Final answer:
inoculation of laboratory animals is an in vivo method of viral cultivation, used for virus research, diagnostics, vaccine production, and understanding host immune responses.
Step-by-step explanation:
Inoculation of laboratory animals is an in vivo method of viral cultivation.
In vivo refers to the method where viruses are studied within a living organism, which can include animals, embryos, or plant cells. This method is opposite to in vitro, where studies are conducted in a controlled environment outside of a living organism. When experimenting with viruses, the use of laboratory animals is a form of in vivo cultivation, vital for multiple reasons. It is crucial for the identification and diagnosis of viral pathogens in clinical specimens, the production of vaccines, and for conducting basic research. For instance, the influenza vaccine is typically cultured in embryonated chicken eggs, a method that falls under the in vivo category. This method also plays a significant role in following Koch's postulates for establishing causative relationships between pathogens and diseases, and in understanding how the host's immune system responds to an infection.