Russian Journal of Infection and Immunity,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 13, 2024
Bacteria
of
the
genus
Listeria
are
widely
distributed
in
environment;
they
isolated
from
soil
and
water
ecosystems,
food
products,
environmental
objects,
circulate
vivo.
L.monocytogenes
pathogenic
for
animals
humans.
The
ecological
plasticity,
stress
resistance
tolerance
determines
their
ability
to
switch
a
saprophytic
parasitic
life
cycle
survive
under
various
conditions.
After
thawing
subsequent
cultivation
on
fresh
nutrient
medium,
pronounced
populational
heteromorphism
is
noted:
formation
protoplast-type
cells,
L-forms
convoluted
revertant
which
requires
use
PCR
ELISA
bacteria
detection.
It
known
that
non-pathogenic
Listeria,
as
well
microorganisms
forming
biocenosis
with
L.monocytogenes,
can
serve
reservoir
pathogenicity
determinants
be
transferred
by
horizontal
transfer,
leads
emergence
new,
more
virulent
antibiotic-resistant
strains.
In
addition,
most
important
adaptation
mechanism
adverse
factors
form
biofilms
markedly
enhancing
survival
disinfectant
resistance.
relatively
high
genomic
similarity
between
some
species
often
coexistence
similar
niches,
may
provide
an
opportunity
transfer
or
virulence
genes.
At
same
time,
transmission
genes
L.innocua
also
possible,
predetermines
appearance
atypical
hemolytic
strains,
which,
given
greater
prevalence
latter
pose
great
danger
humans
animals.
increasing
role
pattern
human
animal
infectious
pathologies,
variability
morphological,
cultivable
biochemical
properties,
constant
modification
surface
antigens
underlies
need
improve
listeriosis
diagnostics
creation
new
immunobiological
preparations
modern
regimens
isolation
identification
types.
This
review
discusses
current
views
spp.
biological
qualities,
methods
identifying
different
species.
Microorganisms,
Journal Year:
2024,
Volume and Issue:
12(4), P. 817 - 817
Published: April 18, 2024
Listeria
monocytogenes
is
a
ubiquitous
pathogen
found
both
in
the
environment
and
food.
It
can
cause
listeriosis
wide
range
of
animals
as
well
humans.
Investigations
on
presence,
spread
virulence
are
still
limited
to
terrestrial
human
environments.
Embracing
One
Health
Approach,
investigating
presence
L.
marine
ecosystems
among
wildlife,
would
provide
us
with
useful
information
for
health.
This
study
investigated
spp.
two
species
sea
turtles
common
Mediterranean
Sea
(Caretta
caretta
Chelonia
mydas).
A
total
one
hundred
sixty-four
carcasses
(C.
n
=
161
C.
mydas
3)
stranded
along
Abruzzo,
Molise,
Campania,
Calabria
coasts,
were
collected.
Brain
fecal
samples
taken,
enriched,
cultured
detection
From
specimens
collected,
strains
(brain
1,
brain
feces
multiorgan
1
1),
innocua
(feces
ivanovii
1)
isolated.
Typical
colonies
isolated
Whole
Genome
Sequencing
(WGS).
Virulence
genes,
disinfectants/metal
resistance,
antimicrobial
resistance
also
investigated.
monocytogenes,
innocua,
detected
caretta,
whilst
only
mydas.
Notable
results
lack
significant
differences
gene
distribution
between
turtle
strains.
Furthermore,
potentially
pathogenic
turtles.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 13, 2024
Abstract
In
Uruguay
and
other
countries
of
southern
South
America,
listeriosis
in
cattle
has
been
described,
often
relying
solely
on
histological
lesions
for
diagnosis.
This
study
aimed
to:
i)
analyze
a
case-series
bovine
diagnosed
through
combined
pathological
bacteriological
methods
and,
ii)
characterize
the
isolated
Listeria
strains.
From
2014
to
2022,
twelve
cases
were
diagnosed.
Eleven
presented
as
neurolisteriosis,
while
one
involved
third-trimester
abortion.
These
events
primarily
occurred
spring
(9
cases)
winter
(3),
affecting
individual
adult
(>
2
years
old)
both
beef
dairy
farms.
