Journal of Dairy Research最新文献_第4页

Geometry of milk liners affects milking performance in dairy cows 奶杯内套的几何形状影响奶牛的挤奶性能

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-09-16 DOI: 10.1017/s002202992400027x

H. M Gayani P. Herath, Dino Kudrass, Racheal H. Bryant, Omar Al-Marashdeh

{"title":"Geometry of milk liners affects milking performance in dairy cows","authors":"H. M Gayani P. Herath, Dino Kudrass, Racheal H. Bryant, Omar Al-Marashdeh","doi":"10.1017/s002202992400027x","DOIUrl":"https://doi.org/10.1017/s002202992400027x","url":null,"abstract":"The geometry of milk liners may affect milking performance and cow comfort as the milk liner is the only part of the milking machine that comes into contact with the teat. To determine the effect of alternative shape of milk liners we compared square (SQR) vs. the conventional round (RND) teat cup liner on milking performance and comfort of dairy cows. Treatment milk liners were randomly allocated to clusters within each side of the 12 a side double up-herringbone dairy shed in a complete randomised block design over two periods. Milking performance data from a total of 10 065 (late stage of lactation and once-a-day milking frequency, LATE) and 18 048 (early stage of lactation and twice-a-day milking frequency, EARLY) milking events were automatically recorded by a DeLaval milk meter, and separately analysed for LATE and EARLY, respectively. In EARLY, cow comfort behaviour was also recorded during afternoon milking sessions. Across the two study periods, average milk flow rate, milk flow rate during 0–15, 15–30 and 30–60 s after cluster attachment, and milk flow rate at cluster take-off were higher in SQR compared to RND treatment. Proportion of time in a milking session with low milk flow rate and duration of milking session were less in SQR compared to RND treatment. However, effect of geometry of milk liner on peak milk flow rate was inconsistent across the two-study periods. Peak milk flow rate was higher (P < 0.001) in SQR than RND in LATE, but higher (P < 0.001) in RND than SQR in EARLY. Stomping and kicking behaviours of cows were similar between treatments. Results of this study suggest that square milk liners potentially improve milking performance, without adverse effect on cow comfort compared to conventional round liners. Long-term, multi-site studies are required to confirm potential teat-end health benefits associated with square milk liners and further verify these results.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":"24 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249059","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

Variation in bovine milk stability according to lactational stage and genetic group 不同泌乳阶段和基因组对牛乳稳定性的影响

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-09-16 DOI: 10.1017/s0022029924000372

Bruna Schmitz, Olmar Antônio Denardin Costa, Ana Carolina Fluck, Leonardo Piffer de Borba, Adriano Henrique do Nascimento Rangel, Vivian Fischer

{"title":"Variation in bovine milk stability according to lactational stage and genetic group","authors":"Bruna Schmitz, Olmar Antônio Denardin Costa, Ana Carolina Fluck, Leonardo Piffer de Borba, Adriano Henrique do Nascimento Rangel, Vivian Fischer","doi":"10.1017/s0022029924000372","DOIUrl":"https://doi.org/10.1017/s0022029924000372","url":null,"abstract":"We address the hypothesis that at early and late lactation milk presents low ethanol stability due to high acidity and ionic calcium values. Our aim was to evaluate the functional traits of milk (milk ethanol stability: MES, acidity and ionic calcium: iCa) according to lactation stage in different genetic groups. Raw milk samples were collected from Jersey (n = 271), Holstein (n = 248) and Jersey × Holstein crossbred cows (n = 82), raised on five commercial farms located in the state of Paraná, Brazil. Milk composition, somatic cell count (SCC), milk urea nitrogen (MUN), MES, pH, acidity and iCa were determined. Days in milk (DIM) were categorized into four classes: 1–60, 61–150, 151–305 and over 305 DIM. Data were submitted to analysis of variance. Fixed and random effects were incorporated into the model, in a repeated measures in time arrangement using the mixed models methodology. Significant interactions between DIM class and genetic groups were detected. The comparison between each combination of genetic group and DIM class showed that at the beginning of lactation, Holsteins produced milk with higher MES than Jersey and crossbreds. At 105–305 DIM Holstein milk presented higher MES than Jersey, while beyond 305 DIM Holstein milk showed higher MES than crossbred cows. At the beginning of lactation acidity was higher in Holstein milk and crossbreds compared with Jersey, while acidity was lower in Holstein milk compared with Jersey and crossbreds in the other lactation stages. Ionic calcium was highest after lactation peak for Holstein, but did not vary between lactation stages for Jersey and crossbreds. Functional characteristics of bovine raw milk such as MES, iCa and acidity varied between lactation stages in a distinct manner according to genetic groups. Early and end lactation stages are challenging in terms of low stability, especially for Jersey and crossbreds.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":"14 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248899","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

