The Bovine practitioner最新文献_第10页

Evaluation of an Air-Powered Vaccine Delivery System 空气动力疫苗输送系统的评价

The Bovine practitioner Pub Date : 2019-08-07 DOI: 10.21423/bovine-vol1993no27p47-49

A. Edwards, G. Stokka

引用次数: 1

Advances in Bovine Digital Diseases 牛数字疾病研究进展

The Bovine practitioner Pub Date : 2019-08-07 DOI: 10.21423/bovine-vol1993no27p23-27

A. D. Weaver

引用次数: 1

Symposium on Bovine Digital Problems 牛数字问题专题讨论会

The Bovine practitioner Pub Date : 2019-08-07 DOI: 10.21423/bovine-vol1993no27p28-31

A. D. Weaver

引用次数: 0

Dairy cow mortality data management: the dairy certificate of death 奶牛死亡率数据管理:奶牛死亡证明

The Bovine practitioner Pub Date : 2019-07-29 DOI: 10.21423/bovine-vol51no1p64-72

C. McConnel, F. Garry

引用次数: 9

Xylazine sedation and gunshot for depopulation of cattle 二甲肼镇静和枪决对牛种群减少的影响

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/BOVINE-VOL53NO2P166-168

C. Hanthorn, M. Sanderson

引用次数: 0

Effect of live yeast (Saccharomyces cerevisiae boulardii CNCM I-1079) feed additive on health and growth parameters of high-risk heifers in a commercial feedlot 活酵母(Saccharomyces cerevisiae blardii CNCM I-1079)饲料添加剂对商业饲养场高风险母牛健康和生长参数的影响

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/BOVINE-VOL53NO2P117-127

M. Theurer, J. Fox, A. Aguilar, Henson Nielsen, J. Simpson, T. Lawrence

{"title":"Effect of live yeast (Saccharomyces cerevisiae boulardii CNCM I-1079) feed additive on health and growth parameters of high-risk heifers in a commercial feedlot","authors":"M. Theurer, J. Fox, A. Aguilar, Henson Nielsen, J. Simpson, T. Lawrence","doi":"10.21423/BOVINE-VOL53NO2P117-127","DOIUrl":"https://doi.org/10.21423/BOVINE-VOL53NO2P117-127","url":null,"abstract":"Saccharomyces cerevisiae boulardii CNCM I-1079 (live yeast; ProTernative®, Lallemand Animal Nutrition) was evaluated for effects on health and performance in high-risk feeder heifers. A total of 1,274 beef heifers (average body weight = 547 ± 28.7 lb; 248 ± 13.0 kg) were procured from auction markets in the southern United States. Heifers were randomly assigned to 1 of 2 treatments: 1) Control (CON; no yeast products) or 2) ProTernative® (PRO) fed at 1 gram/hd/day to provide 20 x 109 CFU/hd/day for the first 45 days-on-feed (8 pens/treatment). After 45 days-on-feed, PRO was removed from the diet and both the PRO and CON treatment groups were fed the same basal diets throughout the rest of finishing. Feeding PRO during the first 45 days decreased bovine respiratory disease first treatment 28.4% compared to CON (P=0.01), and improved average daily gain (P=0.05; +4.5%), feed:gain (P=0.02; -5.0%), cost of gain (P=0.04; -4.7%), percentage USDA quality grade Choice (P<0.01; +6.8%), and reduced A+ liver abscesses (P<0.01; -45.9%). Carcass weight and percentage USDA Choice carcasses decreased (P<0.01) concomitant with increased (P<0.01) percentage USDA Select carcasses as the number of times treated for bovine respiratory disease increased. Addition of PRO to the ration during the first 45 days improved health, performance, and carcass outcomes through closeout in high-risk feeder heifers.","PeriodicalId":22281,"journal":{"name":"The Bovine practitioner","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87986132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Case Report - Chronic oak toxicity (Quercus suber) in beef cattle in the south of Portugal 病例报告-葡萄牙南部肉牛慢性橡树毒性(栎属)

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/BOVINE-VOL53NO2P170-176

C. Frias, P. Simões, J. Cota, H. Pissarra, T. P. Nunes, C. Hjerpe, M. S. Lima

引用次数: 1

Single-use hypodermic needles and obstetric sleeves failed to reduce bovine leukemia virus transmission in three dairy herds 在三个奶牛群中，一次性皮下注射针头和产科套未能减少牛白血病病毒的传播

