Tissue
Penetration
Most
information
on
this
aspect
is
based
on
studies
on
histological
preparations,
tissue
cultures
and
animals.
Understanding
of
the
penetration
process
of
tissues
is
not
complete.
Once
penetration
has
occurred,
the
parasites
compete
with
the
host
cells
for
nutrients
and
minerals.
The
ability
of
a
parasite
to
penetrate
tissues
and
cause
structural
damage
is
invasiveness
