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Dual exposure of Rickettsia typhi and Orientia tsutsugamushi in the field-collected Rattus rodents from Thailand.
[scrub typhus]
Field
-collected
rodents
and
fleas
from
ten
provinces
covering
four
regions
of
Thailand
were
investigated
for
possible
rickettsial
pathogen
infections
.
The
257
trapped-rodents
belonged
to
12
species
.
Five
species
of
Genus
Rattus
accounted
for
93
%
of
the
total
capture
,
of
which
Rattus
exulans
and
Rattus
norvegicus
were
the
two
major
species
caught
.
All
flea
specimens
,
removed
from
trapped
rodents
,
were
identified
as
Xenopsylla
cheopis
.
The
PCR
technique
was
performed
on
ectoparasite
specimens
to
detect
the
presence
of
murine
typhus
pathogen
(
Rickettsia
typhi
)
and
scrub
typhus
pathogen
(
Orientia
tsutsugamushi
)
.
Thirteen
flea
specimens
(
2
.
6
%
)
were
found
to
be
positive
for
R
.
typhi
but
none
for
O
.
tsutsugamushi
.
An
ELISA
technique
was
used
to
detect
the
rodent
's
antibodies
against
R
.
typhi
and
O
.
tsutsugamushi
.
Sixty
-
one
rodent
serum
samples
(
23
.
7
%
)
were
positive
for
R
.
typhi
specific
IgM
,
IgG
,
or
both
,
while
47
of
the
samples
(
18
.
3
%
)
were
positive
for
O
.
tsutsugamushi
.
Twenty
serum
samples
from
R
.
norvegicus
(
7
.
8
%
)
had
detectable
antibodies
against
both
R
.
typhi
and
O
.
tsutsugamushi
.
Our
findings
revealed
the
existence
of
the
dual
infection
of
rickettsial
pathogens
in
the
same
natural
hosts
.
Diseases
Validation
Diseases presenting
"same natural hosts"
symptom
scrub typhus
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