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Role of Brevundimonas vesicularis in supporting the growth of Legionella in nutrient-poor environments.
[legionellosis]
In
1986
,
we
encountered
the
first
case
of
Legionella
micdadei
pneumonia
in
Japan
.
In
the
follow-up
study
to
determine
the
infection
route
of
L
.
micdadei
,
we
isolated
Brevundimonas
vesicularis
from
the
shower
hose
of
the
patient
�
s
home
.
This
motivated
us
to
explore
the
symbiosis
between
B
.
vesicularis
and
Legionella
in
this
study
.
B
.
vesicularis
type
strain
,
B
.
vesicularis
Kobe
strain
,
Legionella
pneumophila
serogroup
1
type
strain
,
and
L
.
micdadei
Kobe
strain
were
used
.
B
.
vesicularis
was
inoculated
into
0
.
01
M
phosphate
buffer
solution
containing
artificial
sand
,
and
varying
concentrations
of
glucose
at
0
.
1
%
,
0
.
01
%
,
and
0
.
001
%
.
Legionella
was
added
to
the
cultures
after
ten
days
of
incubation
,
and
Legionella
viable
counts
were
monitored
over
time
.
After
three
days
of
incubation
,
Legionella
counts
increased
approximately
twofold
in
flasks
containing
0
.
001
%
glucose
,
but
Legionella
counts
decreased
in
both
B
.
vesicularis
inoculated
and
non-inoculated
flasks
containing
higher
concentrations
of
glucose
.
The
counts
were
significantly
higher
in
flasks
inoculated
with
B
.
vesicularis
than
in
non-inoculated
flasks
throughout
the
experiments
.
Under
the
nutrient-
poor
conditions
,
the
presence
of
B
.
vesicularis
was
found
to
aid
a
further
increase
in
Legionella
counts
.
Further
research
is
necessary
to
understand
the
symbiotic
conditions
most
supporting
the
growth
of
L
.
micdadei
.
Diseases
Validation
Diseases presenting
"pneumonia"
symptom
22q11.2 deletion syndrome
acute rheumatic fever
allergic bronchopulmonary aspergillosis
alpha-thalassemia
classical phenylketonuria
cohen syndrome
congenital diaphragmatic hernia
heparin-induced thrombocytopenia
hydrocephalus with stenosis of the aqueduct of sylvius
junctional epidermolysis bullosa
lamellar ichthyosis
legionellosis
liposarcoma
lymphangioleiomyomatosis
monosomy 21
oculocutaneous albinism
omenn syndrome
pleomorphic liposarcoma
primary effusion lymphoma
proteus syndrome
pyomyositis
scrub typhus
severe combined immunodeficiency
triple a syndrome
waldenström macroglobulinemia
wiskott-aldrich syndrome
x-linked adrenoleukodystrophy
zellweger syndrome
This symptom has already been validated