Symptoms of the bird flu include abdominal pain, diarrhea, pneumonia, vomiting and seizures, according to the Centers for Disease Control and Prevention. The disease can also mimic influenza symptoms including fever, coughing, sore throat and muscle aches.
The CDC mentions that the bird flu is also called the avian influenza A virus, and it can be relatively mild and nonfatal. This form of bird flu is associated with lower-respiratory illnesses that can turn into pneumonia, which require a visit to the hospital. Conjunctivitis is another symptom of low-level bird flu. Conjunctivitis is also known as pink eye, according to WebMD. The New York Times mentions that a person with bird flu can also have a fever of over 100.4 degrees Fahrenheit. Other fever-like symptoms in the form of headaches, runny nose and an ill feeling can occur.
The CDC notes that a severe form of bird flu is associated with a host of illnesses, including conjunctivitis, influenza-like symptoms and acute respiratory complications. According to MedicineNet, acute respiratory distress syndrome, otherwise known as ARDS, is a type of pneumonia that can be fatal, and it deprives the internal organs of oxygen. Those who have ARDS are most likely hospitalized while in this state. The CDC reports that bird flu can also cause multiple organ failure and neurological damage that results in seizures and mental degradation.