scholarly journals Impacts of Supplementing Broiler Diets with Biological Curcumin, Zinc Nanoparticles and Bacillus licheniformis on Growth, Carcass Traits, Blood Indices, Meat Quality and Cecal Microbial Load

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1878
Author(s):  
Mohamed E. Abd El-Hack ◽  
Bothaina A. Alaidaroos ◽  
Reem M. Farsi ◽  
Diaa E. Abou-Kassem ◽  
Mohamed T. El-Saadony ◽  
...  
Keyword(s):  
Meat Quality ◽  
Bacillus Licheniformis ◽  
Pathogenic Bacteria ◽  
Carcass Traits ◽  
The Body ◽  
Microbial Load ◽  
Oxidative Enzymes ◽  
Control Group ◽  
Zinc Nanoparticles ◽  
Blood Indices

The current study aimed to investigate the influence of dietary zinc nanoparticles (ZnNPs), curcumin nanoparticles (CurNPs), and Bacillus licheniformis (Bl) on the growth, carcass, blood metabolites, and the count of some cecal microorganisms of Indian River (IR) broilers. Chicks were allotted into seven experimental groups: control group, 1st, 2nd and 3rd groups were given diets enriched with ZnNPs, CurNPs and Bl (3.0, 5.0 and 2.0 cm3/kg diet, respectively). The 4th, 5th and 6th groups were given diets supplemented with ZnNPs (3.0) + Bl (2.0) (ZP); ZnNPs (3.0) + CurNPs (5.0) (ZC) and ZnNPs (3.0) + CurNPs (5.0) + Bl (2.0) (ZCP) cm3/kg diet, respectively. The results revealed that ZnNPs and CurNPs exhibited a considerable antimicrobial activity against pathogenic bacteria and fungi. They also inhibited the growth of microbes in a range of 50–95 µg/mL. The diet supplemented with ZnNPs, CurNPs, and Bl increased the body weight compared to the control after five weeks of age. Additionally, values of daily feed intake increased in these groups; however, the feed conversion ratio decreased. All values of carcass traits were better than that of the control. The treatments led to decreased abdominal lipids compared to the control. The activity of liver enzymes and malondialdehyde (MDA) activity decreased in the treated groups. In a converse trend, the levels of oxidative enzymes, amylase, protease, lipase and immunoglobulin were higher than that of the control. Meat quality properties were improved and cecal microbial counts were decreased. In conclusion, the ZnNPs, CurNPs, and Bl improved the broiler’s weights, carcass traits, meat quality traits, as well as some blood indices and cecal microbial load. Therefore, the inclusion of ZnNPs, CurNPs, or Bl is recommended for broiler feeding regimens to improve the performance and health status.

scholarly journals Effect of BioPlus YC Probiotic Supplementation on Gut Microbiota, Production Performance, Carcass and Meat Quality of Pigs

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1581
Author(s):  
Artur Rybarczyk ◽  
Elżbieta Bogusławska-Wąs ◽  
Alicja Dłubała
Keyword(s):  
Bacillus Subtilis ◽  
Meat Quality ◽  
Bacillus Licheniformis ◽  
Average Daily Gain ◽  
Production Performance ◽  
Probiotic Bacteria ◽  
Control Group ◽  
Production Traits ◽  
Feed Conversion

The objective of the study was to determine the effects of probiotic bacteria Bacillus licheniformis and Bacillus subtilis on microbiological properties of feed mixtures and on the digestive tract content as applicable to production traits and carcass characteristics of fatteners. The experiment was performed on 83,838 fatteners from four successive (insertions) productions in two groups. From the seventy eighth day of age till marketing to the slaughter plant, the pigs were supplied with BioPlus YC probiotic (Chr. Hansen) in the amount of 400 g/t. The preparation contained a complex of probiotic bacteria Bacillus licheniformis DSM 5749, and Bacillus subtilis DSM 5750 spores in a 1:1 ratio. From the fourth insertion, after reaching a body weight of approximately 112 kg, 60 fatteners were selected from each group to measure carcass quality and half of them for meat quality evaluation. Moreover, microbiological analyses in feed and colon were performed. The study showed that BioPlus YC probiotics supplementation resulted in a significantly higher count of B. subtilis and B. licheniformis in the feed, a higher count of B. subtilis, B. licheniformis and LAB, as well as a lower count of Enterobacteriaceae, Enterococcus, Clostridium and Bacillus sp. in the mucosa and in the colorectal content of the test pigs. Our work has shown that supplementation with the BioPlus YC probiotic had a positive effect on the production traits of pigs mainly by reducing mortality (2.83%, p = 0.010), lowering feed conversion ratio—FCR (2.59 kg/kg, p = 0.013), better average daily gain—ADG (0.95 kg/day, p = 0.002) and shorter fattening period (77.25 days, p = 0.019) when compared to the control group (4.19%; 2.79 kg/kg; 0.89 kg/day; 92.8 days, respectively). The addition of the specific Bacillus bacteria did not influence carcass and meat characteristics of the test fatteners.

