Normal
Flora
of
Human -
There
are
many
microbes
in
ectosymbiotic
relationship
with
mammals.
Both,
skin
and
mucous
membranes
are
exposed
to
external
environment.
These
become
contaminated
at
different
stages
and
establish
a
normal
flora.
They
are
harmless
unless
under
certain
conditions.
The
throat
and
mouth
support
a
variety
of
microbes
including
most
of
the
eubacterial
groups.
Gram
positive
cocci
(micrococci,
pneumococci,
Streptococcus
salivarius)
are
common
throat
inhabitants.
There
are
also
Gram
negative
rods
of
genera
Bacteroides
and
Spirillum.
