American literature is the literature written or produced in the area of the United States and its preceding colonies. For more specific discussions of poetry and theater, see Poetry of the United States and Theater in the United States.illiam Faulkner (1897â1962) is notable for novels like The Sound and the Fury. American drama attained international status only in the 1920s and 1930s, with the works of Eugene O'Neill, who won four Pulitzer Prizes and the Nobel Prize.
1 Several types of bacteria, including Legionella pneumophila, Mycoplasma pneumoniae, and Chlamydophila pneumoniae, cause atypical pneumonia. 2  It is sometimes called  walking pneumonia and is referred to as atypical because its symptoms differ from those of other types of bacterial pneumonia.
Many different germs can cause pneumonia, but there are five main causes: bacteria, viruses, mycoplasma (a type of bacteria that is resistant to penicillin), other infectious agents, such as fungi, and various chemicals. If you have viral pneumonia, you also are at risk of getting bacterial pneumonia. The main cause of pneumonia is the bacteria streptococcus pneumoniae. Professor Brian Duerden CBE, the chief micro-biologist at the Department of Health, said the bacteria can also cause or lead to numerous other invasive infections. It can cause other chest infections in old people as well as pneumonia, he said. It can affect young children when it can get into their blood streams. It can cause septicemia. It is also the most important cause of meningitis in very young children. In some people it can get into the sinuses and into the middle ear and cause further infection. Understanding the cause of pneumonia is important because pneumonia treatment depends on its cause.