Impact of dietary supplementation with a synbiotic, organic acids or their combination on growth performance, carcass traits, economic efficiency, jejunum histomorphometry and some blood indices of broiler chickens

2019 ◽  
Vol 59 (7) ◽  
pp. 1318 ◽  
Author(s):  
Ayman S. Salah ◽  
Mahmoud S. El-Tarabany ◽  
Mohamed A. Ali
Keyword(s):  
Organic Acids ◽  
Growth Performance ◽  
Carcass Traits ◽  
Dietary Supplementation ◽  
Control Group ◽  
Cost Ratio ◽  
Feed Conversion ◽  
Fat Percentage ◽  
Blood Indices ◽  
Blood Constituents

The objective was to explore the possible impacts of dietary supplementation with a synbiotic, organic acids or their combination on the growing efficiency, carcass traits and some blood constituents in broilers. In total, 160 1-day-old male broilers (Ross 308) were randomly assigned into four equal groups (40 birds with 8 replicates). The control group received the basal diet with no supplements, while diets of the treated groups were supplemented with organic acids (OA; 1 g/kg), a synbiotic (S; 1 g/kg) and an equal mix of OA and the synbiotic (OS; 2 g/kg). The dietary supplementation with OA decreased the feed intake (P = 0.011) and bodyweight gain (P = 0.011) when compared with other experimental groups. However, the dietary supplementation with the synbiotic plus OA resulted in a considerable improvement in the overall feed conversion rate when compared with the control and OA-supplemented groups (P = 0.001). Groups fed the diets supplemented with the synbiotic or the synbiotic plus OA showed significantly higher net profits and the profit to cost ratio than did the CON and OA-supplemented groups (P = 0.010 and 0.005 respectively). Birds in the S and OS groups had a significantly higher jejunum villus height (P = 0.001), and carcass (P = 0.012) and breast meat (P = 0.001) yields than did those in the control and OA groups. However, the synbiotic-supplemented group produced significantly lower abdominal fat percentage (P = 0.021). The dietary supplementation with the synbiotic or the synbiotic plus OA decreased the lymphocyte counts (P = 0.003) and the serum reduced glutathione concentration (P = 0.001), but significantly decreased the heterophil to lymphocyte ratio (P = 0.001), and the serum cholesterol (P = 0.014) and oxidised glutathione (P = 0.002) concentrations compared with the control and OA-supplemented groups. The present findings showed that dietary supplementation with a synbiotic or a synbiotic plus OA can improve the growth performance, carcass traits, serum antioxidant activity and blood-related indices in broilers.

scholarly journals PO-259 Effect of 30%，50% and 70% VO2 max treadmill exercises on gut microbiome in hypertensive mice

2018 ◽  
Vol 1 (5) ◽  
Author(s):  
Jin Li ◽  
Wenting Shi ◽  
Pengyi Zhang
Keyword(s):  
Blood Pressure ◽  
Aerobic Exercise ◽  
Gut Microbiome ◽  
Pathogenic Bacteria ◽  
Exercise Group ◽  
The Body ◽  
National Standard ◽  
Control Group ◽  
Beneficial Bacteria ◽  
Vo2 Max

