British Poultry Science最新文献

筛选
英文 中文
Stress-induced alterations in leukocyte profile and serum biochemical parameters in broilers. 应激诱导的肉鸡白细胞谱和血清生化参数的改变。
IF 1.7 3区 农林科学
British Poultry Science Pub Date : 2025-08-13 DOI: 10.1080/00071668.2025.2541362
M A Miah, M I Haque, M H Zannat, M H Ullah, K M Sujan, A Mustari
{"title":"Stress-induced alterations in leukocyte profile and serum biochemical parameters in broilers.","authors":"M A Miah, M I Haque, M H Zannat, M H Ullah, K M Sujan, A Mustari","doi":"10.1080/00071668.2025.2541362","DOIUrl":"https://doi.org/10.1080/00071668.2025.2541362","url":null,"abstract":"<p><p>1. This study assessed the impact of varied stressors on blood leukocyte dynamics and biochemical parameters in broiler chickens. Sixty male broiler chickens (28-30 d old; 1.4-1.5 kg) were divided into four groups (A-D). Group A (control) was reared under optimal conditions. Group B underwent transport stress <i>via</i> a 2-h journey before slaughter. Group C was reared under high stocking density (SD) throughout the rearing period. Group D was exposed to heat stress (37 ± 2°C) for 4 h daily during rearing.2. Exposure to transport and heat stress resulted in a significant increase in circulating heterophils (H), a reduction in lymphocyte (L) counts, and a decrease in serum corticosterone concentrations (<i>p</i> < 0.01), thereby leading to a significantly elevated H:L ratio (<i>p</i> < 0.05). In contrast, serum levels of total protein, alanine aminotransferase (ALT), aspartate aminotransferase (AST), and creatinine level remained unaffected under conditions of transport and stocking density stress.3. Heat stress increased ALT and creatinine while decreasing AST and serum total protein, and reduced triglycerides (TG) levels significantly (<i>p</i> < 0.05) without affecting low density lipoprotein cholesterol (LDL-c), high density lipoprotein cholesterol (HDL-c) or total cholesterol. In contrast, heat stress increased LDL-c, and total cholesterol (<i>p</i> < 0.05), with decreased HDL-c values.4. This study reveals the comparative effects of diverse stressors on blood leukocytes and biochemical parameters in broiler chickens. Understanding these physiological responses is crucial for enhancing poultry management strategies and promoting animal welfare in the context of commercial poultry production.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144834106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nutritional impacts of dietary selenium and iodine and their interaction on growth performance, antioxidant capacity and bone quality in Longyan ducklings. 饲粮硒和碘对龙岩鸭生长性能、抗氧化能力和骨品质的营养影响及其相互作用
IF 1.7 3区 农林科学
British Poultry Science Pub Date : 2025-08-11 DOI: 10.1080/00071668.2025.2531541
X Shang, T Sarker, R Xu, S Wang, W Xia, Y Zhang, C Jin, S Wang, A Elokil, C Zheng, W Chen
{"title":"Nutritional impacts of dietary selenium and iodine and their interaction on growth performance, antioxidant capacity and bone quality in Longyan ducklings.","authors":"X Shang, T Sarker, R Xu, S Wang, W Xia, Y Zhang, C Jin, S Wang, A Elokil, C Zheng, W Chen","doi":"10.1080/00071668.2025.2531541","DOIUrl":"https://doi.org/10.1080/00071668.2025.2531541","url":null,"abstract":"<p><p>1. This study evaluated the effects of selenium (Se) and iodine (I) supplementation and their interaction on growth performance by antioxidant capacity and bone quality development of ducklings aged from hatch to 7 weeks.2. A total of 288 Longyan duck breeders at the age of 20 weeks were randomly allocated to one of the four treatment groups and fed either a basal control diet 0 mg selenium (Se: SE0); a basal diet supplemented with 0.24 mg/kg Se (SE2); a basal diet 0 mg iodine (I: ID0) or basal diet supplemented with 0.40 mg/kg iodine (ID4). At 31 weeks of age, 192 offsprings from each treatment were randomly allocated to one of the four groups with six replicates containing eight birds.3. Dietary supplementation