"Virus isolation" refers to the process of keeping a virus separate from others in order to study it or prevent it from spreading further. Full definition
Multiple tissue specimens should be submitted to a laboratory for virus isolation, bacterial culture, and microscopic examination. (lowchensaustralia.com)
Diagnosis If a dog is showing signs of infection for less than 72 hours, canine influenza can be diagnosed by virus isolation from a swab of the throat area. (lowchensaustralia.com)