Objective Gut microbiome has a significant impact on human health through the interaction with host and environment, which is closely related to a series of chronic diseases. The diversity of gut microbiome and its metabolic disorder are the risk factor of hypertension. The changes of gut microbiome structure and abundance are closely related to the pathogenesis of hypertension, in which Bifidobacterium and lactic acid bacteria can bind with the hypotensive substances to show the hypotensive therapy. However, the diet and exercise have great impact on the structure and function of gut microbiome, and of which aerobic exercise could increase the ratio of gut beneficial bacteria to harmful bacteria effectively. The effect of treadmill exercise on gut microbiome of hypertensive mice was studied in this paper, which provided a theoretical basis for the prevention and treatment of hypertension by gut microbiome. Methods SPF Kunming mice were fed with 8% high salt diet for 6 weeks to make the hypertension model. Compared with the blood pressure of mice before the formal experiment, The standard was that the blood pressure of the experimental mice was increased by SBP >15% or DBP > 5%, which was indicated the model of hypertension was established successfully. The motion slope and velocity of the maximum oxygen uptake of 30%, 50%, and 70% were measured respectively. The mice were divided into 4 groups randomly according to their body weight, 10 mice/group. The 30% VO2 max, 50% VO2 max, and 70% VO2 max were exercised for 6 weeks as well as the control group. The mice were divided into cages and fed in accordance with the national standard rodent diet. The blood pressure of mice was measured weekly by tail pressure method (Tail-cuff).The abundance of Bifidobacterium, Bacteroides, Lactobacillus and Enterobacter in the gut microbiome of mice feces were tested by 16S sequencing every two weeks. The ratio of Firmicute / Bacteroides (F/B ratio) was also measured by sequencing as a parameter to reflect the disorder of gut microbiome. The ratio of Firmicutes / Bacteroides is almost equal 1, and the present study found that the F/B increased significantly in the hypertensive group. Real-time PCR was used to detect the changes of plasma inflammatory factors IL-1β, IL-6 and TNF-ɑ. The previous study had shown that the intestinal disorders can lead to an increase in pathogenic bacteria, further leading to the inflammation. Finally, the experimental data were analyzed by independent sample t-test. Results (1) After six weeks of exercise intervention, the blood pressure (132.87mm Hg±5.23mm Hg) of the exercise group was significantly lower than the control group (99.57mm Hg±7.47mm Hg), especially in the 50%VO2 max mice. (2) Compared with the rest group, the abundance of gut microbiome in the exercise group was increased, among which the number of Bifidobacteria, Lactobacillus, and Bacteroides were increased significantly, of which 50% of VO2 max group increased most significantly, and the number of Enterobacter was less than the control group (p<0.05). (3) Compared with the control group, the ratio of F/B in the exercise groups were lower than the control group, but the 50% VO2 max group was decreased most obviously (p < 0.05). (4) Compared with the control group, the plasma levels of IL-1β, IL-6 and TNF-ɑ in exercise groups were significantly lower than the control group (p < 0.05). Conclusions  (1) The aerobic exercise could change the abundance and structure of gut microbiome in hypertensive mice, increase the beneficial bacteria Bifidobacteria and lactobacillus in the intestinal tract of mice, and reduce the ratio of Firmicutes/Bacteroides, improving the gut microbiome disorder. (2) The aerobic exercise could alleviate the inflammatory reaction of the body by regulating the structure of gut microbiome of hypertensive mice, improving the blood pressure of mice; (3) 50%VO2 max was the most significant exercise intensity to improve the abundance and structure of gut microbiome in hypertensive mice.  

scholarly journals Carcass Traits and Meat Quality of Fat-Tailed Lambs Fed Rosemary Residues as a Part of Concentrate

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 655
Author(s):  
Yathreb Yagoubi ◽  
Samir Smeti ◽  
Samia Ben Saïd ◽  
Houssem Srihi ◽  
Ilyes Mekki ◽  
...  
Keyword(s):  
Vitamin E ◽  
Meat Quality ◽  
Carcass Traits ◽  
Antioxidant Properties ◽  
Nitrogen Sources ◽  
Control Group ◽  
Antioxidant Power ◽  
Distillation Residues ◽  
By Products

