Viruses
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Viruses. Viruses. Non living Cannot reproduce on their own Reproduction Need a host cell Extremely small. Viral Structure. No nucleus Genetic Material DNA or RNA Capsid around outside. Viral Reproduction. Viruses need a specific host cell Virus injects DNA or RNA into cell

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Viruses

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Viruses

Viruses


Viruses1

Viruses

  • Non living

    • Cannot reproduce on their own

  • Reproduction

    • Need a host cell

  • Extremely small


Viral structure

Viral Structure

  • No nucleus

  • Genetic Material

    • DNA or RNA

  • Capsid around outside


Viral reproduction

Viral Reproduction

  • Viruses need a specific host cell

    • Virus injects DNA or RNA into cell

    • Cell produces more viruses

    • Host cell is destroyed at end of viral reproduction


Viral transmission

Viral Transmission

  • Airborne

  • Sexual Contact

  • Contaminated food or water

  • Animal bites


Human immunodeficiency virus hiv

Human Immunodeficiency Virus (HIV)

  • Attacks Helper T Cells

    • T-Cells fight disease

  • Disables immune system

  • Person dies from secondary infection

  • Transmitted

    • Sexual contact

    • Sharing needles


Influenza

Influenza

  • Transmitted by

    • Coughing

    • Sneezing

    • Contact

  • Symptoms

    • Fever

    • Headache

    • Severe aches and pains

    • Fatigue

    • Etc


Do antibiotics work on viruses

Do antibiotics work on viruses?

  • No

    • They are not living


Vaccines

Vaccines

  • Small amount of inactive virus

  • Help to prep body to defend against viruses


Reflection questions

Reflection Questions

  • 1. If you have a viral infection should you take antibiotics? Why or why not?

  • Name at least two viruses.

  • What does a virus need to reproduce?


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