152 results on '"Steeneveld, Wilma"'
Search Results
2. Associations between dairy farm performance indicators and culling rates under policy-driven herd size constraints.
- Author
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Kulkarni, Pranav, Mourits, Monique, Nielen, Mirjam, and Steeneveld, Wilma
- Subjects
fertility ,herd characteristics ,longevity ,performance ,phosphate ,primiparous cows ,replacement ,udder health - Abstract
INTRODUCTION: This article aimed to study cross-sectional associations between the performance of dairy farms and their corresponding culling proportions under the herd size constraint as imposed in 2018 by the new phosphate regulation in the Netherlands. METHODS: To this end, production data from 10,540 Dutch dairy farms were analyzed to capture the inflow and outflow of both primiparous and multiparous cows. Farm performance was measured by 10 indicators structured in four areas of longevity, production, reproduction, and udder health. Farm culling proportions were represented by the overall culling (OC) and the number of culled primiparous cows in relation to (i) the total number of producing cows (PC), (ii) the number of producing primiparous cows (PPC), and (iii) the number of culled producing cows (POC). Spearmans rank correlation and weighted logistic regression were adopted to study associations. RESULTS: In 2018, on average, 28% of producing cows were culled (OC). The number of primiparous cows culled represented 4.5% of the total number of producing cows (PC) and the mean proportion of culled primiparous cows was 18.8% of the total number of producing primiparous cows (PPC), and, of the total number of producing culled cows, 15% were primiparous cows (POC). However, the variance around the mean, and among individual farms, was high (SD 4-15% for all four culling proportions). Results from rank correlation showed very low-rank conformity (
- Published
- 2023
3. The economic impact of endemic respiratory disease in pigs and related interventions - a systematic review
- Author
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Boeters, Marloes, Garcia-Morante, Beatriz, van Schaik, Gerdien, Segalés, Joaquim, Rushton, Jonathan, and Steeneveld, Wilma
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- 2023
- Full Text
- View/download PDF
4. Quantifying cost of disease in livestock: a new metric for the Global Burden of Animal Diseases
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Gilbert, William, primary, Marsh, Thomas L, additional, Chaters, Gemma, additional, Jemberu, Wudu T, additional, Bruce, Mieghan, additional, Steeneveld, Wilma, additional, Afonso, Joao S, additional, Huntington, Benjamin, additional, and Rushton, Jonathan, additional
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- 2024
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5. Economic impacts of constrained replacement heifer supply in dairy herds
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Kulkarni, Pranav S., Haijema, Rene, Hogeveen, Henk, Steeneveld, Wilma, Mourits, Monique C.M., Kulkarni, Pranav S., Haijema, Rene, Hogeveen, Henk, Steeneveld, Wilma, and Mourits, Monique C.M.
- Abstract
CONTEXT: In recent years, environmental policies, especially in North-western European countries have put pressure on the total livestock on a dairy farm. On closed dairy farms this primarily has resulted in a reduction of the heifer rearing unit to maintain the production unit. The economic consequences of constrained replacement heifer supply on herd level have not been investigated. OBJECTIVE: The objective of this study is to study on herd level the economic impact of suboptimal replacement decisions due to a constrained replacement heifer supply. METHODS: In this study, we combine a single-cow MDP (Markov Decision Process) optimization model with dairy herd dynamics simulation of 10 years to account for the interdependency among dairy cows within the herd of 100 cows. Besides the base scenario of following optimal replacement policy, we simulated three input scenarios of constrained, excess, and variable replacement heifer supply. RESULTS AND CONCLUSION: In the base scenario, optimal replacement policy resulted in a herd gross margin of €155,108, 11% voluntary replacement rate, 24% involuntary disposal rate annually for a herd of 100 cows. Constrained as well as excess heifer supply resulted in lower gross margins of €85,878 and €138,406 respectively, compared to the base scenario. Constrained heifer supply also resulted in 39% reduction of herd size, involuntary disposal of 17.5% and no voluntary replacements (0.1%) on average per year. Variable heifer supply scenario resulted in lower gross margins (€115,127), lower voluntary replacement rate (4%), highest involuntary disposal rate (28%) but did not result in reduction of herd size, compared to the base scenario. In conclusion, we developed a combination of cow level optimization with a herd level simulation to study the economic impacts of constrained replacement heifer supply. We found that severely constrained, excess, and variable heifer supply result in reduced herd average gross margin. SIGNIFICANCE: Op
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- 2024
6. Quantifying cost of disease in livestock: a new metric for the Global Burden of Animal Diseases
- Author
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FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Gilbert, William, Marsh, Thomas L., Chaters, Gemma, Jemberu, Wudu T., Bruce, Mieghan, Steeneveld, Wilma, Afonso, Joao S., Huntington, Benjamin, Rushton, Jonathan, FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Gilbert, William, Marsh, Thomas L., Chaters, Gemma, Jemberu, Wudu T., Bruce, Mieghan, Steeneveld, Wilma, Afonso, Joao S., Huntington, Benjamin, and Rushton, Jonathan
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- 2024
7. Economic impacts of constrained replacement heifer supply in dairy herds
- Author
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FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Kulkarni, Pranav S., Haijema, Rene, Hogeveen, Henk, Steeneveld, Wilma, Mourits, Monique C.M., FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Kulkarni, Pranav S., Haijema, Rene, Hogeveen, Henk, Steeneveld, Wilma, and Mourits, Monique C.M.
