Comparison of an attenuated and virulent louping ill strain.
D000818:Animals; D004660:Encephalitis; D004671:Encephalitis, Arbovirus / Q000821:virology*; D058872:Epidemics; D008146:Louping Ill; D012756:Sheep; D014777:Virus Diseases
ENCEPHALITIS, EPIDEMIC/virology; VIRUS DISEASES/experimental