title: An improved method for titration of mouse hepatitis virus type 3 in a mouse cell culture.
mesh_terms: D000818:Animals; D002460:Cell Line; D003588:Cytopathogenic Effect, Viral / Q000187:drug effects; D003637:DEAE-Dextran / Q000494:pharmacology; D007928:Lethal Dose 50; D051379:Mice; D006517:Murine hepatitis virus / Q000302:isolation & purification*; D014357:Trypsin / Q000494:pharmacology; D010948:Viral Plaque Assay / Q000379:methods*
chemical_list: D003637:DEAE-Dextran; D014357:Trypsin