Journal of Dairy Research最新文献

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Development and physicochemical evaluation of a low-phenylalanine and anti-urolithiasis yoghurt based on casein glycomacropeptide and coconut water: in vitro study. 以酪蛋白糖肽和椰子水为基础的低苯丙氨酸抗尿石症酸奶的研制及理化评价。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-10-08 DOI: 10.1017/S0022029926102568
Lida Majidinia, Ladan Majidinia, Hossein Mirsaeedghazi, Ahmad Kalbasi-Ashtari
{"title":"Development and physicochemical evaluation of a low-phenylalanine and anti-urolithiasis yoghurt based on casein glycomacropeptide and coconut water: <i>in vitro</i> study.","authors":"Lida Majidinia, Ladan Majidinia, Hossein Mirsaeedghazi, Ahmad Kalbasi-Ashtari","doi":"10.1017/S0022029926102568","DOIUrl":"https://doi.org/10.1017/S0022029926102568","url":null,"abstract":"<p><p>Individuals with metabolic disorders such as phenylketonuria (PKU) and kidney stone disease may be unable to consume conventional dairy products because of their high phenylalanine content. This study used different concentrations of glycomacropeptide (GMP; 2.5% and 3.0%) and starch (1.5% and 2.0%), which served as the independent formulation variables. All other ingredients, including coconut water (CW), Yoghurt culture, fermented unsalted butter, iota-carrageenan, inulin, sugar, stevia and stabilizers, were added at the same levels in all formulations. Physicochemical properties, antioxidant capacity, lactic acid bacteria viability, phenylalanine concentration and <i>in vitro</i> inhibition of calcium oxalate (CaOx) nucleation, growth and aggregation were assessed in the prepared Yoghurt samples during 14 days of 4°C storage. Among the tested formulations, F-4 (3% GMP and 2% starch) exhibited the most favourable physicochemical, microbiological and functional properties. The resulting reduced-sugar Yoghurt contained ultra-low phenylalanine (only 8.403 mg/100 g), well below the recommended dietary intake for individuals with PKU. Furthermore, F-4 demonstrated superior antioxidant stability, the highest microbial viability and the lowest syneresis during storage. It inhibited CaOx crystal nucleation, growth and aggregation by up to 30.87%, 33.24% and 36.85%, respectively, suggesting potential anti-urolithiasis activity. Sensory evaluation of the F-4 GMP-CW Yoghurt confirmed high consumer acceptability. Collectively, these findings indicate that the optimized F-4 GMP-CW fermented Yoghurt may provide metabolically tailored nutrition by combining phenylalanine restriction with moderate anti-urolithiatic activity. It may therefore have potential as a functional food to support nutritional management while offering antioxidant and anti-urolithiasis-related benefits.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-12"},"PeriodicalIF":1.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149127778","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
Review and assessment of sensor-based disease detection in dairy cattle: conceptual and practical challenges. 审查和评估奶牛基于传感器的疾病检测:概念和实践挑战。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-10-06 DOI: 10.1017/S0022029926102258
Morteza Hosseini Ghaffari, Harald Hammon, Ute Müller
{"title":"Review and assessment of sensor-based disease detection in dairy cattle: conceptual and practical challenges.","authors":"Morteza Hosseini Ghaffari, Harald Hammon, Ute Müller","doi":"10.1017/S0022029926102258","DOIUrl":"https://doi.org/10.1017/S0022029926102258","url":null,"abstract":"<p><p>Recent advances in sensor technologies and machine learning have increased expectations for actionable disease detection in dairy cattle, yet farm-level adoption remains limited. This conceptual review outlines an implementation trajectory from proof of concept to deployment as follows: (i) case definitions and defensible reference standards for diseases such as mastitis, lameness and respiratory disease should be biologically based; (ii) model development should consider features that drive utility and address class imbalance, ensuring that algorithms can reliably detect diseases that occur infrequently within herds; (iii) external validation should occur at the herd level, across seasons and time, and should report prevalence-aware metrics (e.g., recall and precision [positive predictive