1.4 Chemical Determination. Proteins are complex, organic compounds composed of many amino acids linked together through peptide bonds and cross-linked between chains by sulfhydryl bonds, hydrogen bonds and van der Waals forces.
Common causes of pleurisy include trauma, postcardiac injury, infection (i.e., viral, bacterial, or parasitic), respiratory illness, caustic exposure (i.e., drug-induced), autoimmune disease, and malignancy (TABLE 1).
Causes of pleurisy include: 1  A viral infection, such as the flu (influenza) 2  A bacterial infection, such as pneumonia. 3  A fungal infection.  Autoimmune disorder, such as rheumatoid 1  arthritis. Certain medications.  Lung cancer near the pleural 1  surface. Rib fracture.  Certain inherited diseases, such as sickle cell disease.