Investigating the effect of hydroalcoholic extract of red algae (Laurencia caspica) on growth performance, mucosal immunity, digestive enzyme activity and resistance to Streptococcus iniae and Aeromonas hydrophila in Nile tilapia (Oreochromis niloticus)
Aquaculture Reports,
Journal Year:
2024,
Volume and Issue:
35, P. 101984 - 101984
Published: Feb. 22, 2024
Immunostimulants,
including
seaweed,
can
play
a
significant
role
in
increasing
the
immune
response
and
preventing
occurrence
of
diseases
aquatic
animals.
These
stimulants
increase
fish's
disease
resistance
by
strengthening
nonspecific
system.
This
study
aimed
to
investigate
effects
red
macroalgae
extract
Laurencia
caspica
(Lc)
on
mucosal
immunity,
growth,
serum
biochemical
parameters,
mucus
bactericidal
activity,
digestive
enzymes,
against
S.
iniae
A.
hydrophila
Nile
tilapia.
Fish
with
an
average
weight
100
±
2
g
were
fed
Lc
algae
at
four
levels
(0,
0.5,
1
2%)
for
50
days.
The
gain
(WG),
food
conversion
ratio
(FCR),
specific
growth
rate
(SGR)
significantly
increased
compared
control
group
(P
<
0.05).
activity
was
no
effect
Streptococcus
(S.
iniae),
>
However,
it
Additionally,
there
Aeromonas
(A.
hydrophila)
not
amount
total
protein
(Tp),
albumin
(Alb),
globulin
(Glb),
cholesterol
(Chol)
0.05),
although
triglyceride
(TG)
2%
25th
day
had
Lysozyme
(except
0.5%
50th
day)
immunoglobulin
(Ig)
(in
all
groups)
enzymes
such
as
trypsin
α-amylase
days
Lipase
enzyme
extracts
groups
substantially
survival
fish
challenged
higher
than
0.0001).
Overall,
be
concluded
that
immunity.
Also,
induces
improve
tilapia
growth.
Language: Английский
Effects of Dietary Supplements Sargassum ilicifolium and Spirulina platensis on Growth Parameters, Immunity and Gene Expression in Juvenile Asian Seabass (Lates calcarifer)
Journal of Agriculture and Food Research,
Journal Year:
2025,
Volume and Issue:
19, P. 101689 - 101689
Published: Jan. 30, 2025
Language: Английский
The Effects of Laurencia caspica Algae Extract on Hemato-Immunological Parameters, Antioxidant Defense, and Resistance against Streptococcus agalactiae in Nile tilapia (Oreochromis niloticus)
Aquaculture Nutrition,
Journal Year:
2023,
Volume and Issue:
2023, P. 1 - 13
Published: July 4, 2023
Natural
immune
stimulants
are
among
the
most
effective
chemicals
for
boosting
immunity
and
fish
welfare.
This
study
aims
to
investigate
effects
of
red
macroalgae
extract
(Laurencia
caspica)
on
hematological,
immunological,
antioxidant,
biochemical,
disease
resistance
against
S.
agalactiae
in
Nile
tilapia
50
days.
For
this
purpose,
fishes
were
assigned
four
dietary
treatments
group
which
base
meal
was
supplemented
with
0.5%,
1%,
2%
L.
caspica
extract.
On
days
25
experiment,
samples
taken
antioxidant
parameters.
The
white
blood
cells
(WBCs),
hemoglobin,
neutrophils
significantly
increased
after
feeding
extract,
but
until
25th
day,
no
significant
difference
observed
except
hemoglobin.
Immunological
parameters
(including
Immunoglobulin
M
[IgM]
complement
3
[C3])
higher
treated
groups
compared
control
both
posttreatment.
However,
noticed
between
case
lysozyme
activity.
Alkaline
phosphatase
(ALP)
alanine
aminotransferase
(ALT)
considerably
comparison
50th
day.
In
addition,
enzyme
activities
day
(L.
1%
peroxidase
[POD]
superoxide
dismutase
[SOD]
all
groups)
(catalase
[CAT],
SOD
POD)
spleen.
survival
rate
challenged
Streptococcus
greater
than
group.
Finally,
it
can
be
concluded
that
is
an
immunological
stimulant
induces
agalactiae.
