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[The hazards of hospitals and selected public buildings of Legionella pneumophila].
[legionellosis]
The
registered
infection
and
outbreaks
of
epidemic
tend
to
monitor
potential
reservoirs
of
Legionella
infection
.
According
to
the
Act
of
29
March
2007
on
the
requirements
for
the
quality
of
water
intended
for
human
consumption
are
required
to
test
for
the
presence
and
number
of
Legionella
in
the
water
system
of
hospitals
.
In
case
of
detection
of
L
.
pneumophila
serogroup
1
(
SG
1
)
or
increased
above
normal
number
other
serogroups
of
bacteria
it
is
necessary
to
eradicate
these
bacteria
from
the
water
system
.
The
aim
of
this
study
was
to
assess
the
degree
of
contamination
of
the
water
supply
system
of
selected
public
buildings
and
analyze
the
effectiveness
of
disinfection
methods
for
the
elimination
of
L
.
pneumophila
in
hot
water
systems
.
The
materials
for
this
study
were
hot
and
cold
water
samples
which
were
collected
from
the
water
supply
system
of
23
different
objects
.
Enumeration
of
Legionella
bacteria
in
water
samples
was
determined
by
membrane
filtration
(
FM
)
and
/
or
by
surface
inoculation
methods
according
to
the
standards
:
PN
-ISO
11731
:
2002
:
"
The
quality
of
the
water
.
Detection
and
enumeration
of
Legionella
"
and
PN
-EN
ISO
11731
-
2
:
2008
:
"
Water
quality--
Detection
and
enumeration
of
Legionella--
Part
2
:
Methodology
of
membrane
filtration
for
water
with
a
small
number
of
bacteria
"
.
L
.
pneumophila
was
present
in
164
samples
of
hot
water
,
which
accounted
for
76
.
99
%
.
In
all
tested
water
samples
L
.
pneumophila
SG
2
-
14
strains
were
detected
.
The
most
virulent
strain--
L
.
pneumophila
SG
1
was
not
detected
.
In
examined
23
objects
in
12
of
L
.
pneumophila
exceed
acceptable
levels
>
100
CFU
/
100
ml
.
The
presence
of
L
.
pneumophila
SG
2
-
14
demonstrated
in
all
examined
objects
,
indicating
the
risk
of
infection
,
and
the
need
for
permanent
monitoring
of
the
water
system
supply
.
The
thermal
disinfection
is
the
most
common
,
inexpensive
,
and
effective
method
of
control
of
L
.
pneumophila
used
in
examined
objects
,
but
does
not
eliminate
bacterial
biofilm
.
Disinfection
using
the
filters
stopped
of
L
.
pneumophila
,
and
was
the
method
of
complementary
thermal
disinfection
.
Chlorine
dioxide
is
a
very
effective
biocide
for
large
numbers
of
L
.
pneumophila
in
water
systems
.
