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Avian flu

Avian influenza refers to the disease caused by infection with avian (birdinfluenza (flu) Type A viruses. These viruses occur naturally among wild aquatic birds worldwide and can infect domestic poultry and other bird and animal species.

Symptoms begin within two to eight days and can seem like the common flu. Cough, fever, sore throat, muscle aches, headache and shortness of breath may occur.
The disease can carry a high mortality in humans. Some antiviral drugs, if taken within two days of symptoms, may help.
Auditory processing disorder

Auditory processing disorder (APD) is a hearing problem that affects about 5% of school-aged children. Kids with this condition, also known as central auditory processing disorder (CAPD), can't process what they hear in the same way other kids do. This is because their ears and brain don't fully coordinate.

Symptoms include difficulty understanding speech in noisy environments, following instructions and distinguishing between similar sounds.
Treatments may include environmental modifications, such as the use of listening devices, and working with a therapist.
Atrial fibrillation

Atrial fibrillation is an irregular and often rapid heart rate that occurs when the two upper chambers of your heart experience chaotic electrical signals. The result is a fast and irregular heart rhythm. The heart rate in atrial fibrillation may range from 100 to 175 beats a minute.

This condition may have no symptoms, but when symptoms do appear they include palpitations, shortness of breath and fatigue.
Treatments include drugs, electrical shock (cardioversion) and minimally invasive surgery (ablation).
Atopic eczema

Atopic dermatitis (eczema) is a condition that makes your skin red and itchy. It's common in children but can occur at any age. Atopic dermatitis is long lasting (chronic) and tends to flare periodically. It may be accompanied by asthma or hay fever. No cure has been found for atopic dermatitis.

The main symptom is a rash that typically appears on the arms and behind the knees, but can also appear anywhere.
Treatment includes avoiding soap and other irritants. Certain creams or ointments may also provide relief from the itching.
Ataxia
Ataxia is a degenerative disease of the nervous system. Many symptoms of Ataxia mimic those of being drunk, such as slurred speech, stumbling, falling, and incoordination. These symptoms are caused by damage to the cerebellum, the part of the brain that is responsible for coordinating movement.
Astigmatism

Astigmatism is a common vision problem caused by an error in the shape of the cornea. With astigmatism, the lens of the eye or the cornea, which is the front surface of the eye, has an irregular curve. This can change the way light passes, or refracts, to your retina. This causes blurry, fuzzy, or distorted vision.

Treatments include prescription glasses or contact lenses. Laser-assisted surgery, such as LASIK, may also help.