For a dog, bug bites can result in severe life threatening symptoms. Allergic reactions occur when the immune system produces antibodies that stimulate certain cells to produce chemicals. These chemicals cause the allergic reactions that are meant to protect the body from the intrusive bug bite.
Restrictive lung disease. Restrictive lung disease (chest wall diseases) can result from different problems, including interstitial fibrosis, scoliosis (spine curvature), and sarcoidosis. Some cause scarring in the lungs, while others compress the lungs. Some have no known cause; other causes include occupational exposure, chemotherapeutic agents or radiation, and connective tissue diseases such as lupus or rheumatoid arthritis.
Lung scarring. Lung scarring: Introduction. Lung scarring: Damage to the lung tissue from and cause can cause scarring of the lung tissue. Small scars generally cause no problems but large or widespread scarring can affect breathing. Causes of lung scarring include pneumonia, lung infections, cystic fibrosis, asbestosis, silicosis and sarcoidosis and tuberculosis.