Interestingly,
5/12
(42%)
had
no
prior
history
silage
feeding.
Histopathological
examination
neurolisteriosis
revealed
suppurative
meningoencephalitis
with
brainstem
microabscesses.
The
aborted
fetus
hepatitis
necrosuppurative
nephritis.
was
from
11/12
cases:
8
L.
monocytogenes
3
non-hemolytic
innocua.
identified
serotypes
4b
(n
=
6)
1/2a
2),
which
are
commonly
reported
humans
animals
worldwide.
Importantly,
all
isolates
possessed
inlA
gene,
key
virulence
factor,
none
innocua
did.
highlights
importance
isolation
characterizing
circulating
strains
gaining
deeper
insights
into
agent
epidemiology
ruminants
America.
Journal of Veterinary Diagnostic Investigation,
Journal Year:
2024,
Volume and Issue:
36(6), P. 896 - 901
Published: Aug. 17, 2024
Neurolisteriosis,
a
common
disease
of
small
ruminants,
is
most
often
caused
by
Listeria
monocytogenes.
Here
we
describe
25
cases
caprine
neurolisteriosis
diagnosed
in
our
laboratory
over
5-y
period
and
compare
fluorescent
antibody
test
(FAT)
results
with
immunohistochemistry
(IHC)
polymerase
chain
reaction
(PCR)
testing
for
diagnostic
confirmation.
Neurohistologic
changes
consistent
affected
the
pons
all
cases,
extending
rostrally
to
mesencephalon
6
caudally
medulla
oblongata
and/or
dorsally
cerebellum
4
cases.
Acute
inflammatory
were
observed
17
included
neuroparenchymal
microabscesses,
neuronal
necrosis
neuronophagia,
axonal
swelling,
microgliosis
astrogliosis,
perivascular
neutrophils
macrophages,
lymphocytes,
plasma
cells
that
occasionally
extended
leptomeninges.
Subacute-to-chronic
(8
cases)
consisted
clusters
macrophages
rare
neutrophils,
admixed
glial
nodules.
Bacterial
bacilli
within
or
H&E-stained
tissue
sections
Gram
stain
highlighted
gram-positive
13
Neurolisteriosis
was
confirmed
FAT
2
IHC
19
PCR
20
Russian Journal of Infection and Immunity,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 13, 2024
Bacteria
of
the
genus
Listeria
are
widely
distributed
in
environment;
they
isolated
from
soil
and
water
ecosystems,
food
products,
environmental
objects,
circulate
vivo.
L.monocytogenes
pathogenic
for
animals
humans.
The
ecological
plasticity,
stress
resistance
tolerance
determines
their
ability
to
switch
a
saprophytic
parasitic
life
cycle
survive
under
various
conditions.
After
thawing
subsequent
cultivation
on
fresh
nutrient
medium,
pronounced
populational
heteromorphism
is
noted:
formation
protoplast-type
cells,
L-forms
convoluted
revertant
which
requires
use
PCR
ELISA
bacteria
detection.
It
known
that
non-pathogenic
Listeria,
as
well
microorganisms
forming
biocenosis
with
L.monocytogenes,
can
serve
reservoir
pathogenicity
determinants
be
transferred
by
horizontal
transfer,
leads
emergence
new,
more
virulent
antibiotic-resistant
strains.
In
addition,
most
important
adaptation
mechanism
adverse
factors
form
biofilms
markedly
enhancing
survival
disinfectant
resistance.
relatively
high
genomic
similarity
between
some
species
often
coexistence
similar
niches,
may
provide
an
opportunity
transfer
or
virulence
genes.
At
same
time,
transmission
genes
L.innocua
also
possible,
predetermines
appearance
atypical
hemolytic
strains,
which,
given
greater
prevalence
latter
pose
great
danger
humans
animals.
increasing
role
pattern
human
animal
infectious
pathologies,
variability
morphological,
cultivable
biochemical
properties,
constant
modification
surface
antigens
underlies
need
improve
listeriosis
diagnostics
creation
new
immunobiological
preparations
modern
regimens
isolation
identification
types.
This
review
discusses
current
views
spp.
biological
qualities,
methods
identifying
different
species.
