TY - CHAP M1 - Book, Section TI - MEDICAL VIROLOGY A1 - Wang, Fred A1 - Kieff, Elliott A2 - Kasper, Dennis L. A2 - Fauci, Anthony S. PY - 2017 T2 - Harrison's Infectious Diseases, 3e AB - Viruses are obligate intracellular parasites. They consist of a DNA or RNA genome surrounded by protein. They may also have an outer-membrane lipoprotein envelope. Viruses can replicate only within cells because their nucleic acid does not encode many enzymes necessary for the metabolism of proteins, carbohydrates, or lipids or for the generation of high-energy phosphates. Typically, viral nucleic acids encode messenger RNA (mRNA) and proteins necessary for replicating, packaging, and releasing progeny virus from infected cells. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/25 UR - accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141410493 ER -