of Se and Se×I interaction in the maternal diet significantly (<i>p</i> < 0.05) decreased malondialdehyde (MDA) concentration and increased glutathione peroxidase-Px (GSH-Px) activity in SE2/ID0 and SE2/ID4 compared to other groups in the duckling's plasma and liver. Feeding SE2 significantly (<i>p</i> < 0.05) increased plasma total antioxidant capacity (T-AOC) activities compared to the SE0 group.4. Ducks and their offspring fed the ID supplementation increased (<i>p</i> < 0.05) tibial weight, length, frontal diameter of articular cartilage, and tubular diameter of articular cartilage in the ID4 group compared to the ID0 group of the ducklings. Maternal and offspring diets supplemented with ID increased (<i>p</i> < 0.05) collagen X (Col X) protein in the tibial cartilage in the ID4 group compared to the ID0 group of the ducklings.5. The results indicated that supplementation of SE and ID into the breeder and duckling diets increased the antioxidant capacity and bone quality for the growth and development of the ducklings.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-11"},"PeriodicalIF":1.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144815767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resveratrol enhances duck cathelicidin expression in heterophilic granulocytes via MAPK-EGR1 signalling pathway. 白藜芦醇通过MAPK-EGR1信号通路增强鸭cathelicidin在异亲性粒细胞中的表达。
IF 1.7 3区 农林科学
British Poultry Science Pub Date : 2025-08-08 DOI: 10.1080/00071668.2025.2541361
W Shenao, Y Hao, S Jing, C XueHong, S Xue, Q Xueyan, Z Tingting, F XingJun, L Xiao
{"title":"Resveratrol enhances duck cathelicidin expression in heterophilic granulocytes <i>via</i> MAPK-EGR1 signalling pathway.","authors":"W Shenao, Y Hao, S Jing, C XueHong, S Xue, Q Xueyan, Z Tingting, F XingJun, L Xiao","doi":"10.1080/00071668.2025.2541361","DOIUrl":"https://doi.org/10.1080/00071668.2025.2541361","url":null,"abstract":"<p><p>1. This study investigated whether resveratrol (RES) can regulate the expression of duck cathelicidins (dCATHs) in heterophilic granulocytes (HGs). To address this, HG was isolated from ducks and treated with RES, followed by transcriptome sequencing to explore potential regulatory pathways.2. Ducks receiving RES treatment had significantly increased dCATH expression in HG. Transcriptomic analysis suggested that this was associated with anti-inflammatory responses and activation of the mitogen-activated protein kinase (MAPK) signalling pathway.3. The results indicated that RES upregulates dCATH expression, potentially through MAPK pathway activation, which would contribute to enhanced immune function in ducks.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-13"},"PeriodicalIF":1.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144798212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Indirubin prevents structural damage to chicken lungs and trachea caused by Mycoplasma gallisepticum infection through attenuating oxidative stress and apoptosis. 靛玉红通过减轻氧化应激和细胞凋亡,防止鸡肺和气管结构损伤。
IF 1.7 3区 农林科学
British Poultry Science Pub Date : 2025-08-04 DOI: 10.1080/00071668.2025.2454965
Y S Miao, Q X Han, K X Wang, X D Fan, Z Zhang, L Chen, D Z Zheng, S Yue, L Lei, L Y Liu, J C Li, G J Liu
{"title":"Indirubin prevents structural damage to chicken lungs and trachea caused by <i>Mycoplasma gallisepticum</i> infection through attenuating oxidative stress and apoptosis.","authors":"Y S Miao, Q X Han, K X Wang, X D Fan, Z Zhang, L Chen, D Z Zheng, S Yue, L Lei, L Y Liu, J C Li, G J Liu","doi":"10.1080/00071668.2025.2454965","DOIUrl":"https://doi.org/10.1080/00071668.2025.2454965","url":null,"abstract":"<p><p>1. This study evaluated the mechanism of action of indirubin in alleviating the structural damage induced by <i>Mycoplasma gallisepticum</i> (MG) in the lungs and trachea.2. A total of 250 one-day-old white leghorn chickens, specific-pathogen-free were divided into six treatment groups, including (A) indirubin