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- 2024
8. Prediction of persistency for day 305 of lactation at the moment of the insemination decision
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Chen, Yongyan, primary, Steeneveld, Wilma, additional, Nielen, Mirjam, additional, and Hostens, Miel, additional
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- 2023
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9. Milk β-hydroxybutyrate metrics and its consequences for surveillance of hyperketonaemia on commercial dairy farms
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De Jong, Elise, primary, Rijpert-Duvivier, Angelique, additional, Veldman, Hendrik, additional, Steeneveld, Wilma, additional, and Jorritsma, Ruurd, additional
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- 2023
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10. The DECIDE project: from surveillance data to decision-support for farmers and veterinarians
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van Schaik, Gerdien, primary, Hostens, Miel, additional, Faverjon, Céline, additional, Jensen, Dan B., additional, Kristensen, Anders R., additional, Ezanno, Pauline, additional, Frössling, Jenny, additional, Dórea, Fernanda, additional, Jensen, Britt-Bang, additional, Carmo, Luis Pedro, additional, Steeneveld, Wilma, additional, Rushton, Jonathan, additional, Gilbert, William, additional, Bearth, Angela, additional, Siegrist, Michael, additional, Kaler, Jasmeet, additional, Ripperger, Johannes, additional, Siehler, Jamuna, additional, de Wit, Sjaak, additional, Garcia-Morante, Beatriz, additional, Segalés, Joaquim, additional, Pardon, Bart, additional, Bokma, Jade, additional, and Nielen, Mirjam, additional
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- 2023
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11. Editorial: Proceedings of the 5th ISESSAH conference 2021: economics and social sciences applied to livestock and aquaculture health
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Indrawan, Dikky, primary, Mohd Nor, Norhariani, additional, Vosough Ahmadi, Bouda, additional, Raboisson, Didier, additional, Pendell, Dustin L., additional, Buda, Mark, additional, Kamarulzaman, Nitty Hirawaty, additional, Steeneveld, Wilma, additional, Rushton, Jonathan, additional, and Hogeveen, Henk, additional
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- 2023
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12. Associations between dairy farm performance indicators and culling rates under policy-driven herd size constraints
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Kulkarni, Pranav Shrikant, primary, Mourits, Monique, additional, Nielen, Mirjam, additional, and Steeneveld, Wilma, additional
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- 2023
- Full Text
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13. Associations between dairy farm performance indicators and culling rates under policy-driven herd size constraints
- Author
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FAH Evidence based Veterinary Medicine, Kulkarni, Pranav Shrikant, Mourits, Monique, Nielen, Mirjam, Steeneveld, Wilma, FAH Evidence based Veterinary Medicine, Kulkarni, Pranav Shrikant, Mourits, Monique, Nielen, Mirjam, and Steeneveld, Wilma
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- 2023
14. The DECIDE project: from surveillance data to decision-support for farmers and veterinarians
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FAH Evidence based Veterinary Medicine, FAH GZ herkauwer, FAH veterinaire epidemiologie, Schaik, Gerdien van, Hostens, Miel, Faverjon, Céline, Jensen, Dan B., Kristensen, Anders R., Ezanno, Pauline, Frössling, Jenny, Dórea, Fernanda, Jensen, Britt-Bang, Carmo, Luis Pedro, Steeneveld, Wilma, Rushton, Jonathan, Gilbert, William, Bearth, Angela, Siegrist, Michael, Kaler, Jasmeet, Ripperger, Johannes, Siehler, Jamuna, Wit, Sjaak de, Garcia-Morante, Beatriz, Segalés, Joaquim, Pardon, Bart, Bokma, Jade, Nielen, Mirjam, FAH Evidence based Veterinary Medicine, FAH GZ herkauwer, FAH veterinaire epidemiologie, Schaik, Gerdien van, Hostens, Miel, Faverjon, Céline, Jensen, Dan B., Kristensen, Anders R., Ezanno, Pauline, Frössling, Jenny, Dórea, Fernanda, Jensen, Britt-Bang, Carmo, Luis Pedro, Steeneveld, Wilma, Rushton, Jonathan, Gilbert, William, Bearth, Angela, Siegrist, Michael, Kaler, Jasmeet, Ripperger, Johannes, Siehler, Jamuna, Wit, Sjaak de, Garcia-Morante, Beatriz, Segalés, Joaquim, Pardon, Bart, Bokma, Jade, and Nielen, Mirjam
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- 2023
15. Prediction of persistency for day 305 of lactation at the moment of the insemination decision
- Author
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FAH Evidence based Veterinary Medicine, FAH GZ herkauwer, FAH – Veterinary Epidemiology, FAH – Sustainable Ruminant Health, Chen, Yongyan, Steeneveld, Wilma, Nielen, Mirjam, Hostens, Miel, FAH Evidence based Veterinary Medicine, FAH GZ herkauwer, FAH – Veterinary Epidemiology, FAH – Sustainable Ruminant Health, Chen, Yongyan, Steeneveld, Wilma, Nielen, Mirjam, and Hostens, Miel
- Published
- 2023
16. The economic impact of endemic respiratory disease in pigs and related interventions - a systematic review
- Author
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FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Boeters, Marloes, Garcia-Morante, Beatriz, van Schaik, Gerdien, Segalés, Joaquim, Rushton, Jonathan, Steeneveld, Wilma, FAH Evidence based Veterinary Medicine, FAH – Veterinary Epidemiology, Boeters, Marloes, Garcia-Morante, Beatriz, van Schaik, Gerdien, Segalés, Joaquim, Rushton, Jonathan, and Steeneveld, Wilma
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- 2023
17. Associations between dairy farm performance indicators and culling rates under policy-driven herd size constraints
- Author
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Kulkarni, Pranav Shrikant, Mourits, Monique, Nielen, Mirjam, Steeneveld, Wilma, Kulkarni, Pranav Shrikant, Mourits, Monique, Nielen, Mirjam, and Steeneveld, Wilma
- Abstract
Introduction: This article aimed to study cross-sectional associations between the performance of dairy farms and their corresponding culling proportions under the herd size constraint as imposed in 2018 by the new phosphate regulation in the Netherlands. Methods: To this end, production data from 10,540 Dutch dairy farms were analyzed to capture the inflow and outflow of both primiparous and multiparous cows. Farm performance was measured by 10 indicators structured in four areas of longevity, production, reproduction, and udder health. Farm culling proportions were represented by the overall culling (OC) and the number of culled primiparous cows in relation to (i) the total number of producing cows (PC), (ii) the number of producing primiparous cows (PPC), and (iii) the number of culled producing cows (POC). Spearman's rank correlation and weighted logistic regression were adopted to study associations. Results: In 2018, on average, 28% of producing cows were culled (OC). The number of primiparous cows culled represented 4.5% of the total number of producing cows (PC) and the mean proportion of culled primiparous cows was 18.8% of the total number of producing primiparous cows (PPC), and, of the total number of producing culled cows, 15% were primiparous cows (POC). However, the variance around the mean, and among individual farms, was high (SD 4–15% for all four culling proportions). Results from rank correlation showed very low-rank conformity (<12%) between the areas of production, reproduction, and udder health to the culling proportions. Results from logistic regression showed that higher farm levels of production and higher percentages of cows with poor udder health were associated with more overall culling but with less primiparous culling. For reproduction indicators, the associations were similar for overall and primiparous culling. However, except for the average age of culled animals, the odds ratios for indicators were close to 1 (range: 0.92–1.07 and
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- 2023
18. Editorial: Proceedings of the 5th ISESSAH conference 2021: economics and social sciences applied to livestock and aquaculture health
