Breathlessness, dry cough, 'flu like' feelings, headache and aching joints, sweating, exhaustion 2-6 hours after coming in contact with pigeons. If very sensitive, reaction can occur much quicker. A check of the blood for the reaction to pigeon protein would show raised levels. The normal body defence systems have responded to contact with pigeon protein. All people will tend to make antibody reaction against pigeon protein.
Some people make much more than others.
People with high reaction levels are more likely to get chest trouble than those with low reaction levels. YES - Those with severe symptoms have higher levels than those with minor problems. NOT if recognised and proper treatment and precautions are taken - It can, however, cause chronic ill health and permanent lung changes if it is severe enough and is not treated. NO - It is not an infectious disease. Go and see your own Doctor.