value]) rather than relying solely on accuracy or receiver operating characteristic area under the curve; and (iv) interoperability and economic viability should be sufficient to support multi-sensor use and sustainable adoption. Economic factors such as hardware and software costs, follow-up time burden, usefulness and return on investment under realistic false-positive rates will primarily determine adoption. Ethical and welfare considerations include maintaining human oversight where possible, avoiding invasive sensing and preventing over-automation. In conclusion, sensor-based systems show promise but remain constrained by inconsistent case definitions, limited cross-herd validation, interoperability gaps and uncertain economics, and many tools still blur the line between detecting animals needing treatment and ancillary predictions. With regulatory and ethical safeguards, progress will depend on reliability-focused standard operating procedures and end-user-oriented design; until then, most systems remain closer to hype than independent clinical technologies.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-8"},"PeriodicalIF":1.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110434","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
Preparation, physicochemical characterisation, storage stability and in vitro disinfectant activity of Tagetes minuta (L.) essential oil-loaded polycaprolactone nanocapsules against mastitis pathogens. 万寿草精油聚己内酯纳米胶囊的制备、理化性质、贮存稳定性及对乳腺炎病原体的体外杀菌活性
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-10-05 DOI: 10.1017/S002202992610257X
Daniela Aparecida Moreira, Karin Possebon Bolzan, Leticia Mazzarino, Maria Beatriz Veleirinho, Luciana Aparecida Honorato, Luiz Filipe Dame Schuch, Luiz Carlos Pinheiro Machado Filho, Shirley Kuhnen
{"title":"Preparation, physicochemical characterisation, storage stability and <i>in vitro</i> disinfectant activity of <i>Tagetes minuta</i> (L.) essential oil-loaded polycaprolactone nanocapsules against mastitis pathogens.","authors":"Daniela Aparecida Moreira, Karin Possebon Bolzan, Leticia Mazzarino, Maria Beatriz Veleirinho, Luciana Aparecida Honorato, Luiz Filipe Dame Schuch, Luiz Carlos Pinheiro Machado Filho, Shirley Kuhnen","doi":"10.1017/S002202992610257X","DOIUrl":"https://doi.org/10.1017/S002202992610257X","url":null,"abstract":"<p><p>This study focuses on the development of nanocapsules loaded with <i>Tagetes minuta</i> essential oil (TEO-NC) for milking management in sustainable dairy systems. The nanocapsules were prepared by nanoprecipitation, and their physicochemical properties were evaluated for 60 days at 4°C and 25°C. Antimicrobial and disinfectant activities were evaluated in the presence and absence of organic matter and on contaminated surfaces, such as rubber, stainless steel and ceramics. TEO-NCs had an average particle size of 266.67 ± 18.28 nm, polydispersity index (PdI) <0.12, zeta potential of 42.70 ± 1.08 and pH of 4.09 ± 0.08. Moreover, TEO-NCs showed no visual changes, and the physicochemical changes were minimal at the two temperatures tested. The minimum inhibitory concentration of TEO-NCs against <i>Staphylococcus aureus</i> was 50% (v/v). The disinfectant activity of TEO-NCs (100 and 50%, v/v) was demonstrated against <i>Pseudomonas aeruginosa</i> in the absence of organic matter after 5, 15 and 30 min. Disinfectant activity against <i>S. aureus</i> was demonstrated after 15 and 30 min (100%, v/v). In the presence of organic matter, the disinfectant activity of TEO-NCs (100%, v/v) was effective only against <i>P. aeruginosa</i>. Similarly, disinfectant activity of TEO-NCs against <i>P. aeruginosa</i> was demonstrated after 15 and 30 min on the three surfaces tested. Our results highlight the potential of <i>T. minuta</i> essential oils, a natural product, which, when combined with nanocapsules, results in a potential alternative for teat disinfection in milking management, especially in the control of environmental mastitis.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110499","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
Milk yield and production traits in one intensive-managed dairy farm located in central Chile. 位于智利中部的一个集约化管理奶牛场的产奶量和生产特性。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-30 DOI: 10.1017/S0022029926102660
