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| | ===Overview=== | | ===Overview=== |
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| − | *Systemic infections - controlled by live monotypic vaccination | + | *Systemic infections - controlled by '''live monotypic vaccination''' |
| − | *Respiratory infections - not controled by live monotypic vaccinations | + | *Respiratory infections - ''not'' controled by '''live monotypic vaccinations''' |
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| | ===Classification=== | | ===Classification=== |
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| | ===Virus properties=== | | ===Virus properties=== |
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| | + | ====Structure==== |
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| | + | *Negative sense '''RNA''', unsegmented, single stranded |
| | + | **-> '''Reasortment''' and '''antigenic shift''' cannot occur |
| | + | *'''HN spike''' contains: |
| | + | **'''Haemagglutinin (H)'''- attachment protein |
| | + | **'''Neuraminidase (N)''' |
| | + | *'''Fusion''' glycoprotein (F) spike |
| | + | **-> Viral lipid bilayer can fuse directly with host plasma membrane |
| | + | ***-> RNA released into cytoplasm |
| | + | **->Syncytium (multinucleated giant cells) in lesions and cell culture |
| | + | **Host antibody response to this protein is most important |
| | + | ***Best induced by '''live attenuated vaccines''' |
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