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Indrawan, Dikky, Mohd Nor, Norhariani, Vosough Ahmadi, Bouda, Raboisson, Didier, Pendell, Dustin L., Buda, Mark, Kamarulzaman, Nitty Hirawaty, Steeneveld, Wilma, Rushton, Jonathan, Hogeveen, Henk, Indrawan, Dikky, Mohd Nor, Norhariani, Vosough Ahmadi, Bouda, Raboisson, Didier, Pendell, Dustin L., Buda, Mark, Kamarulzaman, Nitty Hirawaty, Steeneveld, Wilma, Rushton, Jonathan, and Hogeveen, Henk
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- 2023
19. Hormone use for reproductive diseases and heat induction in relation to herd-level reproductive performance in Dutch dairy farms
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Wicaksono, Ardilasunu, van den Borne, Bart H.P., Steeneveld, Wilma, van Werven, Tine, Hogeveen, Henk, Wicaksono, Ardilasunu, van den Borne, Bart H.P., Steeneveld, Wilma, van Werven, Tine, and Hogeveen, Henk
- Abstract
This ecological study aimed to associate hormone use for reproductive diseases and heat induction with reproductive performance at herd level. Hormone use, herd characteristics, and test-day recording data were obtained from 754 representative Dutch dairy farms belonging to five large veterinary practices from 2017 to 2019 (1679 observations in total). Hormone use was classified into prostaglandin, gonadotropin-releasing hormone (GnRH), and progesterone, and was expressed at herd level as the annual number of hormone doses per 100 adult dairy cows. Hormone use was categorized into four levels (no usage, low, medium, and high use), following the 33rd and 66th percentiles of herds that applied them. Three herd-level reproductive performance indicators (calving interval, calving-to-1st insemination interval, number of inseminations per cow) were analyzed using multivariable General Estimating Equations models. The median annual total hormone use was 36.1 (mean=43.1; min=0.0; max=248.2) doses per 100 adult dairy cows in all herds while the median was 39.2 (mean=46.8; min=0.4; max=248.2) doses per 100 adult dairy cows among the user-herds. The median annual group-specific hormone use was 21.3 (mean=26.1; min 0.0; max=180.0), 11.0 (mean=15.3; min=0.0; max=127.0) and 0.0 (mean=1.8; min=0.0; max=40.3) doses per 100 adult dairy cows for prostaglandin, GnRH, and progesterone, respectively. The final statistical models identified that herds with a high hormone use had a calving interval and a calving-to-1st insemination interval that was 9.3 ± 2.6 and 16.4 ± 2.1 days shorter than that of non-user herds (424.0 ± 2.7 and 114.0 ± 2.1 days), respectively. Furthermore, high-user herds needed on average 0.3 ± 0.04 inseminations more to get their cows pregnant compared to non-user herds (1.83 ± 0.04 no. of inseminations per cow). Medium-user herds had a 6.5 ± 2.6 days shorter calving interval and a 12.0 ± 2.1 days shorter calving-to-1st insemination interval with 0.2 ± 0.04 additiona
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- 2023
20. The association of herd performance indicators with dairy cow longevity: An empirical study
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Han, Ruozhu, primary, Mourits, Monique, additional, Steeneveld, Wilma, additional, and Hogeveen, Henk, additional
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- 2022
- Full Text
- View/download PDF
21. Linear Mixed-Effects Model to Quantify the Association between Somatic Cell Count and Milk Production in Italian Dairy Herds
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Luo, Tiantian, primary, Steeneveld, Wilma, additional, Nielen, Mirjam, additional, Zanini, Lucio, additional, and Zecconi, Alfonso, additional
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- 2022
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22. Dutch dairy farmers' perspectives on culling reasons and strategies
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Kulkarni, Pranav Shrikant, Mourits, Monique (MCM), Slob, Jasmijn, Veldhuis, Anouk (AMB), Nielen, Mirjam, Hogeveen, Henk, van Schaik, Gerdien, and Steeneveld, Wilma
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culling ,longevity ,dairy ,reasons ,survey ,intentions - Abstract
Supplementary information/ material for manuscript titled "Dutch dairy farmers’ perspectives on culling reasons and strategies"
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- 2022
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23. Herd level economic comparison between the shape of the lactation curve and 305 d milk production
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Chen, Yongyan, Hostens, Miel, Nielen, Mirjam, Ehrlich, Jim, Steeneveld, Wilma, FAH GZ herkauwer, FAH Evidence based Veterinary Medicine, FAH GZ herkauwer, and FAH Evidence based Veterinary Medicine
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herd aggregation ,General Veterinary ,dairy ,economics ,milk production ,veterinary(all) ,lactation curve - Abstract
Herd milk production performance is generally evaluated using the herd's average 305-day milk production (HM305). Economic comparisons between herds are also often made using HM305. Comparing herds is thus based on summarized milk production, and not on the form of the lactation curves of the cows within the herd. Cow lactation curve characteristics can be aggregated on a calendar year basis to herd lactation curve characteristics (HLCC) (herd magnitude, herd time to peak yield and herd persistency). Thus far, no literature has evaluated whether the shape of the lactation curve (described by HLCC) is better able to explain the economic variation of herds than summarized milk production such as HM305 does. This study aims to determine whether HM305 or HLCC is better able to explain the variation in economic performance between herds. To do so, we evaluated 8 years of Dutch longitudinal data on milk production and the financial accounts of 1,664 herds. Cow lactation curve characteristics were calculated through lactation curve modeling and aggregated to HLCC on a calendar year basis for two parity groups (primiparous cows and multiparous cows). Using income over feed cost per cow (IOFC-cow) or per 100 kg milk (IOFC-milk) as the dependent variable separately, we developed four linear mixed models. Two models were used to analyse the association between herd economic performance and HLCC; the other two models were used to analyse the association between herd economic performance and HM305. A Cox test and J test were used to compare two non-nested models to investigate whether HM305 or HLCC better explain IOFC. The average IOFC-cow was €2,305 (SD = 408) per year, while the average IOFC-milk was €32.1 (SD = 4.6). Results showed that HLCC and HM305 explain the same amount of variance of IOFC-cow or IOFC-milk. IOFC-cow was associated with HM305 and HLCC (except herd time to peak yield for primiparous cows). Herd magnitude was most strongly associated with IOFC-cow, followed by herd persistency and herd time to peak yield of multiparous cows. IOFC-milk was not associated with HM305 or HLCC (except for a weak negative association with herd persistency for primiparous cows). IOFC-cow and IOFC-milk were driven most by time effects. In conclusion, HLCC and HM305 explain the same amount of variance in IOFC-cow or IOFC-milk. HLCC is more computationally expensive, while HM305 is more readily available.
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- 2022
24. Estimating the Effect of a Bovine Viral Diarrhea Virus Control Program: An Empirical Study on the Performance of Dutch Dairy Herds
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Yue, Xiaomei, primary, Wu, Jingyi, additional, van der Voort, Mariska, additional, Steeneveld, Wilma, additional, and Hogeveen, Henk, additional
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- 2022
- Full Text
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25. A stochastic modelling approach to determine the effect of diverse Staphylococcus aureus strains on the economic and epidemiological outcomes of mastitis intervention strategies in dairy cattle
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FAH veterinaire epidemiologie, dFAH AVR, dFAH I&I, FAH Evidence based Veterinary Medicine, Exel, Catharina E, Halasa, Tariq, Koop, Gerrit, Steeneveld, Wilma, Lam, Theo J G M, Benedictus, Lindert, Gussmann, Maya, FAH veterinaire epidemiologie, dFAH AVR, dFAH I&I, FAH Evidence based Veterinary Medicine, Exel, Catharina E, Halasa, Tariq, Koop, Gerrit, Steeneveld, Wilma, Lam, Theo J G M, Benedictus, Lindert, and Gussmann, Maya
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- 2022
26. Correlations between the different aspects of ketosis dynamics in dairy herds in the Benelux by using BHB-measurements in milk from the DeLaval Herd NavigatorTM.