Felipe Lembeye, Mario Duchens, Gustavo Schuenemann
{"title":"Milk yield and production traits in one intensive-managed dairy farm located in central Chile.","authors":"Felipe Lembeye, Mario Duchens, Gustavo Schuenemann","doi":"10.1017/S0022029926102660","DOIUrl":"https://doi.org/10.1017/S0022029926102660","url":null,"abstract":"<p><p>This study described milk yield (MY), fat yield (FY), protein yield (PY), somatic cell score (SCS) and lactation persistency in Holstein Friesian cows managed in an intensive indoor system in central Chile. Data from 206 cows (329 lactations; 3,021 test-day records) collected between 2022 and 2026 were analysed using fourth-order Legendre polynomials and linear models to evaluate the effects of parity, calving season and stage of lactation (SL). Multiparous cows showed higher (<i>P</i> < 0.05) daily MY than primiparous cows during early lactation (35.4 vs. 30.9 kg/day in SL1; 36.1 vs. 33.0 kg/day in SL2), although accumulated MY did not differ between parities (9,940 vs. 10,248 kg for primiparous and multiparous cows, respectively). In contrast, primiparous cows exhibited greater lactation persistency than multiparous cows (-0.0378 vs. - 0.0514 kg/day for primiparous and multiparous cows, respectively), indicating flatter lactation curves. Calving season significantly affected MY, with winter-calving cows producing more milk than summer-calving cows (10,325 vs. 9,862 kg, for winter- and summer-calving, respectively), particularly during mid- and late-lactation (1.0-2.1 kg/day in SL2-SL4). However, these differences were not reflected in FY and PY. Across SL, SCS was higher in multiparous than primiparous cows (4.04-4.91 vs. 3.02-3.58), but was not affected by calving season. These findings highlight the importance of parity and calving season in interpreting milk traits and designing management strategies in intensive dairy systems.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149080547","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
The milk processing system of the Mongolian pastoralist Heshigten group in Inner Mongolia Autonomous Region, China. 中国内蒙古自治区赫什腾蒙古族牧民的牛奶加工系统。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-28 DOI: 10.1017/S0022029926102635
Masahiro Hirata, Narigan
{"title":"The milk processing system of the Mongolian pastoralist Heshigten group in Inner Mongolia Autonomous Region, China.","authors":"Masahiro Hirata, Narigan","doi":"10.1017/S0022029926102635","DOIUrl":"https://doi.org/10.1017/S0022029926102635","url":null,"abstract":"<p><p>The purpose of this study was to: 1) conduct a field survey to understand the milk processing techniques of the sedentary Mongolian pastoralists in Darahan Or Sumu, Heshigten Banner, Inner Mongolia Autonomous Region; 2) clarify their characteristics through comparison with cases from surrounding regions; and 3) analyse their knowledge from the perspective of milk science. Field surveys were conducted in August 2025, covering a total of five Heshigten households. The Heshigten group is characterised by a specialisation in cream separation techniques, the absence of sour milk processing and the production of both distilled spirits from whey and stretchable cheeses. These features constitute a distinctive milk culture in central Inner Mongolia. In the no-heating cream separation process, whey generated during curd processing under low-temperature heating is allowed to undergo natural fermentation. It is subsequently heated to produce <i>shar osnii aarool</i>, a whey protein-based cheese. All of the whey produced is fully utilised in the production of distilled spirits. From the perspective of milk science, these practices indicate that the indigenous knowledge of milk processing among the Heshigten group is grounded in technically valid principles. Furthermore, stretchable <i>pasta filata</i> cheeses known as <i>changaldum khorood</i> and <i>khorood</i> are produced without the use of rennet. In contrast, <i>pasta filata</i> cheeses produced using rennet are traditionally developed in the eastern Mediterranean region. Given the differences in the use of rennet as a coagulant and the absence of evidence for <i>pasta filata</i> cheeses in Central Asia and the Indian subcontinent, this study proposes the hypothesis of a 'dual independent origin of <i>pasta filata</i> technique in Eurasia', whereby <i>pasta filata</i> cheeses emerged independently in the eastern Mediterranean and in the Inner Mongolia-Tibetan Plateau.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-10"},"PeriodicalIF":1.6,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149069686","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
