1 / 28

B.Sc: Biology / Medical Analysis / Jor. M.Sc.: Medical Microbiology / Jor.

Prof. Mamdoh Harahsha. B.Sc: Biology / Medical Analysis / Jor. M.Sc.: Medical Microbiology / Jor. Ph.D.: Medical Virology & Serology / UK. GENERAL PROPERTIES AND CLASSIFICATIONS. INTRODUCTION. Small Dependent on living cells Genome Have receptor-binding protein. Virus. Bacterium.

keilah
Download Presentation

B.Sc: Biology / Medical Analysis / Jor. M.Sc.: Medical Microbiology / Jor.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Prof. Mamdoh Harahsha • B.Sc: Biology / Medical Analysis / Jor. • M.Sc.: Medical Microbiology / Jor. • Ph.D.: Medical Virology & Serology / UK

  2. GENERAL PROPERTIES AND CLASSIFICATIONS

  3. INTRODUCTION • Small • Dependent on living cells • Genome • Have receptor-binding protein

  4. Virus Bacterium Animalcell Animal cell nucleus 0.25 m Comparing the size of a virus, a bacterium, and an animal cell

  5. Size of viruses

  6. Basic components of viruses Virion (Intact virus): • Capsid (capsomeres) • Nucleic acid Both  Nucleocapsid # Envelope

  7. Influenza virus

  8. Virus symmetry (Nucleocapsid) • Icosahedral • Helical • Complex

  9. Capsid and Capsomeres

  10. Helical

  11. Icosahedral

  12. Complex

  13. Electron Microscopy

  14. Virus genomes • # All DNA viruses ds EXCEPT Parvoviridae • # All RNA viruses ss EXCEPT Reoviridae • # Positive & Negative stranded RNA • # Exons & introns

  15. Virus genome & transcriptional maps DNA viruses • Herpes & Poxvirus 150 genes  No splicing (Large No. of genes) • Adenovirus 30 genes  Viral splicing • Parvovirus Few genes  Viral splicing

  16. RNA viruses • Poliovirus: +ve ssRNA • Rabies: -ve ssRNA • Coronavirus: +ve ssRNA

  17. Classification of Viruses • NA: DNA OR RNA • Number of strands of NA: ds or ss, • Forms: Linear, Circular, Continuous (or circular with breaks as in HBV), or Segmented • Polarity • Symmetry of NA • Envelope

  18. Nomenclature of viruses • Family: --- viridae (Adenoviridiae) • Subfamily --- Virinae (Adenovirinae) • Genera: --- virus (Adenovirus) • Serotype: --- Nnumber or letter

  19. DNA VIRUSES • Poxvirus: (Pox : pock or pustule) • Herpesvirus: (Herpes : creeping) • Adenovirus: (Adeno : gland) • Hepadnavirus: (Hepa : liver, dna: DNA) • Papovavirus: (Pa: papilloma, Po: polyoma, Va: vacuolating agent) • Parvovirus: (Parvus: small)

  20. RNA VIRUSES • Orthomyxovirus, paramyxovirus (Myxo: mucus) • Rhabdovirus: (Rhabdos: rod) • Picornavirus: (Pico: small, rna: RNA) • Togavirus: (Toga: cloak) • Flavivirus: (Flavi: yellow)

  21. Reovirus: (R: respiratory, E: enteric, O: orphan) Arenavirus: (Arena: sand) Retrovirus: (Re: reverse, TR: transcriptase) Calicivirus: (Calix: cup) Coronavirus: (Corona: Crown)

  22. Morphology of Viruses

More Related