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Heitkamp, Wouter, Steeneveld, Wilma (Thesis Advisor), A. Rijpert-Duvivier (Elanco Animal Health, Netherlands), W. Steeneveld (University Utrecht) & H. Veldman (DeLaval), Heitkamp, Wouter, Steeneveld, Wilma (Thesis Advisor), and A. Rijpert-Duvivier (Elanco Animal Health, Netherlands), W. Steeneveld (University Utrecht) & H. Veldman (DeLaval)
- Abstract
BHB-concentrations is mostly used for detection hyperketonaemia. Most studies applied BHB-concentrations in blood and a few studies have used BHB-measurements in milk. On-set, duration and maximum BHB-concentrations are different aspects of ketosis dynamics. The aim of this study is to investigate how different parameters of ketosis dynamics correlate with each other and the second objective of this study is to investigate if the severity of keto-sis can be reflected in an area under the curve of the repeated BHB-measurements in milk detected with the DeLaval Herd NavigatorTM. Within the Herd Navigator an inline sampler inside the AMS automatically takes a representative sample of 80 ml milk from each indi-vidual cow during the milking process and measures BHB-concentrations at least daily from 3 to 20 days in milk and between 21 and 60 days in milk at least once every 4 days. The in-vestigated data, provided by Lattec, which included 48 herds working with the Herd Naviga-tor in the Benelux in June 2020. Data of unique calving’s between July 2018 and August 2019 were included. The final dataset included 130,247 BHB-measurements of 4030 unique calving’s. The cur-rent study defined three aspects of ketosis dynamics: the onset of ketosis, the duration of ke-tosis and the maximum BHB-concentration. Descriptive statistics were performed of the dif-ferent aspects of ketosis. Mean onset of ketosis was 18 DIM, 15 DIM and 12 DIM for cows with parity 1, 2 and 3+ respectively. Mean duration of ketosis was 21 days for cows with parity 1, 27 days parity 2 cows and 32 days for cows with parity 3+. The correlation between the onset of ketosis and the duration of ketosis was -0.546 (parity 2 cows), the correlation between the duration and maximum BHB-concentration was 0.460 (parity 2 cows). The area under the curve is calculated as a sum of all BHB-measurements between 3 and 60 DIM. The mean area under the curve was 3,67 for parity 1 cows, 4,14 for parity 2 cows and 4,63 for parity
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- 2022
27. Linear Mixed-Effects Model to Quantify the Association between Somatic Cell Count and Milk Production in Italian Dairy Herds
- Author
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FAH Evidence based Veterinary Medicine, Luo, Tiantian, Steeneveld, Wilma, Nielen, Mirjam, Zanini, Lucio, Zecconi, Alfonso, FAH Evidence based Veterinary Medicine, Luo, Tiantian, Steeneveld, Wilma, Nielen, Mirjam, Zanini, Lucio, and Zecconi, Alfonso
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- 2022
28. Herd level economic comparison between the shape of the lactation curve and 305 d milk production
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FAH GZ herkauwer, FAH Evidence based Veterinary Medicine, Chen, Yongyan, Hostens, Miel, Nielen, Mirjam, Ehrlich, Jim, Steeneveld, Wilma, FAH GZ herkauwer, FAH Evidence based Veterinary Medicine, Chen, Yongyan, Hostens, Miel, Nielen, Mirjam, Ehrlich, Jim, and Steeneveld, Wilma
- Published
- 2022
29. The association of herd performance indicators with dairy cow longevity : An empirical study
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Han, Ruozhu, Mourits, Monique, Steeneveld, Wilma, Hogeveen, Henk, Han, Ruozhu, Mourits, Monique, Steeneveld, Wilma, and Hogeveen, Henk
- Abstract
The associations between reproductive performance, milk yield and health status with the risk of culling, and thus with a cow’s longevity, have been well documented at the individual cow level. Associations at individual cow level may, however, not be valid at herd level due to interrelated herd management aspects and/or policy restrictions. The objective of this study was to explore the association of herd performance indicators with herd-level dairy cow longevity under Dutch production conditions. Longevity was expressed by three different measures, viz. age at culling, lifetime milk production of culled cows and culling rate. The evaluated herd performance indicators included factors on milk production, youngstock rearing, reproduction and health performance as registered on 10 719 Dutch commercial dairy herds during the period 2007–2016. Averaged over herds and the evaluated period, the age of culled milking cows was 2 139 days (5.8 years, SD±298 days), the lifetime milk production of culled cows was 31 238 kg (SD±7,494 kg), and the culling rate was 0.24 (SD ±0.08). A mixed linear regression modelling approach was applied to evaluate the association of each of the three longevity measures with the selected herd performance indicators. The results indicated that only four herd performance indictors (herd size, herd expansion, heifer ratio and the proportion of cows with potential subclinical ketosis) shared significant associations with all three longevity variables. Generally, the strength of the associations between each of the evaluated longevity measures and herd performance indicators was only limited. The absence of strong associations between the longevity measures and herd performance indicators reveal that there is potential of extending cattle longevity without affecting the herd performance in terms of milk production, reproduction and health. Moreover, only part of the observed variance in longevity among the herds over time was explained by the herd
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- 2022
30. Estimating the Effect of a Bovine Viral Diarrhea Virus Control Program: An Empirical Study on the Performance of Dutch Dairy Herds
- Author
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Yue, Xiaomei, Wu, Jingyi, van der Voort, Mariska, Steeneveld, Wilma, Hogeveen, Henk, Yue, Xiaomei, Wu, Jingyi, van der Voort, Mariska, Steeneveld, Wilma, and Hogeveen, Henk
- Abstract
More and more European countries have implemented a bovine viral diarrhea virus (BVDV) control program. The economic effects of such programs have been evaluated in simulations, but empirical studies are lacking, especially in the final stage of the program. We investigated the economic (gross margin) and production effects (milk yield, somatic cell count, and calving interval) of the herds obtaining BVDV-free certification based on longitudinal annual accounting and herd performance data from Dutch dairy herds between 2014 and 2019, the final stages of the Dutch national BVDV-free program. This study was designed as a case-control study: two types of case herds were defined for two analyses. The case herds in the first analysis are herds where the BVDV status changed from “BVDV not free” to “BVDV free” during the study period. The not-free status refers to a herd that participated in the BVDV-free program but had not yet obtained the BVDV-free certification. In the second analysis, the case herds started participating in the Dutch BVDV-free program during the study period and obtained the BVDV-free certification. Control herds in both analyses were BVDV-free during the entire study period. Potential bias between the covariates of the two herd groups was reduced by matching case and control herds using the propensity score matching method. To compare the differences between case and control herds before and after BVDV-free certification, we used the time-varying Difference-in-Differences estimation (DID) methodology. The results indicate that there was no significant change in milk yield, somatic cell count, calving interval, and gross margin upon BVDV-free certification. There are several possible explanations for the non-significant effects observed in our study, such as the final stage of the BVDV control program, not knowing the true BVDV infection situation in case herds and not knowing if control measures were implemented in case herds prior to participating i