Language: Английский
Fucoidan derived from Sargassum ilicifolium affects growth and hemato-immunological parameters and antioxidant defense in Oscar (Astronotus ocellatus)
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: April 24, 2024
Fucoidan
(Fuc)
is
a
sulfated
polysaccharide
derived
from
brown
algae
and
has
various
biological
activities
such
as
immune
modulator,
growth
enhancer,
antioxidant
bactericidal.
However,
there
no
information
about
the
effect
of
fucoidan
on
ornamental
fish.
This
study
investigated
Sargassum
ilicifolium
parameters,
immunity,
biochemical,
antioxidant,
bactericidal
activity
serum
in
Oscar.
Fish
weighing
49.75
±
0.96
g
were
fed
S.
at
four
levels
(0%,
0.5%,
1%,
2%)
for
50
days.
After
days
feeding
with
fucoidan,
was
significant
increase
blood
parameters
except
WBCs
(Fuc
compared
to
control
group
(
p
<
0.05).
The
weight
gain
(WG),
feed
conversion
ratio
(FCR),
specific
rate
(SGR)
after
had
Serum
biochemical
total
protein
(Tp)
globulin
(Glb)
groups
0.05),
but
difference
observed
albumin
(Alb)
>
Antioxidant
serum,
SOD
CAT,
In
addition,
lysozyme
complement
containing
significantly
increased
A
NBT
against
Aeromonas
hydrophila
Fuc
2%
skin
carotenoids
1%
Overall,
it
can
be
concluded
that
parameters.
could
pigmentation,
enzyme
activity,
A.
.
Language: Английский
Immuno-protective response of Asian seabass (Lates calcarifer) to inactivated vaccines against Streptococcus iniae and Vibrio harveyi
BMC Veterinary Research,
Journal Year:
2024,
Volume and Issue:
20(1)
Published: March 8, 2024
Abstract
Background
In
this
study,
the
protective
immunity
and
immunogenicity
of
monovalent
bivalent
Streptococcus
iniae
Vibrio
harveyi
vaccine
were
evaluated
in
Asian
seabass.
To
analyze
immune
responses,
1200
seabass
with
an
average
weight
132.6
±
25.4
g
divided
into
eight
treatments
triplicates
(50
fish
per
tank)
as
follows:
S.
immunized
by
injection
(SI),
V.
(VI),
(SVI)
injection,
immersion
(SIM),
(VIM)
immersion,
harvei
(SVIM)
phosphate-buffered
saline
(PBS)
(PBSI)
control
group
without
administration
(CTRL).
Blood
serum
samples
taken
at
end
30th
60th
days.
Then
vaccinated
groups
challenged
two
bacteria
(
)
separately
mortality
was
recorded
for
14
Results
This
study
reveals
that
there
is
no
significant
difference
hematological
parameters
on
days
experiment
vaccine-immunized
compared
to
CTRL
P
>
0.05).
Meanwhile,
amount
albumin
level,
respiratory
burst
activity,
bactericidal
activity
Total
protein
day
(in
VI
SVI
groups),
globulin
groups)
group)
PBSI
had
a
increase
<
Complement
lysozyme
SI
increased
significantly
Serum
antibody
titer
against
SI,
VI,
SVIM
A
relative
percentage
survival
(RPS)
following
challenge
(86.6%),
(83.3%,)
(73.3%)
observed
(43.3%)
(40%)
Also,
RPS
after
group,
86.6%,
83.3%,
VIM
80%
76.6%
(46.6%)
(50%)
Conclusion
Overall,
results
demonstrated
harvey
able
produce
Language: Английский
Effects of artichoke (Cynara scolymus) polyphenolic extract on growth, antioxidants and some immune parameters in common carp (Cyprinus carpio)
BMC Veterinary Research,
Journal Year:
2025,
Volume and Issue:
21(1)
Published: March 17, 2025
In
this
research,
Cyprinus
carpio
juveniles
were
fed
with
experimental
diets
containing
different
levels
of
artichoke
polyphenolic
leaf
extract
(ALE)
0
(Control),
0.5,
1,
and
2
g/kg
over
eight
weeks.