Facing climate change implications on feeds unavailability, unconventional resources are being considered with a growing interest such as aromatic plant distillation residues with a two-fold object, enhancing meat quality by increasing the antioxidant properties and reducing feed prices which are often imported though expensive. Hence, this study aims to assess the effects of rosemary distillation residues (RR) incorporation in concentrate associated to two nitrogen sources as a substitute for standard concentrate on lamb’s growth, carcass traits and meat quality. For this, 24 Barbarine male lambs (3 months old, 17.83 ± 2.6 kg body weight) were divided into three groups. All lambs received individually 600 g of oat hay as roughage and 600 g of standard concentrate for control group, 600 g of concentrate based on RR and soybean meal for RRS group and 600 g of concentrate based on RR and faba bean for RRF group. After 65 days of experiment, all lambs were slaughtered. Phenolic and tocopherol intakes were significantly higher for both RR groups compared to control (p < 0.05). Growth, carcass weights, dressing percentages and non-carcass component weights were unaffected by the diet (p > 0.05). Moreover, regional and tissular compositions and meat physical properties were similar irrespective of the diet (p > 0.05). All color parameters were similar among groups (p > 0.05). However, meat produced by lambs receiving RR-based concentrate was richer on vitamin E and polyphenol contents than control lambs (p < 0.05). Rosemary by-products may substitute the standard concentrate resulting in similar lamb’s growth and carcass traits, while improving meat quality by increasing vitamin E content, which could improve its antioxidant power.

scholarly journals Green Coffea robusta (Coffea canephora) from Lampung province effect toward free radicals in chickens infected with Salmonella enteritidis bacteria

2021 ◽  
Vol 11 (1) ◽  
pp. 61-69
Author(s):  
Dahliatul Qosimah ◽  
Djalal Rosyidi ◽  
Lilik E. Radiati ◽  
Indah A. Amri ◽  
Dodik Prasetyo ◽  
...  
Keyword(s):  
Salmonella Enteritidis ◽  
Pathogenic Bacteria ◽  
Negative Control Group ◽  
Coffea Canephora ◽  
Positive Control ◽  
Negative Control ◽  
The Body ◽  
Control Group ◽  
High Dose ◽  
Treatment Groups

Background: Foodborne diseases are caused by acquired pathogenic bacteria such as Salmonella enteritidis. It causes an intestinal imbalance and the microbial toxins found in the gastrointestinal tract induce symptoms such as diarrhea. Coffee contains active ingredients such as antioxidants and is used as an anti-inflammatory agent by reducing pro-inflammatory cytokine levels in the body. Aim: The purpose of this study was to determine the interaction between Lampung’s robusta coffee and tissue damage in chickens infected by S. enteritidis. Methods: This study used first-day-old Isa brown layer chickens (n = 60), which were divided into five treatment groups. The negative control group consisted of healthy and normal chickens, whereas the positive control group consisted of chickens infected with S. enteritidis bacteria at a concentration of 108 CFU/ml. Groups T1, T2, and T3 were given coffee extract with doses of 500 mg/kg BW (low dose), 1,000 mg/kg BW (moderate dose), and 1,500 mg/kg BW (high dose), respectively, and then infected with S. enteritidis bacteria at a concentration of 108 CFU/ml. The coffee extract and bacteria were given orally via a feeding tube at a volume of 0.5 ml per chick. The extract was given for 14 days (from day 3 to day 16), and the bacteria were given on days 16 and 17. On day 18, the chickens were necropsied. The malondialdehyde (MDA) level was analyzed using one-way analysis of variance test with the GLM procedure (<0.05), while the tissue histopath was analyzed using a descriptive qualitative study to examine the ileal damage Results: The results showed that the MDA levels (nmol/l) decreased in treatment groups T1, T2, and T3 compared to the positive control. On the contrary, we found improvements in the ileum histopathology of group T1 and T2 in the form of normal and regular intestinal epithelium arrangement of the ileum, long intestinal villi, and decreased total leukocytes. Conclusion: Green coffee robusta has the potential to increase antioxidants and reduce inflammation in the small intestine of chickens infected with S. enteritidis.

scholarly journals Hydroxy Selenomethionine Improves Meat Quality through Optimal Skeletal Metabolism and Functions of Selenoproteins of Pigs under Chronic Heat Stress

Antioxidants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1558
Author(s):  
Yan Liu ◽  
Shenggang Yin ◽  
Jiayong Tang ◽  
Yonggang Liu ◽  
Gang Jia ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Heat Stress ◽  
Growth Performance ◽  
Meat Quality ◽  
Carcass Traits ◽  
Basal Diet ◽  
Growing Pigs ◽  
Control Group ◽  
Encoding Genes