high concentration treatment group (50 mg/kg; IHC); (B) indirubin medium concentration treatment group (25 mg/kg; IMC); (C) indirubin low concentration treatment group (12.5 mg/kg; ILC); (D) tylosin control group (0.5 g/l); (E) control group (CON) and (F) challenge model group (MG).3. Results from antioxidant activity analysis demonstrated that indirubin treatment significantly decreased the amount of MG-mediated oxidative stress in the lungs of chickens. Histopathological examination revealed abnormal morphological signs and cell damage in MG birds. This included lung lymphocytic infiltration, overlapping nuclear debris and inflammatory cell infiltration. In addition, ultrastructural examination revealed signs of apoptosis in the lungs. However, indirubin treatment partially relieved these abnormal morphological changes.4. The TUNEL analysis showed extensive apoptosis in the lungs of the model group compared to the control and positive drug control group. Apoptosis-related protein expression levels were significantly upregulated in the model group, which confirmed the phenomena of apoptosis induced by MG. The indirubin treatment significantly reduced apoptosis in the lungs and trachea compared to the model group. Meanwhile, the effect of MG challenge was reduced in the lungs by indirubin in a dose-dependent manner.5. These results showed that the inhibition of oxidative stress and apoptosis by indirubin contributed to its therapeutic effects against MG infection.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-10"},"PeriodicalIF":1.7,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144774714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pharmacokinetics, plasma protein binding and bioavailability of Ketoprofen in Pekin ducks after different routes of administration. 不同给药途径下酮洛芬在北京鸭体内的药动学、血浆蛋白结合及生物利用度。
IF 1.7 3区 农林科学
British Poultry Science Pub Date : 2025-08-04 DOI: 10.1080/00071668.2025.2525518
O Corum, H Oguz, T Erdogan, B Kilinc, E Turk, D Durna Corum, K Uney
{"title":"Pharmacokinetics, plasma protein binding and bioavailability of Ketoprofen in Pekin ducks after different routes of administration.","authors":"O Corum, H Oguz, T Erdogan, B Kilinc, E Turk, D Durna Corum, K Uney","doi":"10.1080/00071668.2025.2525518","DOIUrl":"https://doi.org/10.1080/00071668.2025.2525518","url":null,"abstract":"<p><p>1. Although the anti-inflammatory drug Ketoprofen has been used in ducks, there has been no research on its pharmacokinetics. This study examined the disposition kinetics and bioavailability of Ketoprofen in Pekin ducks after intravenous (IV), intramuscular (IM) and oral administration for the first time.2. A total of 18 ducks were split into three equal groups (<i>n</i> = 6) and were given a single dose of Ketoprofen (5 mg/kg) via IV, IM or oral routes. Blood samples were collected at 16 different time points up to 24 h post-administration to determine the change in Ketoprofen plasma concentration over time by high-performance liquid chromatography with ultraviolet detection.3. Following IV injection, total clearance, volume of distribution at steady state and elimination half-life were 0.31 l/h/kg, 0.32 l/kg and 0.95 h, respectively. Following IM and oral administrations, peak plasma concentrations of 13.82 and 6.76 μg/ml were attained at 0.34 and 0.48 h, respectively. Bioavailability was 106 and 63% for IM and oral route, respectively, and average plasma protein binding was 98.8 ± 2.4%.4. Ketoprofen showed small volume of distribution and rapid elimination in Pekin ducks. The IM injection resulted in higher plasma concentration and bioavailability than oral administration. This information contributes to the use of Ketoprofen in ducks in an appropriate dosage regimen, but efficacy needs to be demonstrated in experimental inflammation models.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144774715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comprehensive estimation of overfeeding influence on goose meat quality. 过度饲养对鹅肉品质影响的综合评价。