After
weeks,
haemato-immunological
parameters,
growth
performance,
immune
parameters
antioxidant
defense
measured.
The
administration
varying
ALE
had
no
significant
effects
on
compared
to
the
control
group.
However,
haematological
significantly
elevated
Immune
such
as
serum
lysozyme,
mucus
total
immunoglobulin,
well
alternative
complement
activity
bactericidal
ALE-treated
carps,
showed
a
notable
increase
in
comparison
CTRL
Also,
agglutination
titer
carps
higher
than
Feeding
(0.5,
g/kg)
enhanced
activities
enzymes,
including
superoxide
dismutase
all
groups,
catalase
0.5
glutathione
peroxidase
1
results
study
demonstrate
that
dietary
supplementation
at
0.5–2
positively
influences
factors
carpio,
most
pronounced
observed
g/kg.
These
findings
suggest
extract,
particularly
dosages,
has
potential
an
effective
feed
additive
enhance
immunity
capacity
carp
farming.
Language: Английский
Current knowledge of lactococcosis in rainbow trout: Pathogenesis, immune response and prevention tools
Aquaculture,
Journal Year:
2023,
Volume and Issue:
580, P. 740363 - 740363
Published: Nov. 15, 2023
Lactococcosis
caused
by
Lactococcus
garvieae
has
emerged
as
one
of
the
most
devastating
bacterial
disease
affecting
rainbow
trout
(Oncorhynchus
mykiss)
worldwide.
Understanding
immune
response
to
this
streptococcal
pathogen
is
crucial
for
diagnosing
and
managing
associated
developing
vaccines
preventive
measures,
such
selection
naturally
resistant
stocks.
Over
past
few
decades,
a
significant
number
studies
have
focused
on
several
aspects
lactococcosis,
including
pathological
features,
responses
vaccination
protocols.
However,
disease's
geographical
distribution
its
spread
over
time,
routes
entry
dissemination
within
host's
body,
progression
infection,
subsequent
inflammatory
host
still
need
be
fully
explored.
This
review
describes
extant
knowledge
pathogenesis,
prevention
tools
lactococcosis
identify
areas
that
require
further
investigations
dedicated
studies.
Particular
emphasis
been
placed
describe
current
understanding
how
parameters
mechanisms
are
affected
in
when
they
exposed
natural
or
experimental
infections
undergo
treatments.
Ultimately,
more
comprehensive
interaction
between
L.
will
contribute
effective
strategies
aquaculture
settings.
Language: Английский
Immune response and protection efficacy of formalin‐killed vaccines against Streptococcus iniae in four‐finger threadfin Eleutheronema tetradactylum
Journal of Fish Diseases,
Journal Year:
2024,
Volume and Issue:
47(11)
Published: Aug. 29, 2024
Abstract
Four‐finger
threadfin,
Eleutheronema
tetradactylum
farming
in
southern
Taiwan
has
been
facing
disease
problems
caused
by
Streptococcus
iniae
since
2018.
The
development
of
a
vaccine
against
infectious
S
.
the
cultured
threadfin
industry
is
necessary.
Thus,
this
study
aimed
to
examine
efficacy
immunized
formalin‐killed
cells
(FKC)
from
GSI‐111
for
42
days
post‐vaccination
(dpv)
using
two
doses
FKC
alone
(a
booster
at
14
dpv)
as
group
A,
and
mixed
with
ISA763A
adjuvant
single
dose
B
or
double
C.
Immunoglobulin
(Ig)‐M
was
purified
rabbit
anti‐threadfin
IgM
polyclonal
antibodies
were
used
detect
antibody
level
fish;
vaccinated
A
displayed
higher
levels
3
dpv
all
treatments
demonstrated
high
between
dpv.
All
groups
showed
significantly
values
lysozyme
activity
compared
control
group;
peaked
expression
profiles
pro‐inflammatory
immune‐related
genes,
TNF‐α
,
IL‐12A
C2
upregulated
dpv,
while
CD8A
chemokine
receptor
CXCR4
Finally,
threadfins
challenged
average
relative
percent
survival
96%
vaccination
treatments,
100%
C
treatment.
In
summary,
that
vaccines
whether
formulated
an
could
stimulate
immune
response
effective
protect
infection.
Language: Английский