In vitro antimicrobial and antibiofilm activity of phage cocktail against Mammaliicoccus sciuri, a causative agent of bovine mastitis. 噬菌体鸡尾酒对牛乳腺炎致病菌 Mammaliicoccus sciuri 的体外抗菌和抗生物膜活性。

IF 1.6 3区农林科学

Journal of Dairy Research Pub Date : 2024-08-27 DOI: 10.1017/S0022029924000384

Puthiya Maliyekkal Shahana Shirin, Archana Chandran, Pathiyarathvalappill Subrahmanian Surabhi, Ramachandran Latha Rathish, Mundakka Paramban Rahila

{"title":"In vitro antimicrobial and antibiofilm activity of phage cocktail against Mammaliicoccus sciuri, a causative agent of bovine mastitis.","authors":"Puthiya Maliyekkal Shahana Shirin, Archana Chandran, Pathiyarathvalappill Subrahmanian Surabhi, Ramachandran Latha Rathish, Mundakka Paramban Rahila","doi":"10.1017/S0022029924000384","DOIUrl":"https://doi.org/10.1017/S0022029924000384","url":null,"abstract":"In this research paper the in vitro antimicrobial and antibiofilm activity of phage cocktail against the coagulase negative Mammaliicoccus sciuri was investigated. Three M. sciuri isolates obtained from clinical bovine mastitis samples were characterized and identified by 16S rRNA gene sequencing. Bacteriophages with lytic activity against M. sciuri isolates were isolated from dairy farm effluents. Two typical phages were isolated using standard enrichment and plaque assay techniques, purified by polyethylene glycol precipitation, and morphologically characterized based on shape and size using transmission electron microscopy. This was followed by determination of host range using spot tests and stability to varying temperature, pH and UV treatment. The phage cocktail suppressed bacterial activity within 30 min of exposure. Crystal violet assay showed that the tested phages and their cocktail significantly reduced the biofilm biomass of all three M. sciuri strains compared to the untreated control in vitro within 24 h with a single dosing. Transmission electron micrography of the purified phage particle revealed an icosahedral head and a rigid contractile tail, characteristic of the class Caudoviricetes. The findings open new avenues in phage-based antimicrobial approaches for controlling contagious and teat skin opportunistic bacteria causing bovine mastitis.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-6"},"PeriodicalIF":1.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142072998","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

Relationship between body weight and hip width in dairy buffaloes (Bubalus bubalis). 奶水牛（Bubalus bubalis）体重与臀宽之间的关系。

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-05-30 DOI: 10.1017/S0022029924000311

Alvar Alonzo Cruz-Tamayo, Marco Antonio Ramírez-Bautista, Daniel Mota-Rojas, José Carlos Escobar-España, Ricardo García-Herrera, Antonio Leandro Chaves Gurgel, Tairon Pannunzio Dias-Silva, Marcos Jácome de Araújo, Juliana Caroline Santos Santana, Isadora Osorio Maciel Aguiar, Luís Carlos Vinhas Ítavo, Alfonso Juventino Chay-Canul

{"title":"Relationship between body weight and hip width in dairy buffaloes (Bubalus bubalis).","authors":"Alvar Alonzo Cruz-Tamayo, Marco Antonio Ramírez-Bautista, Daniel Mota-Rojas, José Carlos Escobar-España, Ricardo García-Herrera, Antonio Leandro Chaves Gurgel, Tairon Pannunzio Dias-Silva, Marcos Jácome de Araújo, Juliana Caroline Santos Santana, Isadora Osorio Maciel Aguiar, Luís Carlos Vinhas Ítavo, Alfonso Juventino Chay-Canul","doi":"10.1017/S0022029924000311","DOIUrl":"https://doi.org/10.1017/S0022029924000311","url":null,"abstract":"The objective of the present study was to evaluate the relationship between body weight (BW) and hip width (HW) in dairy buffaloes (Bubalus bubalis). HW was measured in 215 Murrah buffaloes with a BW of 341 ± 161.6 kg, aged between three months and five years, and raised in southeastern Mexico. Linear and non-linear regressions were used to construct the prediction models. The goodness of fit of the models was evaluated using the Akaike information criterion (AIC), Bayesian information criterion (BIC), coefficient of determination (R2), mean squared error (MSE), and root MSE (RMSE). Additionally, the developed models were evaluated through internal and external cross-validation (k-folds) using independent data. The ability of the fitted models to predict the observed values was assessed based on the root mean square error of prediction (RMSEP), R2, and mean absolute error (MAE). The relationship between BW and HW showed a high correlation coefficient (r = 0.96, P < 0.001). The chosen fitted model to predict BW was: -176.33 (± 40.83***) + 8.74 (± 1.79***) × HW + 0.04 (± 0.01*) × HW2, because it presented the lowest MSE, RMSE, and AIC values, which were 1228.64, 35.05 and 1532.41, respectively. Therefore, with reasonable accuracy, the quadratic model using hip width may be suitable for predicting body weight in buffaloes.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141174506","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