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/BOVINE-VOL53NO2P128-133

V. J. Ruggiero, P. Bartlett

{"title":"Single-use hypodermic needles and obstetric sleeves failed to reduce bovine leukemia virus transmission in three dairy herds","authors":"V. J. Ruggiero, P. Bartlett","doi":"10.21423/BOVINE-VOL53NO2P128-133","DOIUrl":"https://doi.org/10.21423/BOVINE-VOL53NO2P128-133","url":null,"abstract":"The objective of this study was to determine the utility of single-use hypodermic needles and reproductive examination sleeves in reducing the transmission of bovine leukemia virus (BLV) in dairy herds. Numerous epidemiological studies have identified re-use of needles and exam sleeves as significant risk factors for BLV, therefore adopting a practice of single-use needles and sleeves is a commonly suggested management change for reducing BLV transmission. We conducted a field trial on 3 midwestern commercial dairy herds that had not been employing single use of needles or sleeves as part of their herd health protocol. Additionally, each of the herds had a BLV prevalence among adult cows of at least 20%. BLV milk-ELISA negative cows were randomly assigned to always receive a new single-use needle and new exam sleeve (intervention group). We also monitored and tested BLV milk-ELISA negative cows that received the standard management practice of needles and sleeves that were shared with ELISA-positive herd mates (controls). Cumulative incidence of new infections was determined by semiannual BLV milk-ELISA testing. The cumulative incidence of new BLV infections was not statistically different between the 2 groups. Medical hygiene to prevent bloodborne transmission is still recommended, but in these 3 herds, re-use of needles and sleeves did not appear to be a major route of BLV transmission.","PeriodicalId":22281,"journal":{"name":"The Bovine practitioner","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80659703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Effect of distal splitting the scrotum when banding feedlot bulls on performance outcomes and healing time 系带时远端切开阴囊对公牛生产性能和愈合时间的影响

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/bovine-vol53no2p160-165

M. Theurer, J. Fox, Travis M. McCarty, Ryan M. McCollum, Clyde D. Cranwell

{"title":"Effect of distal splitting the scrotum when banding feedlot bulls on performance outcomes and healing time","authors":"M. Theurer, J. Fox, Travis M. McCarty, Ryan M. McCollum, Clyde D. Cranwell","doi":"10.21423/bovine-vol53no2p160-165","DOIUrl":"https://doi.org/10.21423/bovine-vol53no2p160-165","url":null,"abstract":"Castration of bulls using high tension banding techniques is a common practice in commercial feedlots. The objective of this study was to evaluate whether splitting the scrotum at time of banding would impact performance and healing times in feedlot bulls. A total of 32 bulls from a single breeding operation were blocked by initial body weight and then randomly assigned to intact (n = 16) or split (n = 16) treatment groups. A Newberry knife was used to make a 3-inch (7.6 cm) side-to-side incision through the distal scrotum immediately after banding bulls in the split treatment group. Bulls in the intact group were banded, but no incision was made in the scrotum. Individual weights were collected on days 14, 28, and 56, and the scrotum was visually assessed at each weigh point. More (37.5%) scrotums were absent on day 28 (P=0.03), and ADG was improved at day 56 (P=0.06) in the split treatment group compared to intact treatment group. Follow up studies evaluating the inflammatory response, health, and performance outcomes are warranted to further evaluate the process of splitting the scrotum at the time of band castration.","PeriodicalId":22281,"journal":{"name":"The Bovine practitioner","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89261455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Performance of a milk leukocyte differential test for decision-making in a selective dry cow therapy program 乳白细胞鉴别试验在选择性干牛治疗方案决策中的表现

The Bovine practitioner Pub Date : 2019-06-01 DOI: 10.21423/BOVINE-VOL53NO2P150-159

J. Denis-Robichaud, R. Almeida, S. Ivey, R. Rodríguez, M. Payne, K. Leslie, M. Hockett

{"title":"Performance of a milk leukocyte differential test for decision-making in a selective dry cow therapy program","authors":"J. Denis-Robichaud, R. Almeida, S. Ivey, R. Rodríguez, M. Payne, K. Leslie, M. Hockett","doi":"10.21423/BOVINE-VOL53NO2P150-159","DOIUrl":"https://doi.org/10.21423/BOVINE-VOL53NO2P150-159","url":null,"abstract":"The objectives of this study were 1) to determine the operating characteristics of a commercial milk leukocyte differential (MLD) test to detect intramammary infections in quarters of late-lactation dairy cows as compared to bacteriological culture and 2) to evaluate the milk production and udder health parameters between cows treated following blanket vs selective dry cow therapy (DCT) using the MLD test results. In a first experiment, the MLD test was compared to the bacteriological culture results (gold standard) of 363 quarters from 94 cows. The sensitivity, specificity, and predictive values for the identification of infection using the MLD test were determined. Sensitivity ranged from 44% to 77%, and specificity from 54% to 92%. In the second experiment blanket DCT was compared to selective DCT based on the results of MLD test, and treating only positive quarters; a total of 328 cows were randomly assigned to 1 of the 2 treatment groups. The proportion of quarters positive to bacteriological culture, and the incidence rate of moderate and severe cases of clinical mastitis events, did not differ between treatment groups. Results of these experiments provide information to support decision-making in a selective DCT program in low-SCC herds using the MLD test.","PeriodicalId":22281,"journal":{"name":"The Bovine practitioner","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90751700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2