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.
Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis. Breathing in dust or other particles in the air is responsible for some types of interstitial lung diseases. Specific types include. Black lung disease among coal miners, from inhaling coal dust. Farmer's lung, from inhaling farm dust.