title: New aspects of old pathogens of pneumonia.
abstract: Changes in the microorganism or in the host have resulted in exciting new aspects of several old pathogens of pneumonia. Penicillin-resistant Streptococcus pneumoniae, methicillin-resistant Staphylococcus aureus, and "toxic strep" are examples of changes in the microorganisms. Host changes have resulted in Mycoplasma pneumoniae now emerging as a cause of pneumonia in the elderly.
authors.affiliation: Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
authors.forename: T J
authors.initials: TJ
authors.lastname: Marrie
mesh_terms: D006801:Humans; D011014:Pneumonia / Q000382:microbiology*