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- 2022
31. A stochastic modelling approach to determine the effect of diverse Staphylococcus aureus strains on the economic and epidemiological outcomes of mastitis intervention strategies in dairy cattle
- Author
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Exel, Catharina E., Halasa, Tariq, Koop, Gerrit, Steeneveld, Wilma, Lam, Theo J.G.M., Benedictus, Lindert, Gussmann, Maya, Exel, Catharina E., Halasa, Tariq, Koop, Gerrit, Steeneveld, Wilma, Lam, Theo J.G.M., Benedictus, Lindert, and Gussmann, Maya
- Abstract
Staphylococcus aureus (S. aureus) strains with considerable genetic and phenotypic differences have previously been identified. The economic and epidemiologic impact of S. aureus mastitis has been investigated, but none of these studies took differences between strains into account. Here we aimed to investigate how differences between S. aureus strains affect the economic and epidemiologic outcome of various intervention strategies against clinical and subclinical intramammary infections. Five S. aureus strains were modelled using a stochastic bio-economic model simulating a dairy herd of 200 cows using single-day time steps. The strain characteristics of the five simulated S. aureus strains (general, contagious, spill-over, clinical and persistent) were based on divergent phenotypes as described in literature. Outcomes of the model included incidence (both clinical and subclinical), number of antibiotic treatment days, number of culled cows, and net income. Intervention strategies against clinical and subclinical intramammary infections were based on (variations of) intramammary antibiotic treatment, testing, and culling. Both single and multiple pathogen (intramammary infection caused by S. aureus, Escherichia coli, and non-aureus staphylococci) scenarios were simulated to determine the effect of the five S. aureus strains on the impact of 19 different intervention strategies. The results showed that the incidence (both clinical and subclinical), number of treatment days, number of culled cows, and net income varied considerably for the different S. aureus strains. Comparison of the model outcomes within and between strains showed that for most intervention strategies the relative impact differed per strain. However, the intervention strategy with the best outcome for most variables and strains was the culling of cows with a recovery probability lower than 50%. This shows that the relative economic and epidemiologic impact of most of the modelled intervention s
- Published
- 2022
32. The effect of new bovine viral diarrhea virus introduction on somatic cell count, calving interval, culling, and calf mortality of dairy herds in the Dutch bovine viral diarrhea virus–free program
- Author
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Yue, Xiaomei, Voort, Mariska van der, Steeneveld, Wilma, Schaik, Gerdien van, Vernooij, Johannes C.M., Duijn, Linda van, Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH Evidence based Veterinary Medicine, and dFAH AVR
- Subjects
Diarrhea ,Veterinary medicine ,viruses ,animal diseases ,Bedrijfseconomie ,Cattle Diseases ,Cell Count ,WASS ,Culling ,Biology ,Virus ,Herd immunity ,03 medical and health sciences ,Business Economics ,Calving interval ,Taverne ,Genetics ,Animals ,control program ,Viral diarrhea ,030304 developmental biology ,calving interval ,0303 health sciences ,culling ,Diarrhea Viruses, Bovine Viral ,somatic cell count ,Diarrhea Virus 1, Bovine Viral ,0402 animal and dairy science ,virus diseases ,04 agricultural and veterinary sciences ,040201 dairy & animal science ,bovine viral diarrhea virus ,Herd ,Bovine Virus Diarrhea-Mucosal Disease ,Cattle ,Female ,Calf mortality ,Animal Science and Zoology ,Somatic cell count ,Food Science - Abstract
Bovine viral diarrhea virus (BVDV) infection has a major effect on the health of cows and consequently on herd performance. Many countries have implemented control or eradication programs to mitigate BVDV infection and its negative effects. These negative effects of BVDV infection on dairy herds are well documented, but there is much less information about the effects of new introduction of BVDV on dairy herds already participating in a BVDV control program. The objective of our study was to investigate the effect of a new BVDV introduction in BVDV-free herds participating in the Dutch BVDV-free program on herd performance. Longitudinal herd-level surveillance data were combined with herd information data to create 4 unique data sets, including a monthly test-day somatic cell count (SCC) data set, annual calving interval (CIV) and culling risk (CR) data sets, and a quarterly calf mortality rate (CMR) data set. Each database contained 2 types of herds: herds that remained BVDV free during the whole study period (defined as free herds), and herds that lost their BVDV-free status during the study period (defined as breakdown herds). The date of losing the BVDV-free status was defined as breakdown date. To compare breakdown herds with free herds, a random breakdown date was artificially generated for free herds by simple random sampling from the distribution of the breakdown month of the breakdown herds. The SCC and CIV before and after a new introduction of BVDV were compared through linear mixed-effects models with a Gaussian distribution, and the CR and CMR were modeled using a negative binomial distribution in generalized linear mixed-effects models. The explanatory variables for all models included herd type, BVDV status, year, and a random herd effect. Herd size was included as an explanatory variable in the SCC, CIV, and CMR model. Season was included as an explanatory variable in the SCC and CMR model. Results showed that free herds have lower SCC, CR, CMR, and shorter CIV than the breakdown herds. Within the breakdown herds, the new BVDV introduction affected the SCC and CMR. In the year after BVDV introduction, the SCC was higher than that in the year before BVDV introduction, with a factor of 1.011 [2.5th to 97.5th percentile (95% PCTL): 1.002, 1.020]. Compared with the year before BVDV breakdown, the CMR in the year of breakdown and the year after breakdown was higher, with factors of 1.170 (95% PCTL: 1.120; 1.218) and 1.096 (95% PCTL: 1.048; 1.153), respectively. This study reveals that a new introduction of BVDV had a negative but on average relatively small effect on herd performance in herds participating in a BVDV control program.
