Cytopathogenic Effect, Viral

**Definition:** Visible morphologic changes in cells infected with viruses. It includes shutdown of cellular RNA and protein synthesis, cell fusion, release of lysosomal enzymes, changes in cell membrane permeability, diffuse changes in intracellular structures, presence of viral inclusion bodies, and chromosomal aberrations. It excludes malignant transformation, which is CELL TRANSFORMATION, VIRAL. Viral cytopathogenic effects provide a valuable method for identifying and classifying the infecting viruses.

**Tree numbers:** - E01.370.225.500.384.235 - E05.200.500.384.235 - E05.242.384.235 - G06.920.190

**Synonyms:** - Viral Cytopathogenic Effect - Cytopathic Effect, Viral