4.7 Viruses : The Enemy Within

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Presentation transcript:

4.7 Viruses : The Enemy Within By: Steffany Copeland

Viruses are life mimicking particles Latin word for poison Viruses are nonliving Viruses cannot reproduce by themselves Viral genomes can be single or double stranded Viruses range from .027mm-0.03mm Obligate intracellular parasites The entire infectious virus particle as a whole- virion

Viruses hosts Bacteria Animals Humans Plants Fungus Insects

Viral Structure Nucleic acid Protein coat or capsid Envelope Tail Tail fibers End plate

Lytic viral growth cycle of Bacteriophage Adsorption Penetration Replication Assembly Release

Lytic replication cycle of rabies virus, an enveloped virus with a single-stranded RNA genome

Virions of enveloped viruses are released by budding from an infected virus

Rabies virus can be deadly Rabies virus travels slowly to the CNS where it replicates and then travels to the salivary glands where it replicates again There are 2 types of rabies: Furious Rabies and Dumb Rabies

The End ? Questions ?

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