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Staphylococcus aureus pyomyositis compared with non-Staphylococcus aureus pyomyositis.
[pyomyositis]
Pyomyositis
is
an
acute
bacterial
infection
of
skeletal
muscle
not
arising
from
contiguous
infection
.
It
is
often
hematogenous
in
origin
and
typically
associated
with
abscess
formation
.
Our
objective
was
to
determine
if
there
were
any
differences
in
the
clinical
presentation
of
disease
between
Staphylococcus
aureus
(
SA
)
and
non-
Staphylococcus
aureus
pyomyositis
.
We
also
sought
to
determine
if
methicillin-resistant
SA
(
MRSA
)
occurred
more
frequently
during
the
final
years
of
the
study
period
.
A
retrospective
chart
review
study
at
three
institutions
in
two
cities
.
Sixty
cases
of
pyomyositis
were
identified
between
1990
and
2010
.
Twenty
-
nine
patients
were
infected
with
SA
while
31
had
other
bacterial
etiologies
or
were
culture
negative
.
Those
with
a
traumatic
event
prior
to
the
onset
of
infection
were
more
likely
to
have
a
SA
infection
while
SA
infected
patients
were
younger
.
Our
first
documented
case
of
MRSA
occurred
in
2005
,
but
the
frequency
of
MRSA
infection
remained
static
over
the
following
five
years
.
Pyomyositis
is
an
emerging
infection
that
is
underappreciated
by
many
physicians
.
While
MRSA
has
emerged
as
the
foremost
cause
of
SA
infections
in
a
majority
of
clinical
conditions
,
in
this
series
most
patients
still
had
methicillin-sensitive
SA
as
their
cause
of
pyomyositis
.
In
light
of
the
severity
of
pyomyositis
and
the
potential
for
bacteremia
(
either
as
a
source
or
complication
of
the
infection
)
,
empiric
SA
therapy
should
be
initiated
in
all
patients
until
the
culture
results
are
available
.
Diseases
Validation
Diseases presenting
"skeletal muscle"
symptom
cadasil
epidermolysis bullosa simplex
esophageal adenocarcinoma
focal myositis
hereditary cerebral hemorrhage with amyloidosis
inclusion body myositis
lamellar ichthyosis
neuralgic amyotrophy
pleomorphic liposarcoma
pyomyositis
pyruvate dehydrogenase deficiency
systemic capillary leak syndrome
well-differentiated liposarcoma
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