Ruminant colostrum: recent papers highlighting areas of interest and directions for future research. 反刍动物初乳:最近的论文突出了未来研究的兴趣和方向。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-28 DOI: 10.1017/S0022029926102714
Katharine Denholm
{"title":"Ruminant colostrum: recent papers highlighting areas of interest and directions for future research.","authors":"Katharine Denholm","doi":"10.1017/S0022029926102714","DOIUrl":"https://doi.org/10.1017/S0022029926102714","url":null,"abstract":"","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-2"},"PeriodicalIF":1.6,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149069702","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
Evaluation of automated milk feeders for early detection of respiratory disease complex in dairy calves on five commercial farms. 对5个商业农场的奶牛犊牛呼吸系统疾病早期检测的自动喂奶器进行评估。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-24 DOI: 10.1017/S0022029926102611
Asma Bousselmi, Eden Poulin, Édith Charbonneau, Sébastien Buczinski, Éric R Paquet
{"title":"Evaluation of automated milk feeders for early detection of respiratory disease complex in dairy calves on five commercial farms.","authors":"Asma Bousselmi, Eden Poulin, Édith Charbonneau, Sébastien Buczinski, Éric R Paquet","doi":"10.1017/S0022029926102611","DOIUrl":"https://doi.org/10.1017/S0022029926102611","url":null,"abstract":"<p><p>This research communication describes the evaluation of automated milk feeder (AMF) data for early detection of bovine respiratory disease (BRD) in dairy calves under commercial conditions. BRD is a major health challenge in the dairy industry, contributing to increased morbidity and mortality. Early identification could reduce its impact and improve herd health management. Five commercial dairy farms in Quebec, Canada, representing diverse calf management practices, were enrolled. Daily AMF data - including milk consumption (mL/day), drinking speed (mL/min) and numbers of rewarded and unrewarded visits - were collected over 1 year. The dataset comprised 90,088 daily records from 1,995 Holstein calves. Calves first accessed AMF between 7 and 14 days of age, depending on farm practices. Disease records were obtained from producers, and calves were classified as ill at their first treatment for BRD. The proportion of calves treated for BRD ranged from 20% on Farm 2 to 24% on Farm 3. Healthy and BRD calves were paired by month and duration of AMF use (±2 days). Linear mixed models were fitted for each farm with health status, days relative to treatment, month, and their interactions as fixed effects, and calf as a random effect. Heterogeneity between farms was evident in the results, and multiple farms showed a significant difference between healthy calves and those with BRD for each of the studied parameters, but with different days associated with the significant result. The earliest significant differences were observed at 0 days for drinking speed, -5 days for the number of unrewarded visits, -3 days for both consumption and the number of unrewarded visits, -4 days for the number of unrewarded visits and -5 days for both consumption and drinking speed on Farms 1-5, respectively. AMFs show promise for early BRD detection, but detection timing and the usefulness of specific measurements vary across farms.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-7"},"PeriodicalIF":1.6,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149030511","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
Determination of alkaline phosphatase inactivation in pasteurised milk under different heat treatment conditions. 不同热处理条件下巴氏奶中碱性磷酸酶失活的测定。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-22 DOI: 10.1017/S0022029926101988
Monisa Gouvêa Silva, Kamilla Sousa Silva, Natalia Casas Mesa, Jaqueline de Almeida Celestino, Ítalo Tuler Perrone, Luiz Fernando Cappa de Oliveira, Rodrigo Stephani
