Oncogenic Viruses- An Overview

Oncogenic Viruses

Viruses are intracellular pathogens that reproduce only in the living cell and manipulate the cellular machinery to produce more viruses. Viral replications can affect the cellular genes of the host in multiple cancerous ways. An oncovirus is a virus that can cause cancer. Viruses account … Read more

How viruses cause disease?

How viruses cause disease

Viruses gain access to the host through skin and mucous membranes, and via the respiratory, gastrointestinal, and genital tracts. Their virulence or lack of it may be determined by very small mutations in the genome. Viral infection of cells may … Read more

Positive staining of Viruses

Positive staining of Viruses

What is positive staining? Positive staining of viruses is similar to negative staining. The difference is that the virus image is darker formed on a light background, unlike the negative staining where a light viral particle image is formed on … Read more

Negative staining of Viruses

Negative staining of Viruses

What is the Negative staining of Viruses? Staining techniques are designed to show contrast under microscopic observation. The staining of viruses is done to increase the contrast between the virus and the background. The use of an electron microscope intensifies … Read more