1 The Democratic Party has changed significantly during its more than two centuries of existence. During the 19th century the party supported or tolerated slavery, and it opposed civil rights reforms after the American Civil War in order to retain the support of Southern voters.
There are many causes of scoliosis, including congenital spine deformities (those present at birth, either inherited or caused by the environment), neuromuscular problems, genetic conditions, and limb length inequality.
Primary bacterial diseases are caused by invasion of bacteria that cause disease with no other predisposing factors. Secondary bacterial diseases are caused by invasion of bacteria after a predisposing condition, such as viral infections, stresses, tissue injuries, and dietary upsets.A bacterial disease may affect a single tissue or organ, or it may affect multiple tissues and organs of the animal.iruses often infect specific types of cells causing damage to the tissues or organs that those cells make up. Similar to bacte-rial disease, viruses can be found in the bloodstream, which is called viremia. Viruses are causative agents of many types of animal diseases.