title: Marin County agent, an astrovirus.
mesh_terms: D005759:Gastroenteritis / Q000209:etiology; D006801:Humans; D001257:Mamastrovirus / Q000302:isolation & purification*; D014777:Virus Diseases / Q000209:etiology; D014713:Viruses, Unclassified / Q000302:isolation & purification*