?
Your doctor may recommend you get a flu shot, so you don’t also
get a human strain of influenza. If you develop both the avian flu and human
flu at the same time, it could create a new and possibly deadly form of the
The CDC has issued no recommendations against traveling to
countries that are affected by H5N1. However, you can minimize your risk by
- open air markets
- contact with infected birds
- undercooked poultry
Be sure to practice good hygiene and wash your hands regularly.
The FDA has approved a vaccine designed to protect against the
avian flu, but the vaccine isn’t currently available to the public. Experts
recommend that the vaccine be used if H5N1 begins to spread among people.