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Virology Lab 7: Viruses Definition and Importance

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Virology Lab 7: Viruses Definition and Importance

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Questions and Answers

What is the main principle of fluorescence microscopy in detecting viral antigens?

Measuring the size of viral particles

Detecting the morphology of virions

Detecting fluorescent dye linked to antibody molecules (correct)

Observing the inclusion bodies in the nucleus

What is the term for the structural changes in a host cell resulting from viral infection?

Inclusion bodies formation

Viral growth

Cell transformation

Cytopathogenic effect (correct)

Which of the following is an example of cytopathogenic effect?

Giant cell formation in measles

Inclusion bodies in the nucleus

Cluster formation in adenovirus (correct)

Cell transformation

What is the term for the formation of a giant cell with many nuclei?

Syncytium formation Signup and view all the answers

What is the term for the change in growth characteristics of infected cells?

Cell transformation Signup and view all the answers

What are inclusion bodies?

Nuclear or cytoplasmic aggregates of virus particles Signup and view all the answers

What is the composition of Negri bodies in rabies infected brain cells?

Rabies virus proteins and RNA Signup and view all the answers

What is the appearance of Gaurnieri bodies in Poxvirus-infected epithelial cells?

Pink blobs in the cytoplasm Signup and view all the answers

What is the characteristic appearance of intranuclear inclusions in cytomegalovirus infection?

Owl's eye intranuclear bodies Signup and view all the answers

What is the location of Negri bodies in rabies infected brain cells?

Cytoplasm of infected neurons Signup and view all the answers

What is the virus associated with Nuclear bodies?

Adenovirus Signup and view all the answers

What is the characteristic of viruses that defines them as obligate intracellular parasites?

They depend on the host for their survival. Signup and view all the answers

What is the principle of phage typing of bacteria?

Bacterial strains are grown on a suitable culture medium and then subjected to attack by a series of different known phages. Signup and view all the answers

What is the purpose of Viral Transport Medium (VTM)?

To preserve viral infectivity within the specimen and prevent it from drying. Signup and view all the answers

What is the name of the continuous cell line used in tissue culture for virus cultivation?

Hela cell Signup and view all the answers

What is the method used to determine the number of viral particles in a sample?

Plaque assay Signup and view all the answers

What is the name of the solution that must be present in Viral Transport Medium (VTM)?

Hank's solution Signup and view all the answers