{"title":"Determination of alkaline phosphatase inactivation in pasteurised milk under different heat treatment conditions.","authors":"Monisa Gouvêa Silva, Kamilla Sousa Silva, Natalia Casas Mesa, Jaqueline de Almeida Celestino, Ítalo Tuler Perrone, Luiz Fernando Cappa de Oliveira, Rodrigo Stephani","doi":"10.1017/S0022029926101988","DOIUrl":"https://doi.org/10.1017/S0022029926101988","url":null,"abstract":"<p><p>Raw milk is considered an excellent culture medium for a variety of pathogenic and non-pathogenic microorganisms. The effectiveness of raw milk pasteurisation is verified internationally by measuring residual alkaline phosphatase (ALP) activity. The aim of this study was to evaluate the performance of the official Brazilian qualitative method in comparison with Scharer's quantitative spectrophotometric method for assessing ALP inactivation. The evaluation was carried out on samples of raw milk subjected to different heat treatments (67, 70, 72, 75, and 77 °C for 20 s, and 65 °C for 30 min). In addition, the influence of fat content on the thermal protection of the enzyme was assessed, and detection limits were determined by adding phenol standard solutions to milk with inactivated ALP. The official qualitative method did not demonstrate sufficient sensitivity, with a visual detection limit of 4.13 μg phenol ml-1, which is four times higher than the internationally accepted limit for inadequate pasteurisation, thus generating false-negative results in under-pasteurised samples. A positive correlation was established between the fat content of the milk and the residual ALP activity, demonstrating that the membrane of milk fat globules provides significant thermal protection to the enzyme. Furthermore, Scharer's quantitative method produced false-positive results for properly pasteurised samples, suggesting that its established quantitative limit may be inadequate. In conclusion, the official Brazilian qualitative method proved inadequate for reliably verifying the safety of milk pasteurisation, and the limit established by the Scharer method requires optimisation to avoid false positives in milk testing.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-7"},"PeriodicalIF":1.6,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149017107","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
Modelling the impacts of thermal stress on milk production in Sahiwal cows using random regression models integrated with NASA POWER data. 结合NASA POWER数据的随机回归模型模拟热应激对Sahiwal奶牛产奶量的影响。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-22 DOI: 10.1017/S0022029926102404
P Priyadharshini, Rani Alex, Gopal Gowane, Sabyasachi Mukherjee, Phoebe C Lalremruati, Vikas Vohra, Thiruvothur Venkatesan Raja
{"title":"Modelling the impacts of thermal stress on milk production in Sahiwal cows using random regression models integrated with NASA POWER data.","authors":"P Priyadharshini, Rani Alex, Gopal Gowane, Sabyasachi Mukherjee, Phoebe C Lalremruati, Vikas Vohra, Thiruvothur Venkatesan Raja","doi":"10.1017/S0022029926102404","DOIUrl":"https://doi.org/10.1017/S0022029926102404","url":null,"abstract":"<p><p>Climate change, through intensified heat and cold stress, increasingly threatens dairy cattle productivity. This study quantified milk yield losses due to thermal stress and evaluated the genetic basis of climatic resilience in Sahiwal cattle using random regression models (RRMs). A total of 132,548 daily milk yield (DMY) records from 500 Sahiwal cows maintained at ICAR-National Dairy Research Institute, Karnal, India, were analysed. Climatic variables from the NASA POWER (National Aeronautics and Space Administration Prediction of Worldwide Energy Resources) database were used to estimate the comprehensive climatic index to characterize thermal stress risk. RRMs incorporating second-order Legendre polynomials for additive genetic effects and fourth-order polynomials for permanent environmental effects provided the best fit. Heat stress was the primary climatic factor affecting productivity, causing an average milk loss of 53.54 kg per animal in a standard first lactation of 305 days, while cold stress resulted in a 2.78 kg loss during the first lactation. According to the study, the combined effects of temperature and humidity make the monsoon