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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
"abscess formation"
symptom
papillon-lefèvre syndrome
pyomyositis
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