- Published
- 2021
33. Survival analysis of dairy cows in the Netherlands under altering agricultural policy
- Author
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Kulkarni, Pranav, Mourits, Monique, Nielen, Mirjam, van den Broek, Jan, Steeneveld, Wilma, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH theoretische epidemiologie, FAH Evidence based Veterinary Medicine, dFAH AVR, and FAH theoretische epidemiologie
- Subjects
Survival ,040301 veterinary sciences ,Animal Culling ,030231 tropical medicine ,Bedrijfseconomie ,WASS ,Culling ,Accelerated failure time model ,Biology ,0403 veterinary science ,Dairy ,03 medical and health sciences ,0302 clinical medicine ,Animal science ,Food Animals ,Business Economics ,Pregnancy ,Lactation ,medicine ,Milk quota ,Animals ,Survival analysis ,Netherlands ,business.industry ,food and beverages ,04 agricultural and veterinary sciences ,Phosphate regulation ,Survival Analysis ,Dairying ,medicine.anatomical_structure ,Policy ,Risk factors ,Agriculture ,Milk-quota ,Cattle ,Female ,Animal Science and Zoology ,business ,Parity (mathematics) ,Somatic cell count - Abstract
Culling of underperforming dairy cows by replacement heifers is a fundamental part of Dutch dairy farm management. Changes in national agricultural policies can influence farmers’ culling decisions. The objective of this study was to analyse the relevancy of cow-level risk factors for survival of Dutch dairy cows under perturbations due to national policy changes related to the -milk quota abolishment of 2015 and the phosphate regulations since 2017. For this purpose, an accelerated failure time model was fitted on-longitudinal dairy cows’ data at national level covering the period 2009−2019. The associated cow-level risk factors for culling such as lactation value (relative production level), parity number, rolling average of inseminations over all parities, very high fat-protein ratio (highFPR) and very low fat-protein ratio (lowFPR) in early lactation , test-day somatic cell count , were fitted in the model. Along with these, a factor representing three target policy periods, namely Milk Quota period (MQ), Post-Milk Quota period (PMQ) and Phosphate regulation period (PH) were fitted. The mean survival age for all producing cows was 441 weeks overall. The predicted median survival time for the policy periods MQ, PMQ and PH were 273 weeks, 271 weeks and 256 weeks, respectively. Risk factors such as lactation value, parity and highFPR, rolling average of inseminations over all parities were positively associated with survival time in all three policy periods. Risk factors such as test-day somatic cell count and lowFPR were negatively associated with survival time in all three policy periods. In conclusion, this study demonstrated the differences in survival of Dutch dairy cows in response to changing agricultural policy. The association of cow-level risk factors for culling was consistent across the three evaluated policy periods.
- Published
- 2021
34. Linear Mixed-Effects Model to Quantify the Association between Somatic Cell Count and Milk Production in Italian Dairy Herds.
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Luo, Tiantian, Steeneveld, Wilma, Nielen, Mirjam, Zanini, Lucio, and Zecconi, Alfonso
- Subjects
- *
MILK yield , *DAIRY cattle , *SOMATIC cells , *DAIRY farm management , *PRODUCTION losses , *SCIENTIFIC literature , *DAIRY farms - Abstract
Simple Summary: Milk production loss due to mastitis in dairy herds is economically important. This study based on milk test records on more than 800,000 cows in Lombardy (Italy), and using a mixed-effects model with six fixed effects (geographical Area, Breed, Days in Milk, Parity, Season and Year) this study confirmed a negative association of somatic cell counts with milk production. However, the changes in milk production were different from others reported from previous scientific literature, suggesting that local factors may affect this association. Therefore, before estimating the economic impacts of mastitis, it is crucial to quantify the association between mastitis and milk production in relation to the characteristics of the sampled population. The results could help in prioritizing the interventions from the advisory services. They may be also used as a reference for areas in other countries with similar characteristics to Lombardy. Milk production loss due to mastitis in dairy herds is economically important. Before estimating the economic impacts of mastitis, it is crucial to quantify the association between mastitis and milk production. The objective of this study was to estimate the association between somatic cell count (SCC, as an indicator of intramammary infection due to mastitis) and milk production for dairy cows in Lombardy, Italy. The test-day (TD) records data of 3816 dairy herds located in three different geographical areas of Lombardy from January 2016 to December 2018 were used. After data editing, the final dataset comprised 10,445,464 TD records from 2970 farms and 826,831 cows. The analysis was carried out by using a mixed-effects model with six fixed effects (geographical Area, Breed, Days in Milk, Parity, Season and Year) and nested random effects for each cow and herd. The results confirmed that the SCC had a negative association with milk production. On average, this study found that any two-fold increase of SCC resulted in a milk production loss of 0.830 (95% CI: −0.832, −0.828) kg/cow/day in the whole of Lombardy. These results can be used for economic calculations on the costs of mastitis. [ABSTRACT FROM AUTHOR]
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- 2023
- Full Text
- View/download PDF
35. Economic and epidemiological impact of different intervention strategies for subclinical and clinical mastitis
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Gussmann, Maya, Steeneveld, Wilma, Kirkeby, Carsten, Hogeveen, Henk, Farre, Michael, Halasa, Tariq, LS Evidence Based Vet Medicine, dFAH AVR, LS Evidence Based Vet Medicine, and dFAH AVR
- Subjects
medicine.medical_specialty ,Staphylococcus aureus ,040301 veterinary sciences ,Denmark ,animal diseases ,030231 tropical medicine ,Bedrijfseconomie ,Psychological intervention ,WASS ,Culling ,Opportunistic Infections ,Intramammary infection ,Streptococcus agalactiae ,0403 veterinary science ,03 medical and health sciences ,0302 clinical medicine ,Food Animals ,Business Economics ,Environmental health ,Intervention (counseling) ,Streptococcal Infections ,Epidemiology ,Taverne ,Control ,medicine ,Animals ,Dairy cattle ,Asymptomatic Infections ,Mastitis, Bovine ,Subclinical infection ,business.industry ,04 agricultural and veterinary sciences ,Staphylococcal Infections ,medicine.disease ,Mastitis ,Dairying ,Communicable Disease Control ,Herd ,Simulation model ,Animal Science and Zoology ,Cattle ,Female ,business - Abstract
The objective of this study was to evaluate and compare different combinations of intervention strategies for contagious or opportunistic subclinical and clinical intramammary infections (IMI). We simulated two different Danish dairy cattle herds with ten different intervention strategies focusing on cow-specific treatment or culling, including three baseline strategies without subclinical interventions. In one herd, the main causative pathogen of IMI was Staphylococcus (S.) aureus. In the other herd, Streptococcus (St.) agalactiae was the main causative agent. For both herds, we investigated costs and effectiveness of all ten intervention strategies. Intervention strategies consisted of measures against clinical and subclinical IMI, with baselines given by purely clinical intervention strategies. Our results showed that strategies including subclinical interventions were more cost-effective than the respective baseline strategies. Increase in income and reduction of IMI cases came at the cost of increased antibiotic usage and an increased culling rate in relation to IMI. However, there were differences between the herds. In the St. agalactiae herd, the clinical intervention strategy did not seem to have a big impact on income and number of cases. However, intervention strategies which included cow-specific clinical interventions led to a higher income and lower number of cases in the S. aureus herd. The results show that intervention strategies including interventions against contagious or opportunistic clinical and subclinical IMI can be highly cost-effective, but should be herd-specific.
