2 Ergebnisse.

Opening Lecture.- 1 Attentuation in the Control of Gene Expression in Animal Viruses.- Reassortment of Viruses with Divided Genome.- 2 The Use of Reassortant Bunvaviruses to Deduce Their Coding and Pathogenic Potentials.- 3 Genetic Diversity of Buvnaviruses and Mechansisms of Genetic Variation.- 4 Variations In Rift Valley Fever Virus.- Molecular Mechanisms In Acute, Persistent and Latent Infections.- 5 Pathogenic Aspects of Murine Coronavirus...

Venezuelan equine encephalitis (VEE) virus was first isolated in 1938 by Kubes and Rios (1) from the brain of a horse which died during an epizootic of a previously unrecognized disease in Venezuela. VEE-related viruses were subsequently isolated during t~e period of 1943-1963 in Venezuela, Colombia, Peru, Trinidad, Brazil, Surinam, Argentina, Panama, Mexico, and the United States (2) . Shope et ~. (3) fi rst defi ned the vi ru ses in the VEE ...