title: Isolation of variants during passage of a strain of foot-and-mouth disease virus in partly immunized cattle.
mesh_terms: D000818:Animals; D005537:Aphthovirus / Q000276:immunology*; D002417:Cattle; D003168:Complement Fixation Tests; D005536:Foot-and-Mouth Disease / Q000276:immunology; D006168:Guinea Pigs; D009500:Neutralization Tests; D014611:Vaccination; D014776:Virus Cultivation