In dermatology, we’ll take a look at those
that that are infectious in nature,
a lot of repetition here with
microbiology as well as you can imagine.
We’ll begin our topic by
looking at folliculitis
and I want to make sure that by the time
we’re completed with our discussion
that you’re quite clear as to what
does it mean to have a folliculitis,
and a furuncle, carbuncle, and
abscess, so on and so forth.
think of a follicular unit and that basically
is going to house your hair, right?
So think about the hair that’s
coming out of your skin
and it’s coming through
a follicular unit.
Infection of the hair follicles
is what folliculitis is.
Usually refers to
So that’s where you
want to go with this.
And its continuum of
If you think of it as
such from henceforth,
you’ll be in good shape.
So let’s say that you had an
infection of the follicular unit
and it wasn’t properly managed.
And at some point in time, you can
imagine that that infection is going to
get more severe.
And with the continuum,
it’s the furuncle, carbuncle, and
an abscess formation on the skin,
which could then also include
the follicular unit.
Are we clear about the big
picture of folliculitis?
And if you take a look at the
image that has been provided
and that I’m showing you folliculitis where
hair follicle unit has been infected.
The demographics can
occur at any age group.
It can involve terminal
and vellus hairs.
Almost all cases are
caused by Staph aureus.
That’s where your focus should be on.
Cases in the groin
may be caused by
what’s known as your
Gram-negative type of bacteria.
And degree of inflammation then
dictates the presentation.
A culture must be done so that you could
then look for your particular organism.
Management of folliculitis:
oral antibiotics such a
dicloxacillin or cephalexin.
Consider culture for those
that are non-responding.
And 25% occurrence in
all comers anyway.
Incision and drainage for
large fluctuant lesions.
So imagine that now that folliculitis
then goes on to become an abscess
and drainage is necessary.
Packing and marsupialization
So please do not choose this
as being an answer choice.
It will be a distraction when
it comes to be folliculitis.
If it’s acne vulgaris,
remember that this will be a condition
that’s taking place in your
pubertal age of
Usually on the face and upper trunk only
and the fact that have comedone
as being a feature of acne,
not of folliculitis.
In the folliculitis, you’re
focusing upon the hair unit.
Another differential diagnosis,
here it’s called prurigo nodule,
which is more or less a
neurodermatitic type of excoriation.
Not necessarily follicularly based
And the fact that it’s limited to
those areas that are reachable,
because here you’re thinking about this
being a neurodermatitic type of condition.
A differential diagnosis, also
known as your prickly heat.
And by that, we mean miliaria.
And with malaria, occlusion
of your eccrine sweat duct.
Not referring to malaria,
but this is miliaria.
Extravasation of sweat into
your dermis with inflammation.
And often in body folds and areas
in contact with the occlusion.