Viral Infections

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a minute particle that is capable of replication but
only within living cells
virus
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does not possess metabolic
organelles
simple micro-organism
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basic viral structure = nucleic acid protected by
protein shell the capsid
viron
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one infected individual to an
uninfected individual: aerosols of respiratory
fluids, contact infected blood, sexual contact
transmission
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infection which is transmitted via animals
zoonotic transmission
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infection transmitted via mosquitoes, flies, ticks
vector-borne disease
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common cold, "cold sores" (herpes simple virus), COVID-19, HIV
most common viral infections
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viruses hide
within cells & away from normal
inflammatory or immune responses
intracellular survival
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producing large numbers
of virons more quickly than immune
system can develop
rapid division
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primary defense mechanisms against viruses
antibodies
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alteration of ‘identity’
classic example = flu
antigenic variation
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1. Attachment to target cell
2. Penetration
3. Uncoating (release of viral nucleic
acid)
4. Replication
5. Assembly (formation new virons)
6. Release
viral life cycle
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Other cards in this set

Card 2

Front

simple micro-organism

Back

does not possess metabolic
organelles

Card 3

Front

viron

Back

Preview of the back of card 3

Card 4

Front

transmission

Back

Preview of the back of card 4

Card 5

Front

zoonotic transmission

Back

Preview of the back of card 5
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