Effect of double-premilking teat disinfection protocols on bacterial counts on teat skin of cows and milker gloves in a free-stall-housed dairy herd. 双重挤奶乳头消毒方案对自由挤奶厅奶牛群中奶牛乳头皮肤和挤奶工手套上细菌数量的影响。

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-05-27 DOI: 10.1017/S0022029924000335

Thiago Resin Niero, Roberto Kappes, Angelica Leticia Scheid, Andreina Ferreira Ramos, Eduardo Becker Ribeiro, Leonardo Leite Cardozo, Sandra Maria Ferraz, André Thaler Neto

{"title":"Effect of double-premilking teat disinfection protocols on bacterial counts on teat skin of cows and milker gloves in a free-stall-housed dairy herd.","authors":"Thiago Resin Niero, Roberto Kappes, Angelica Leticia Scheid, Andreina Ferreira Ramos, Eduardo Becker Ribeiro, Leonardo Leite Cardozo, Sandra Maria Ferraz, André Thaler Neto","doi":"10.1017/S0022029924000335","DOIUrl":"https://doi.org/10.1017/S0022029924000335","url":null,"abstract":"This research communication addresses the hypothesis that double premilking teat disinfection (DD) is more effective in reducing soiling and bacterial count on the cows' teat skin and milkers' gloves than conventional disinfection (CONV). The design was a 3 × 3 Latin square (three groups of cows and three treatments) with conventional teat disinfection (CONV, lactic acid application after forestripping), double teat disinfection using the same disinfectant (DD1D, lactic acid application before and after forestripping), and double teat disinfection using two different disinfectants (DD2D, application of lactic acid before and chlorine-based disinfectant after forestripping). All groups were assigned for six days for each treatment, and the evaluations and samples were collected on the last day, before and after treatment. We evaluated the teat cleanliness score (TCS), count of Gram-negative bacteria (coliforms and noncoliforms), Staphylococcus spp., Streptococcus spp., and total bacterial count (TBC) on the cows' teats and TBC on the milkers' gloves. TCS after premilking was lower in DD than CONV treatment. The reduction of Staphylococcus spp. count was greater in the DD treatment and tended to be higher in the DD2D. The TBC reduction on the cows' teats was greater in the DD treatments. The TBC on the milkers' gloves was lower for DD before and after premilking. In conclusion, DD can be an alternative for reducing some bacterial populations on cow teats and preventing the transmission of microorganisms between cows via the milkers' hands.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141154914","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

Investigating the relationship between heat load and shade seeking behaviour in dairy buffaloes. 调查奶水牛的热负荷与寻阴行为之间的关系。

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-05-09 DOI: 10.1017/S0022029924000256

Syed I Hussain, Muhammad A Rashid, Muhammad Q Shahid

{"title":"Investigating the relationship between heat load and shade seeking behaviour in dairy buffaloes.","authors":"Syed I Hussain, Muhammad A Rashid, Muhammad Q Shahid","doi":"10.1017/S0022029924000256","DOIUrl":"https://doi.org/10.1017/S0022029924000256","url":null,"abstract":"The study presented in this Research Communication aimed to investigate the relationship between physiological responses, body surface temperature and shade-seeking behaviour in Nili Ravi dairy buffaloes during summer months. We enrolled 60 buffaloes, and each animal was observed for three consecutive days starting before sunrise until they moved towards the shade structures. A repeated measures ANOVA was employed to assess the changes in physiological parameters and body surface temperature between the early morning and the occurrence of shade-seeking behaviour. The average temperature humidity index and heat load index during the behavioural monitoring period (0400 to 1200 h) were 81.3 ± 6.5 and 92.9 ± 17, respectively (mean ± sd). There was no significant difference in core body temperature between sunrise and the time of shade-seeking event. However, the buffaloes had a slightly higher respiration rate at the time of shade-seeking (19.2 vs. 22.4 breaths/min). In addition, body surface temperature, measured at the flank region, shoulder, base of the ear and forehead was significantly higher at the occurrence of shade-seeking behaviour compared to the early morning. On average, the buffaloes sought shade when the surface temperature was 2°C higher than the temperature recorded before sunrise. Overall, the current findings suggest that body surface temperature, rather than core body temperature was strongly associated with shade-seeking behaviour in dairy buffaloes. These findings could be useful in developing strategies to mitigate the effects of heat stress in dairy buffalo herds and thereby improve animal welfare.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":" ","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140891901","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