Chronic heat stress (CHS) induces metabolic changes in skeletal muscle from growth to maintenance that jeopardizes growth performance, carcass traits, and meat quality of pigs. We investigated the protective effect of dietary organic selenium (hydroxy-4-methylselenobutanoic acid, OH-SeMet) on CHS-induced skeletal muscle damages of growing pigs, and the corresponding responses of selenoproteins. A total of 40 ((Landrace × Yorkshire) × Duroc) pigs with an average live weight of 49.64 ± 2.48 kg were used in this 4-week trial. Pigs were randomly allotted to 5 groups: The control group was raised on a basal diet in a thermoneutral environment (22 ± 2 °C); and four CHS groups were raised on a basal diet and supplemented with Se 0.0, 0.2, 0.4, and 0.6 mg/kg as OH-SeMet, respectively, in hyperthermal condition (33 ± 2 °C). CHS resulted in significant decrease of growth performance, carcass traits, and meat quality, which were associated with reduced (p < 0.05) serum alkaline phosphatase (ALP) and total superoxide dismutase (T-SOD) and increased (p < 0.05) serum creatine (CK), sarcous heat shock protein 70 (HSP70), glucokinase (GCK), phosphoenolpyruvate carboxykinase (PEPCK), and malondialdehyde (MDA) contents. Meanwhile, four metabolism-related genes and seven selenoprotein encoding genes were abnormally expressed in skeletal muscle. Dietary OH-SeMet addition partially alleviated the negative impact of CHS on carcass traits and improved meat quality. These improvements were accompanied by the increase in Se deposition, the anti-oxidative capacity of serum and muscle, and protein abundance of GPX1, GPX3, GPX4, and SELENOP. Supplementation with 0.6 mg Se/kg (OH-SeMet) restored the sarcous PEPCK, and 0.4 and 0.6 mg Se/kg (OH-SeMet) restored all abnormally expressed metabolism-related and selenoprotein encoding genes. In summary, dietary supplementation with OH-SeMet beyond Se requirement mitigated CHS-induced depression of carcass traits and meat quality of pigs associated with optimal skeletal metabolism, enhanced antioxidant capacity, and regulation of selenoproteins in skeletal muscle of pigs.

scholarly journals The influence of selenium additives in compound feed on the chemical composition, energy and biological value of ducklings meat

2021 ◽  
Vol 23 (94) ◽  
pp. 3-8
Author(s):  
O. I. Sobolev ◽  
S. V. Sliusarenko ◽  
A. O. Sliusarenko ◽  
R. А. Petryshak ◽  
I. P. Golodyuk ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Egg Production ◽  
The Body ◽  
Farm Animals ◽  
Control Group ◽  
Biological Value ◽  
The Third ◽  
Economic Experiment ◽  
Positive Effect

According to modern classification of trace elements, which is based on their biological significance for living organisms, selenium is classified as a group of vital or biogenic elements. As a biotic element, it has unique physico-chemical and biochemical properties and, with adequate intake into the body of farm animals and poultry has a positive effect on a number of physiological processes. The discovery of biological properties of selenium became the basis for its use first in the prevention and treatment of many diseases associated with a deficiency of this trace element, and later – as a stimulator of growth and development of young animals, as well as in order to increase egg production, poultry safety, improve the incubation characteristics of eggs and several other productive qualities. Scientists who have studied the effects of selenium on poultry have paid relatively little attention to meat quality. The effect of additives of different selenium doses in compound feed on the chemical composition, energy and biological value of Ukrainian white breed ducklings’ meat was studied in the scientific and economic experiment. Four groups of ducklings with 100 heads in each groups were formed to conduct the scientific and economic experiment. The duration of the experiment was 56 days and corresponded to the period of raising ducklings for meat. The ducklings of the first control group did not receive selenium supplementation. Selenium was additionally introduced into compound feed for poultry of the experimental groups in the following amount, mg/kg: the second group – 0.2; the third – 0.4 and the fourth – 0.6. It was established that the introduction of selenium into compound feed in the studied dose did not significantly affect to the quality of ducklings’ meat, although it had a positive effect on some indicators that characterize its chemical composition, nutritional and biological value. Among the experimental groups, ducklings of the third and fourth groups, which were injected with selenium into compound feed at the rate of 0.4 and 0.6 mg/kg, stood out in terms of meat quality.

