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Understanding Influenza: Types, Characteristics, and Common Traits

Explore the shapes, characteristics, and behaviors of different influenza virus types. Learn about antigenic drift and shift, and how they impact worldwide health. Discover what makes flu viruses unique and how they continue to evolve.

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Understanding Influenza: Types, Characteristics, and Common Traits

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Presentation Transcript

  1. Introduction

  2. Shapes

  3. Characteristics non living parasitic Reproduce Mutate

  4. What do all of these viruses have in common?

  5. Types • A= antigenic drift/shift • causes worldwide death • Both humans and other animals • B= antigenic drift • Can cause death/less severe • Usually only in humans • C=antigenically stable • Mild illnesses only in humans

  6. Terminology • Antigenic drift • natural mutation causing minor changes to surface proteins hemagglutinin(H) and neuraminidase(N) • Frequently occurs in Types A,B,& C

  7. Terminology • Antigenic shift • Only Type A (humans and other animals) • Combination of 2 or more viral strains H1N1 + H5N3= H5N1 or H1N3 • Leads to reassortment of phenotype

  8. Summary • Flu viruses all have a common sphere shape, capsid, genetic material • Types: A, B, and C • Mutations lead to subtypes and strains

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