Genotypic insights to Panton-Valentine leukocidin positive methicillin-resistant Staphylococcus aureus isolated from cattle mastitis. 对从牛乳腺炎中分离出的潘通-瓦伦丁白细胞介素阳性耐甲氧西林金黄色葡萄球菌基因型的认识。

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-05-06 DOI: 10.1017/S0022029924000244

Muhammad Ijaz, Nauman Zaheer Ghumman, Muhammad Umar Javed, Arslan Ahmed, Hamza Rasheed, Farwa Anwaar, Muhammad Jawad Sabir, Iqra Muzammil

引用次数: 0

Impact of parity number, milk production and somatic cell count on the reproduction of Holstein cows - ERRATUM. 奇数、产奶量和体细胞数对荷斯坦奶牛繁殖的影响 - ERRATUM。

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-05-06 DOI: 10.1017/S0022029924000177

Bianca Letícia Barbosa, Victor Breno Pedrosa, Luciana da Silva Leal Karolewski, Caio César de Godoi, Adriana de Souza Martins

引用次数: 0

Implementation of hazard analysis and critical control point (HACCP) in yogurt production 在酸奶生产中实施危害分析和关键控制点 (HACCP)

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-04-22 DOI: 10.1017/s0022029924000232

Ramin Aslani, Yeganeh Mazaheri, Maryam Jafari, Parisa Sadighara, Ebrahim Molaee-aghaee, Sibel Ozcakmak, Zahra Reshadat

引用次数: 0

Effects of feeding pasteurized waste milk or saleable milk to calves on weight, health and fecal Escherichia coli antimicrobial resistance 给犊牛喂食巴氏杀菌废奶或可出售牛奶对体重、健康和粪便中大肠埃希氏菌抗菌性的影响

IF 2.1 3区农林科学

Journal of Dairy Research Pub Date : 2024-04-19 DOI: 10.1017/s0022029924000219

Ivana Cellone, Norma Russi, Luis F. Calvinho, Marcelo Signorini, Ana Molineri

{"title":"Effects of feeding pasteurized waste milk or saleable milk to calves on weight, health and fecal Escherichia coli antimicrobial resistance","authors":"Ivana Cellone, Norma Russi, Luis F. Calvinho, Marcelo Signorini, Ana Molineri","doi":"10.1017/s0022029924000219","DOIUrl":"https://doi.org/10.1017/s0022029924000219","url":null,"abstract":"The aim of this study was to compare the effects of feeding pasteurized waste milk or saleable milk to calves on weight, health and emergence of antimicrobial resistance in Escherichia coli strains isolated from those calves. An experimental study under field conditions on a commercial pasture-based Argentinian dairy farm was carried out. Forty Holstein calves were assigned randomly to either pasteurized waste milk (PWM) or non-pasteurized saleable milk (SM). The antimicrobial agents (AM) used on the farm, both to treat or prevent diseases, were recorded. The passive immunity level, calf live weight, AM presence in milk, clinical examination of calves, and E. coli isolation and identification, were performed. A total of 258 E. coli strains were isolated from fecal samples (132 isolates from SM calves and 126 from PWM calves at six sampling times). All E. coli isolated were used to perform AM susceptibility tests (disc diffusion and agar dilution). No differences were observed between groups in health parameters, average daily gain or prevalence of resistant E. coli strains to any AM evaluated throughout the study. Peaks of trimethoprim, sulfamethoxazole and enrofloxacin minimum inhibitory concentration (MIC) were observed at 30 d in E. coli from both groups of calves, whilst additional peaks to tetracyclin and ampicillin were observed only in SM calves. All MIC apart from gentamicin decreased at 75 and 90 d of age (during the weaning period). Gentamicin MIC behaved differently, having no peaks and increasing at 90 d only in PWM group. In conclusion, we found no evidence that emergence of antibiotic resistance is related to the consumption of pasteurized waste milk.","PeriodicalId":15615,"journal":{"name":"Journal of Dairy Research","volume":"98 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140629410","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