Table 1

Summary of the techniques described

ClassicalModern
Tissue culture of the nervous systemPolymerase chain reaction (PCR)
Virus isolationMolecular hybridisation methods including in situ hybridisation
Electron microscopyGene microarrays
Serological studiesMolecular analysis of viral isolates
Viral antigen detectionUse of viral and animal mutants in neuropathogenesis studies