Systematic Veterinary Virology

VIRUS STRAINS

• Flury, Street-Alabama-Dufferin [SAD], Vnukovo and Kelev. Rabies viruses are also referred as Street viruses and fixed viruses.
• Street viruses refer to virulent viruses obtained from rabid animals and fixed viruses are those, which are adapted in laboratories by passaging them in animals such as rabbits.
• Fixed viruses are characterised by a shortened incubation period and multiplies faster. Fixed virus also loses their ability to form Negri bodies, less pathogenic, stable and are used for vaccine production.