Effect of Vasectomy and / or Adding Cuminum cyminum Seeds in the diet of Awassi Ram Lambs on their Carcasses Traits

2014 ◽  
Vol 38 (2) ◽  
pp. 79-86
Author(s):  
Tamara N. Dawood
Keyword(s):  
Body Weight ◽  
Carcass Traits ◽  
Feed Additives ◽  
The Body ◽  
Farm Animals ◽  
Control Group ◽  
Muscle Area ◽  
Eye Muscle ◽  
The Third ◽  
Ram Lambs

     This experiment was carried out at Animal Farm, College of Veterinary Medicine, Baghdad University, from Mar. up to Sept. 2010. Twenty eight Awassi ram lambs of 4-5 months old were equally divided into four groups of similar body weight and fed 2% of concentrate diet of body weight with grazing for 3-4 hours a day. The first group (C) and the third group (V) were fed concentrate diet free of cumin seeds; while the second group (CU) and the fourth group (CV) were fed the same amount of concentrate diet contain 3% of cumin seeds. All animals were grazed daily for 3-4 hours as one group. The third and the fourth groups were vasectomized by close vasectomy operation at the beginning of the experiment.  The results revealed that cumin seeds used as feed additives for Awassi ram lambs caused significant (P<0.05) increase in live animal body weight, fasting and empty body weight, hot and cold carcass weights also it had an effect on carcass measurements, empty digestive and stomach weight, most carcass joints weight, rib eye muscle area, Longismus dorsi weight, lean and fat weight in the rack joint compare with the control group. However vasectomy had significant (P<0.05) increase in the body weight, fasting, empty and hot and cold carcass weight, the weight of pelt, full and empty digestive system, most of joint weights, fat tail, fat weight of the rack joint, while the 4th group showed higher values than the most carcass traits compared with the 2nd and 3rd groups and significantly (P<0.05) higher than the control group (1st group). It is concluded that vasectomy and cumin seeds have positive effect on lamb performance and carcass traits. Cumin seeds can be used as effective and cheep feed additives. Further studied are required to prove the suitable ratio of cumin seeds addition alongside with castration in other farm animals.

scholarly journals 276 Effects of Hermetia illucens larvae meal on growth performance, carcass traits, and meat quality in finishing pigs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 105-106
Author(s):  
Xianyong Ma ◽  
Miao Yu ◽  
Zhenming Li ◽  
Dun Deng ◽  
Ting Rong
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Fatty Acid Synthase ◽  
Carcass Traits ◽  
Control Group ◽  
Finishing Pigs ◽  
Microbial Composition ◽  
Hermetia Illucens ◽  
Hermetia Illucens Larvae

Abstract Object: This study aimed to investigate the effects of Hermetia illucens larvae meal on growth performance, carcass traits, and meat quality of finishing pigs. Methods: Seventy-two crossbred (Duroc × Landrace × Large White) pigs (76.0 ± 0.52 kg) were randomly allocated to three experimental treatments, and fed the diet with supplementation of 0%, 4%, or 8% Hermetia illucens larvae meal (HILM), respectively. The experiment lasted 42 days. Results: The average daily gain (ADG) of pigs in 4% HILM group was higher, and the feed gain ratio (F/G) was lower than the control and 8% HILM group (P &lt; 0.05). The loin-eye area, marbling scores, and inosine monophosphate (IMP) content of Longissimus thoracis muscle (LM) in 4% and 8% HILM group were higher than the control group (P &lt; 0.05). There were no diffenences on backfat thickness, pH value, meat color, drip loss among three groups. Compared with the control, 4% HILM significantly increased the content of intramuscular fat (IMF) (P &lt; 0.05). Meanwhile, the mRNA expression level of fatty acid synthase (FAS), acetyl CoA carboxylase α (ACCα), lipoprotein lipase (LPL), and MyHC-IIa in the LM was higher in 4% HILM group than that in 8% Hermetia illucens larvae meal and the control group (P &lt; 0.05). The abundance of Lactobacillus, Pseudobutyrivibrio, Roseburia, Oribacterium, and Faecalibacterium was higher in 4% Hermetia illucens larvae meal group than the control group (P &lt; 0.05); The abundance of Streptococcus was lower and Peptococcus was higher in 4% HILM group than 8% HILM group. Conclusion: HILM can be used as an effective feed ingredient in finishing pig’ diet up to 4% level, which was beneficial for the growth performance, carcass trait, and meat quality of pigs, and the underlying mechanism maybe due to the altered lipogenic potential, myofiber characteristics and the microbial composition regulated by HILM.

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