- Published
- 2019
36. An Empirical Analysis on the Longevity of Dairy Cows in Relation to Economic Herd Performance
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Vredenberg, Imke, Han, Ruozhu, Mourits, Monique, Hogeveen, Henk, Steeneveld, Wilma, FAH veterinaire epidemiologie, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH veterinaire epidemiologie, FAH Evidence based Veterinary Medicine, and dFAH AVR
- Subjects
media_common.quotation_subject ,animal diseases ,Bedrijfseconomie ,Environmental pollution ,WASS ,Culling ,Biology ,Gross margin ,Milking ,Animal science ,culling age ,longevity ,Business Economics ,Animal welfare ,media_common ,Original Research ,lcsh:Veterinary medicine ,General Veterinary ,Longevity ,food and beverages ,lifetime milk production ,economics ,Random effects model ,accounting data ,Herd ,lcsh:SF600-1100 ,Veterinary Science ,dairy (cows) - Abstract
Several studies have stated the various effects of an increased dairy cow longevity on economic herd performance, but empirical studies are lacking. This study aimed to investigate the association between longevity of dairy cows and the economic performance of dairy herds based on longitudinal Dutch accounting data. Herd and farm accounting data (n = 855 herds) over the years 2007–2016 were analyzed. Herd data contained yearly averages on longevity features, herd size and several production variables. Longevity was defined as the age of cows at culling and by lifetime milk production of culled cows. Farm accounting data contained yearly averages on revenues, fixed and variable costs of the herds, by which gross margins were defined. Data was analyzed using generalized linear mixed modeling, with gross margin as dependent variable. The independent variables consisted of average age of culled cows, average lifetime production of culled cows, year, herd size, herd intensity (milk production per ha), herd expansion rate, soil type, milking system, successor availability, total full-time equivalent, heifer ratio (% of heifers per cow) and use of outsourced heifer rearing. Herd was included as a random effect to account for the heterogeneity among herds. Descriptive statistics showed that the average age of culled cows was 5.87 (STD = 0.78) years and the average lifetime milk production of culled cows was 31.87 (STD = 7.56) tons per cow with an average herd size of 89 cows (STD = 38.85). The average age of culled cows was stable over the 10 years (variation between 5.79 AND 5.90 years). The gross margin was on average €24.80/100 kg milk (STD = 4.67), with the lowest value in year 2009 and the highest value in year 2013. Gross margin was not significantly associated with age of culled cows and lifetime milk production of culled cows. Variance in longevity between herds was large (STD = 0.78 years) but herds with a higher longevity did not perform economically better nor worse than herds resulting in lower longevity. This indicates that, within current practice, there is potential for improving longevity in order to meet society's concerns on animal welfare and environmental pollution, without affecting the economic performance of the herd.
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- 2021
37. The effect of bovine viral diarrhea virus introduction on milk production of Dutch dairy herds
- Author
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Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, Gerdien, Vernooij, Johannes C.M., van Duijn, Linda, Veldhuis, Anouk M.B., Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH veterinaire epidemiologie, Dep Gezondheidszorg Landbouwhuisdieren, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH veterinaire epidemiologie, and Dep Gezondheidszorg Landbouwhuisdieren
- Subjects
Yield (finance) ,viruses ,animal diseases ,Bedrijfseconomie ,WASS ,Biology ,Antibodies, Viral ,Virus ,Herd immunity ,03 medical and health sciences ,bovine viral diarrhea virus introduction ,Animal science ,Milk yield ,Business Economics ,Genetics ,Animals ,control program ,milk production ,Viral diarrhea ,030304 developmental biology ,0303 health sciences ,Diarrhea Viruses, Bovine Viral ,Dairy herds ,0402 animal and dairy science ,virus diseases ,04 agricultural and veterinary sciences ,Milk production ,040201 dairy & animal science ,Dairying ,Milk ,bovine viral diarrhea virus ,Herd ,Bovine Virus Diarrhea-Mucosal Disease ,Cattle ,Female ,Animal Science and Zoology ,Food Science - Abstract
Dairy cows are negatively affected by the introduction of bovine viral diarrhea virus (BVDV), and consequently, produce less milk. Existing literature on potential milk production losses is based on relatively outdated data and hardly evaluates milk production loss in relation to a new BVDV infection in a surveillance system. This study determined the annual and quarterly loss in milk production of BVDV introduction in 3,126 dairy herds participating in the Dutch BVDV-free program between 2007 and 2017. Among these herds, 640 were "breakdown-herds" that obtained and subsequently lost their BVDV-free status during the study period, and 2,486 herds obtained and retained their BVDV-free status during the study period. Milk yields before and after BVDV introduction were compared through annual and quarterly linear mixed models. The fixed variables for both models included herd type (breakdown-herd or free-herd), bovine viral diarrhea status (on an annual and quarterly basis), year, season, and a random herd effect. The dependent variable was the average daily milk yield on the test day. To define the possible BVDV-introduction dates, 4 scenarios were developed. In the default scenario, the date of breakdown (i.e., loss of the BVDV-free status) was assumed as the BVDV-introduction date. For the other 3 scenarios, the BVDV-introduction dates were set at 4, 6, and 9 mo before the date of breakdown, based on the estimated birth date of a persistently infected calf. In the default scenario, the loss in milk yield due to BVDV introduction occurred mainly in the first year after breakdown, with a reduction in yield of 0.08 kg/cow per day compared with the last year before breakdown. For the other 3 scenarios, the greatest yield reduction occurred in the second year after BVDV introduction, with a loss of 0.09, 0.09, and 0.1 kg/cow per day, respectively. For the first 4 quarters after BVDV introduction in the default scenario, milk yield loss was 0.14, 0.09, 0.02, and 0.08 kg/cow per day, respectively. These quarterly results indicated that milk yield loss was greatest in the first quarter after BVDV introduction. Overall, BVDV introduction had a negative, but on average a relatively small, effect on milk yield for herds participating in the BVDV-free program. This study will enable dairy farmers and policymakers to have a clearer understanding of the quantitative milk production effect of BVDV on dairy farms in a control program.
