Virus
Occurence - The occurrence of viruses in the cells of bacteria and higher plant and animals is well established.
Plant viruses
Most
plant
viruses
have
been
found
in
angiosperms
(flowering
plants).
Relatively
few
viruses
are
known
in
gymnosperms,
ferns,
fungi
or
algae.
Plant viruses are of great economic Importance, since they cause plant diseases in a variety of crops.
Animal viruses
Virus
diseases
are
known
in
a
variety
of
vertebrates,
including
fish,
amphibia,
birds
and
mammals.
Important
virus
diseases
of
humans
include
poliomyelitis,
smallpox,
rabies,
mumps,
measles,
yellow
fever,
influenza
and
encephalitis.
Index >> Virus Structure and Classification >> Virus Occurence
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