Viruses. But first…Classification Recap.

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Presentation transcript:

Viruses

But first…Classification Recap

And now back to Viruses! 2.2

Living vs. Non-Living? Organization (Cells) Metabolism Responsiveness Growth Reproduction Evolution Ecology

Examples of Viral Diseases common cold, chicken pox, AIDS, cholera, rabies, influenza, hepatitis B, cold sores, measles, mumps, pneumonia, etc. hepatitis C & links to liver cancer many animal & plant viruses

Epidemic vs. Pandemic limited vs. widespread (usually global) geographic region Have you seen this film? yuuLk5g yuuLk5g

Host Range most are very specific some can infect many species bacteriophage infects bacteria cells

Basic Structure protein capsid genetic material (DNA or RNA)

Classification

Viral Reproduction lytic cycle (lysis) lysogeny (dormancy)

Vaccinations global elimination of smallpox by WHO in 1980 human papillomavirus (HPV) & connection to cervical cancer

Gene Therapy

Viroids small infectious pieces of RNA without capsid discovered in 1971 responsible for some plant diseases

Prions abnormally-shaped infectious proteins cause rare diseases in mammals consumption of infected animals causes prions to enter blood and travel to brain