Chapter Outlines
Chapter 4 Virus Architecture and Nomenclature
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4.1 Virus Properties
- Protection
- Recognition
- Self-Assembly
- Fidelity
- Economy
4.2 Virus Structure and Morphology
- Stability
- Two Types of Viral Shapes
Enveloped virus particles
4.3 Baltimore Classification
- Created by David Baltimore
- 7 classes
- Viruses grouped by type of nucleic acids they possess and its replication scheme.
- I. dsDNA viruses
- II. ssDNA viruses
- III. dsRNA viruses
- IV. +ssRNA viruses
- V. -ssRNA viruses
- VI. RNA reverse transcribing viruses
- VII. DNA transcribing viruses
4.4 Taxonomy: What’s in a Name?
- Definition of viruses
- Use of Porcelain Chamberland Filter
- Electron microscopy
4.5 The International Committee on Taxonomy of Viruses (ICTV)
- Charged with developing a universal taxonomic scheme to name and classify viruses.
- ICTV database
- Based on physical and chemical properties.
- Order (-virales)
- Family (-viridae)
- Subfamily (-virinae)
- Genus (-virus)
- Common names
Additional Hierarchical Levels and Definitions
- Species
- Type-Species
- Strain
- Variant
Specialty Groups and Collections
- WHO Collaborating Centers for Reference and Research on Influenza
- WHO Food and Agricultural Organization of the United Nations
- American Type Culture Collection (ATCC)
- Viral Disease Syndromes Overlap
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