Virus Structure And Transmission Flashcards
What are the 4 components of most viruses
Viral genome
Capsid
Envelope (lipid bilayer)
Surface proteins/spike
Which part of the virus components aren’t present in all viruses
Lipid bilayer envelope
What are viruses called because they only grow inside host cells
Obligate intracellular parasites
What is a virion
A virus particle
What makes up the capsid
Capsomere proteins
What does a true virus contain many copies of
Nucleic acid and proteins eg capsomeres
What is a nucleocapsid
Genome encased inside capsid
Which virus is the smallest
Polio
What is the largest virus
Pox
What are the 5 types of virus forms
Naked icosahedral
Naked helical
Enveloped icosahedral
Enveloped helical
Complex virus
What do naked icosahedrals and naked helicals not have
Envelope
How are viruses classified
Via size and shape
Via their infection site
Baltimore (how genome produces mrna and replicates)
Name the 3 modes of transmission between organisms
Horizontal (person to person)
Vertical (mother to child)
Zoonotic (animal to human)
Which 5 routes can horizontal transmission occur
Oral - faecal
Respiratory (inhalation)
Sexual transmission
Urine
Mechanical (blood products)
How does respiratory horizontal transmission occur
Droplets can be inhaled or transmitted from surfaces into eyes, mouth and nose