IF 1.6 3区 农林科学
British Poultry Science Pub Date : 2025-08-01 Epub Date: 2025-03-05 DOI: 10.1080/00071668.2025.2455520
R Wei, C Han
{"title":"Comprehensive estimation of overfeeding influence on goose meat quality.","authors":"R Wei, C Han","doi":"10.1080/00071668.2025.2455520","DOIUrl":"10.1080/00071668.2025.2455520","url":null,"abstract":"<p><p>1. The aim of this research was to explore the influence of overfeeding on goose meat quality in <i>foie gras</i> production. Forty Tianfu Meat Geese were averagely separated into normal-feeding group (control group) and overfeeding group (force-feeding group), randomly. After overfeeding, the breast muscle and leg muscle were collected, and then the determinations of meat quality variables were performed. The cluster analysis, principal component analysis (PCA) and partial least square-discriminate analysis (PL-SDA) were performed to comprehensively estimate the influence of overfeeding on goose meat quality.2. Overfeeding increased the weights of breast muscle and leg muscle (<i>p <</i> 0.05), increased L*, a* and b* values of breast muscle and leg muscle (<i>p <</i> 0.05), increased the hardness values of breast muscle and leg muscle (<i>p <</i> 0.05), decreased the cooking loss of breast muscle (<i>p <</i> 0.05). In nutritional variables, overfeeding increased the contents of crude fat of breast muscle and leg muscle (<i>p <</i> 0.05). In breast muscle, overfeeding increased the contents of Ala, Tyr, Lys and Val, and decreased the contents of Arg and Phe (<i>p <</i> 0.05); in leg muscle, overfeeding decreased the contents of Asp, Glu, Ser, Ala, Tyr, Val, Phe, Ile and Leu, and increased the contents of Arg, His and Lys (<i>p <</i> 0.05). In fatty acids composition, the contents of C14:0, C16:1, C16:0, C18:2n6c, C18:1n9c, C18:0 and C20:0 of breast muscle significantly increased after overfeeding (<i>p <</i> 0.05). PCA and PLS-DA suggested that overfeeding had significant influence on the meat quality of the breast muscle and leg muscle.3. In conclusion, overfeeding improved the meat quality of overfed geese.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"468-478"},"PeriodicalIF":1.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143555946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluating the genetic components of growth in ostriches with multi-trait and random regression models. 用多性状随机回归模型评价鸵鸟生长的遗传成分。
IF 1.6 3区 农林科学
British Poultry Science Pub Date : 2025-08-01 Epub Date: 2025-01-17 DOI: 10.1080/00071668.2024.2442697
C Nel, A Gilmour, P Muvhali, S Cloete, M Kekana, A Engelbrecht
{"title":"Evaluating the genetic components of growth in ostriches with multi-trait and random regression models.","authors":"C Nel, A Gilmour, P Muvhali, S Cloete, M Kekana, A Engelbrecht","doi":"10.1080/00071668.2024.2442697","DOIUrl":"10.1080/00071668.2024.2442697","url":null,"abstract":"<p><p>1. The heritability (h<sup>2</sup>) of liveweight (LW) in ostriches can be highly variable, depending on age at recording. The objective of this study was to consider random regression (RR) as an alternative to the multi-trait (MT) structure for the analysis of repeated measures of LW.2. The data included 74 683 LW phenotypes recorded from 10 052 birds aged between 20 and 410 days (d) of age. Statistical analysis included single trait (ST), MT and RR analysis in a linear mixed model framework using the ASREML V4.2 software.3. For ST and MT, six traits were defined to represent LW at 28, 77, 150, 230, 300 and 365 d of age. Random variance components included direct genetic and maternal permanent environment (PE) effects. A MT analysis including all six traits converged.4. For RR, the data was transformed (LW + 10)<sup>-0.5</sup> due to difficulty in dealing with large scale effects. The final RR model fitted direct genetic and animal PE components as third degree Legendre polynomials