Type
I
Anaphylactic
Hypersensitivity
This type
may
be
life-threatening.
It
is
characterised
by
anaphylaxis,
a
series
of
events
in
which
mediators
induce
vigorous
contractions
in
the
body's
smooth
muscles.
This
type
begins
with
the
entry
of
an
antigenic
substance,
the
allergen,
into
the
body.
A
wide
variety
of
substances
as
bee
venom,
serum
proteins,
or
drugs
as
penicillin
may
act
as
allergens.
In
case
of
penicillin,
an
allergenic
complex
forms
between
tissue
proteins
and
a
product
of
the
drug's
breakdown.
Index >>Immunity >> Type I Anaphylactic Hypersensitivity
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