season - especially July - more stressful than the pre-monsoon summer season. Since heat stress accounted for approximately 95% of the observed milk loss, the study also demonstrated how severe heat stress is compared to cold stress in the study location. Resilience traits had heritability values ranging from 0.06 for total milk loss due to heat stress to 0.19 for r-Auto due to thermal stress. Except for skew, which measures skewness from DMY deviations and the degree of asymmetry in the records, most resilience traits showed positive genetic relationships with productivity. Heat stress effects were most severe during mid-lactation, whereas cold stress predominantly affected the early and late lactations. These findings provide critical insights for developing climate-resilient dairy management strategies and genetic selection programmes to mitigate the severity of climatic stress under the climate change scenarios.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-13"},"PeriodicalIF":1.6,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149017061","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
Epidemiology of hoof lesions in Southern Italian dairy cows across hoof-trimming sessions: a retrospective observational pilot study. 意大利南部奶牛蹄子病变的流行病学:一项回顾性观察性试点研究。
IF 1.6 3区 农林科学
Journal of Dairy Research Pub Date : 2026-09-21 DOI: 10.1017/S0022029926102507
Giovanni Capuzzello, Laura Randall, Maurizio Marusi, Raffaella Finocchiaro, Lorenzo Benzoni, Giovanni Schembari, Fabio Testori, Salvatore Monti, Gabriele Marino, Christopher Hudson
{"title":"Epidemiology of hoof lesions in Southern Italian dairy cows across hoof-trimming sessions: a retrospective observational pilot study.","authors":"Giovanni Capuzzello, Laura Randall, Maurizio Marusi, Raffaella Finocchiaro, Lorenzo Benzoni, Giovanni Schembari, Fabio Testori, Salvatore Monti, Gabriele Marino, Christopher Hudson","doi":"10.1017/S0022029926102507","DOIUrl":"https://doi.org/10.1017/S0022029926102507","url":null,"abstract":"<p><p>As part of a nationwide initiative to standardise claw health data in Italian dairy cows, this retrospective observational pilot study used hoof-trimming records from 2023 to 2025 to quantify the prevalence and anatomical distribution of hoof lesions in Southern Italian herds. Data from 94 dairy farms were analysed, comprising 24,158 trimming events from 13,782 unique cows across 246 routine visits conducted for preventive and therapeutic purposes. Records included Farm ID, Cow ID, trimming date, lesion diagnosis and anatomical location, captured using dedicated hoof-trimming software. Lesion presence was defined as a binary outcome and analysed at cow-, farm-, claw- and lesion-type levels. Prevalence estimates were calculated at the cow and farm levels and by lesion type. Claw-level differences were assessed using mixed-effects logistic regression, with lesion presence as the outcome, anatomical site (front lateral, front medial, hind lateral, hind medial) as the explanatory variable, and random intercepts for farm and cow. The median number of cows trimmed per visit was 73.5 (interquartile range: 48.3-110.5), and the median interval between visits was 216.5 days. Overall, cow-level lesion prevalence was 27.4% and decreased with increasing visit size (49.3% in Q1 to 22.5% in Q4). Among 11,408 lesions, digital dermatitis (30.1%) predominated, followed by corkscrew claw (21.4%), white line disease (15.6%) and sole haemorrhage (14.4%). Lesions were more frequent in hind feet (71.5%) than front feet (28.5%). Relative to the front lateral claw, lesion odds were higher in the front medial (odds ratios [OR]: 5.85, 95% confidence interval [CI]: 5.17-6.62) and hind medial claws (OR: 2.53, 95% CI: 2.23-2.89), and highest in the hind lateral claw (OR: 16.93, 95% CI: 14.97-19.14). This study provides region-specific epidemiological evidence within a national claw health framework, highlighting inter-farm heterogeneity and the utility of routine trimming data for future epidemiological and genetic analyses.</p>","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-8"},"PeriodicalIF":1.6,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149012323","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}
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