Viruses
19.7-19.10




16.7-16.10
Rhinovirus



http://en.wikipedia.org/
wiki/Rhinovirus
10 genes
spread by runny nose
elicits strong
immune response
http://www.virology.wisc.edu/
virusworld/viruslist.php?virus=r16
Influenza
10 genes
birds carry human and
nonhuman strains
spread by runny nose,
cough and...
Bacteriophage
infect bacteria
spread by lysing bacteria
Felix d’Herelle
Viral Replication
Attachment
Penetration
Uncoating
Replication
Assembly
Release
Example of a DNA virus
RNA viruses
genome consists of RNA
genome copied by
RNA-dependent
RNA polymerase
RdRP is error-prone
producing mutations
that may lead to new
strains
Polio Virus
Retroviruses
genome consists of RNA
RNA turned into DNA
by reverse transcriptase
DNA integrated
into host’s DNA
by integrase
Viral Diseases
Vectors
disease-bearing organisms
Reassortment
when hosts infected with
multiple strains combine
genes from those strains
to produce a new strain
Viruses

Viruses