and heterogeneous residuals.5. The h<sup>2</sup> estimates was in agreement across analysis, ranging from moderate (0.16-0.20) for W28 to high (0.41-0.51) for W230 to W365. Importantly, the genetic relationship between LW recorded as a chick and juvenile was only moderate (~0.35 to 0.55). The correlations between RR and MT EBVs for the six traits were 0.85, 0.54, 0.65, 0.75, 0.83 and 0.91, showing a considerable level of re-ranking.6. This study reaffirmed age dependent genetic variation when determining LW in ostriches. The RR structure was useful for overcoming the dimension problem of MT analysis, but was susceptible to scale effects present in the data, despite transformation. It remains unknown whether the need for cubic terms reflected scale or animal effects.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"429-438"},"PeriodicalIF":1.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polymorphism in the MLANA gene and its association with feather pigmentation in Chinese yellow quail (Coturnix japonica). 中国黄鹌鹑MLANA基因多态性及其与羽毛色素沉着的关系
IF 1.6 3区 农林科学
British Poultry Science Pub Date : 2025-08-01 Epub Date: 2025-02-03 DOI: 10.1080/00071668.2025.2451243
X Zhang, F Wu, J Hu, X Ji, Y Qi
{"title":"Polymorphism in the <i>MLANA</i> gene and its association with feather pigmentation in Chinese yellow quail (<i>Coturnix japonica</i>).","authors":"X Zhang, F Wu, J Hu, X Ji, Y Qi","doi":"10.1080/00071668.2025.2451243","DOIUrl":"10.1080/00071668.2025.2451243","url":null,"abstract":"<p><p>1. Melan-A <i>(MLANA)</i> plays a key role in the development of the melanosome, making it a strong candidate for the pigmentation phenotype observed in animals. The main purpose of this study was to analyse the relationship between <i>MLANA</i> gene polymorphisms and tyrosinase (TYR) enzyme activity in skin tissues and melanin content in dorsal down feathers of Chinese yellow quail.2. The coding sequence region of <i>MLANA</i> mRNA was cloned and sequenced to detect polymorphisms. The melanin content in down feathers of 266 Chinese yellow quails was analysed by spectrophotometry, and TYR enzyme activity was measured in dorsal skin tissues. The expression of <i>MLANA</i> mRNA in skin tissues of individuals with different genotypes was analysed using RT-qPCR.3. One non-synonymous single nucleotide polymorphisms (NSSNP; c.218T/A) was identified, which resulted in a Leu36Val mutation in the transmembrane helix region of the MLANA protein. This NSSNP significantly reduced the expression level of <i>MLANA</i> mRNA and TYR enzyme activity in dorsal skin tissues, leading to a significant reduction in melanin content in down feathers.4. The c.218T/A locus of the <i>MLANA</i> gene is closely related to the pigmentation TYR of the down feathers in Chinese yellow quail and can be used as a molecular marker locus for breeding pure feather colour in quail.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"453-457"},"PeriodicalIF":1.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143078592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of pathogenicity factors of avian pathogenic and extraintestinal pathogenic Escherichia coli isolates originating from broiler chickens. 肉鸡源禽致病性与肠外致病性大肠杆菌分离株致病性因子的比较。
IF 1.6 3区 农林科学
British Poultry Science Pub Date : 2025-08-01 Epub Date: 2025-01-24 DOI: 10.1080/00071668.2025.2451242
S Sariçam İnce, A Ünal, M Akan
