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Investigation of Class I Integron in Salmonella infantis and Its Association With Drug Resistance.
[typhoid]
Infection
with
non-
typhoid
Salmonella
(
NTS
)
is
one
of
the
most
important
health
problems
all
over
the
world
.
Antimicrobial
drug
resistance
is
increasing
among
Salmonella
infantis
species
.
The
aim
of
this
study
was
to
investigate
the
frequency
of
presence
of
class
1
integrons
in
S
.
infantis
species
as
well
as
its
association
with
drug
resistance
.
This
cross-sectional
study
was
performed
on
50
S
.
infantis
isolated
strains
,
collected
from
chicken
samples
between
2009
-
2011
.
These
strains
were
identified
by
standard
biochemical
tests
and
serology
.
Antibiotic
susceptibility
profiles
and
minimum
inhibitory
concentration
determination
for
14
antibacterial
agents
were
performed
using
micro
dilution
and
disk
diffusion
methods
.
The
detection
of
class
1
integron
was
performed
by
the
PCR
method
.
The
demographic
and
microbiological
data
for
the
integron
positive
and
negative
isolates
were
compared
by
SPSS
software
.
Eighteen
out
of
50
(
36
%
)
of
isolated
S
.
infantis
species
had
intl
gene
.
The
isolated
bacteria
were
sensitive
to
cefotaxime
and
ciprofloxacin
(
100
%
)
.
Also
isolates
were
resistant
to
nalidixic
acid
,
tetracycline
and
streptomycin
.
All
isolate
with
class
1
integron
were
multidrug
resistant
.
The
result
of
this
study
showed
that
due
to
increased
level
of
drug
resistance
in
S
.
infantis
and
the
presence
of
class
1
integron
in
these
strains
,
resistance
can
be
transferred
to
other
food
borne
pathogens
.
