Certain
bacteria
are
pathogenic
to
plants
or
animals.
However,many
pathogens
attack
only
specific
hosts
and
sometimes
only
specific
loci
of
the
host.
Hence,
pathogenicity
tests
are
sometimes
used
for
the
identification
of
pathogenic
bacteria.
When
a
specific
toxin
is
involved
in
the
mechanism
of
pathogenicity,
animal
pathogenesis
tests
are
conducted
by
the
use
of
specific
neutralizing
antisera
so
as
to
identify
the
pathogenic
organism
with
a
high
degree
of
specificity.
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