{"title":"Comparison of pathogenicity factors of avian pathogenic and extraintestinal pathogenic <i>Escherichia coli</i> isolates originating from broiler chickens.","authors":"S Sariçam İnce, A Ünal, M Akan","doi":"10.1080/00071668.2025.2451242","DOIUrl":"10.1080/00071668.2025.2451242","url":null,"abstract":"<p><p>1. <i>E. coli</i> is an opportunist pathogen of animals, including food-producing ones and humans. Chickens may be a notable source of pathogenic and antimicrobial resistant <i>E. coli</i> for transmission to humans.2. This study compared virulence-associated genes (VGs) and antimicrobial resistance (AMR) in avian pathogenic <i>E. coli</i> (APEC) and extraintestinal pathogenic E. coli (ExPEC) isolates from broiler chickens, specifically APEC isolates in liver samples (<i>n</i> = 78) and ExPEC or non-ExPEC isolates in litter samples (<i>n</i> = 34). Virulence was evaluated by PCR for <i>feoB, hlyF, iroN, iss, iutA</i> and <i>ompT</i> genes, while AMR was evaluated by using antimicrobials from seven classes and detecting <i>bla<sub>SHV</sub>, bla<sub>TEM</sub>, bla<sub>OXA</sub>, qnrB, stcM, mrc1, mrc2, sul1</i> and <i>tetA</i> genes.3. The APEC isolates were found in 100% of livers, while ExPEC and non-ExPEC isolates were found in 44% and 56% of the litter samples. The predominant VG was <i>feoB</i> (100%), followed by <i>ompT</i> (63%), <i>iutA</i> (60%), <i>iss</i> (58%) and <i>hlyF</i> (43%). Surprisingly, <i>iroN, omp T</i> and <i>iutA</i> had higher prevalences in APEC isolates (85%, 96% and 96%, respectively) than in ExPEC isolates (73%, 87% and 73%, respectively) and non-ExPEC isolates (0% for all). The presence of all VG in 33% of isolates indicated high pathogenicity.4. The isolates were phenotypically resistant to ampicillin (93%), ceftazidime (72%) and nalidixic acid (82%). All APEC and ExPEC isolates (100%) were multidrug resistant (MDR), while 63% of non-ExPEC isolates were MDR. Genotypic AMR testing revealed that 53% and 52% of all isolates had <i>stcM</i> and <i>tetA</i>, respectively. No isolate was positive for <i>bla<sub>SHV</sub>, bla<sub>OXA</sub>, mrc1</i> or <i>mrc2</i>, which suggested the benefits of colistin for treating carbapenem-resistant enteric pathogens, due to the high resistance detected to meropenem (47%).5. Given the potential pathogenicity of <i>E. coli</i> isolates, improving biosecurity practices in chicken flocks should be prioritised to eliminate transmission to humans through the food chain.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"515-522"},"PeriodicalIF":1.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143032301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A sensitive and rapid visual method of chicken sexing based on LAMP-CRISPR/Cas12a system. 基于LAMP-CRISPR/Cas12a系统的鸡性别鉴定方法
IF 1.6 3区 农林科学
British Poultry Science Pub Date : 2025-08-01 Epub Date: 2025-03-12 DOI: 10.1080/00071668.2025.2454963
Q Chen, C Su, S Li, Z Zhang, Y Yang, Y Yang, D Tao, S Xie, P Gong, Y Feng
{"title":"A sensitive and rapid visual method of chicken sexing based on LAMP-CRISPR/Cas12a system.","authors":"Q Chen, C Su, S Li, Z Zhang, Y Yang, Y Yang, D Tao, S Xie, P Gong, Y Feng","doi":"10.1080/00071668.2025.2454963","DOIUrl":"10.1080/00071668.2025.2454963","url":null,"abstract":"<p><p>1. Accurate sex identification of one-day-old chicks is crucial in layer poultry production. Establishing an early sexing method during the chicken embryonic period is essential for animal welfare. However, PCR-based sexing has limitations in terms of specialised equipment and is time-consuming.2. This study presents a rapid, simple and fluorescent visual technique for chicken sex identification based on Loop-mediated isothermal amplification (LAMP)-clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 12a (Cas12a). It targets the chicken Z chromosome gene DMRT1 and W chromosome-specific fragment EE0.6 using designed primers and sgRNA. The LAMP amplicon is cleaved by Cas12a, producing a fluorescent product detectable by a portable light apparatus.3. The method has high sensitivity, capable of detecting as few as two copies per microlitre of the EE0.6 template and 20 copies per microlitre of the DMRT1 template. This has significant potential for distinguishing chicken embryo gender very early in embryonic development.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"531-538"},"PeriodicalIF":1.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143603955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信