- Published
- 2021
38. Survival analysis of dairy cows in the Netherlands under altering agricultural policy
- Author
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FAH Evidence based Veterinary Medicine, dFAH AVR, FAH theoretische epidemiologie, Kulkarni, Pranav, Mourits, Monique, Nielen, Mirjam, van den Broek, Jan, Steeneveld, Wilma, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH theoretische epidemiologie, Kulkarni, Pranav, Mourits, Monique, Nielen, Mirjam, van den Broek, Jan, and Steeneveld, Wilma
- Published
- 2021
39. The effect of new bovine viral diarrhea virus introduction on somatic cell count, calving interval, culling, and calf mortality of dairy herds in the Dutch bovine viral diarrhea virus–free program
- Author
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FAH Evidence based Veterinary Medicine, dFAH AVR, Yue, Xiaomei, Voort, Mariska van der, Steeneveld, Wilma, Schaik, Gerdien van, Vernooij, Johannes C.M., Duijn, Linda van, Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, Yue, Xiaomei, Voort, Mariska van der, Steeneveld, Wilma, Schaik, Gerdien van, Vernooij, Johannes C.M., Duijn, Linda van, and Hogeveen, Henk
- Published
- 2021
40. An Empirical Analysis on the Longevity of Dairy Cows in Relation to Economic Herd Performance
- Author
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FAH veterinaire epidemiologie, FAH Evidence based Veterinary Medicine, dFAH AVR, Vredenberg, Imke, Han, Ruozhu, Mourits, Monique, Hogeveen, Henk, Steeneveld, Wilma, FAH veterinaire epidemiologie, FAH Evidence based Veterinary Medicine, dFAH AVR, Vredenberg, Imke, Han, Ruozhu, Mourits, Monique, Hogeveen, Henk, and Steeneveld, Wilma
- Published
- 2021
41. Data underlying the manuscript: The effect of new bovine viral diarrhea virus (BVDV) introduction on somatic cell count, calving interval, culling rate and calf mortality of dairy herds in the Dutch BVDV-free program
- Author
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Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, Gerdien, Vernooij, Hans, van Duijn, Linda, Hogeveen, Henk, Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, Gerdien, Vernooij, Hans, van Duijn, Linda, and Hogeveen, Henk
- Abstract
Supplemental material for the paper titled "The effect of new bovine viral diarrhea virus (BVDV) introduction on somatic cell count, calving interval, culling rate and calf mortality of dairy herds in the Dutch BVDV-free program".
- Published
- 2021
42. The effect of bovine viral diarrhea virus introduction on milk production of Dutch dairy herds
- Author
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Yue, X., Steeneveld, Wilma, van der Voort, M., van Schaik, Gerdien, Vernooij, J.C.M., van Duijn, Linda, Veldhuis, A.M.B., Hogeveen, H., Yue, X., Steeneveld, Wilma, van der Voort, M., van Schaik, Gerdien, Vernooij, J.C.M., van Duijn, Linda, Veldhuis, A.M.B., and Hogeveen, H.
- Abstract
Dairy cows are negatively affected by the introduction of bovine viral diarrhea virus (BVDV), and consequently, produce less milk. Existing literature on potential milk production losses is based on relatively outdated data and hardly evaluates milk production loss in relation to a new BVDV infection in a surveillance system. This study determined the annual and quarterly loss in milk production of BVDV introduction in 3,126 dairy herds participating in the Dutch BVDV-free program between 2007 and 2017. Among these herds, 640 were “breakdown-herds” that obtained and subsequently lost their BVDV-free status during the study period, and 2,486 herds obtained and retained their BVDV-free status during the study period. Milk yields before and after BVDV introduction were compared through annual and quarterly linear mixed models. The fixed variables for both models included herd type (breakdown-herd or free-herd), bovine viral diarrhea status (on an annual and quarterly basis), year, season, and a random herd effect. The dependent variable was the average daily milk yield on the test day. To define the possible BVDV-introduction dates, 4 scenarios were developed. In the default scenario, the date of breakdown (i.e., loss of the BVDV-free status) was assumed as the BVDV-introduction date. For the other 3 scenarios, the BVDV-introduction dates were set at 4, 6, and 9 mo before the date of breakdown, based on the estimated birth date of a persistently infected calf. In the default scenario, the loss in milk yield due to BVDV introduction occurred mainly in the first year after breakdown, with a reduction in yield of 0.08 kg/cow per day compared with the last year before breakdown. For the other 3 scenarios, the greatest yield reduction occurred in the second year after BVDV introduction, with a loss of 0.09, 0.09, and 0.1 kg/cow per day, respectively. For the first 4 quarters after BVDV introduction in the default scenario, milk yield loss was 0.14, 0.09, 0.02, and 0.08 kg/c
- Published
- 2021
43. A stochastic modelling approach to determine the effect of diverse Staphylococcus aureus strains on the economic and epidemiological outcomes of mastitis intervention strategies in dairy cattle
- Author
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Exel, Catharina E, Halasa, Tariq, Koop, Gerrit, Steeneveld, Wilma, Lam, Theo J G M, Benedictus, Lindert, Gussmann, Maya, FAH veterinaire epidemiologie, dFAH AVR, dFAH I&I, FAH Evidence based Veterinary Medicine, FAH veterinaire epidemiologie, dFAH AVR, dFAH I&I, and FAH Evidence based Veterinary Medicine
- Subjects
Staphylococcus aureus ,Cattle Diseases ,Mastitis ,Staphylococcal Infections ,Intramammary infection ,Dairying ,Milk ,Intervention strategy ,Food Animals ,Strain differentiation ,Animals ,Simulation model ,Female ,Cattle ,Animal Science and Zoology ,Mastitis, Bovine - Abstract
Staphylococcus aureus (S. aureus) strains with considerable genetic and phenotypic differences have previously been identified. The economic and epidemiologic impact of S. aureus mastitis has been investigated, but none of these studies took differences between strains into account. Here we aimed to investigate how differences between S. aureus strains affect the economic and epidemiologic outcome of various intervention strategies against clinical and subclinical intramammary infections. Five S. aureus strains were modelled using a stochastic bio-economic model simulating a dairy herd of 200 cows using single-day time steps. The strain characteristics of the five simulated S. aureus strains (general, contagious, spill-over, clinical and persistent) were based on divergent phenotypes as described in literature. Outcomes of the model included incidence (both clinical and subclinical), number of antibiotic treatment days, number of culled cows, and net income. Intervention strategies against clinical and subclinical intramammary infections were based on (variations of) intramammary antibiotic treatment, testing, and culling. Both single and multiple pathogen (intramammary infection caused by S. aureus, Escherichia coli, and non-aureus staphylococci) scenarios were simulated to determine the effect of the five S. aureus strains on the impact of 19 different intervention strategies. The results showed that the incidence (both clinical and subclinical), number of treatment days, number of culled cows, and net income varied considerably for the different S. aureus strains. Comparison of the model outcomes within and between strains showed that for most intervention strategies the relative impact differed per strain. However, the intervention strategy with the best outcome for most variables and strains was the culling of cows with a recovery probability lower than 50%. This shows that the relative economic and epidemiologic impact of most of the modelled intervention strategies were strain-dependent, while some intervention strategies were not strain-dependent. From this, we conclude that, depending on the intervention strategy applied on a farm, it could be advantageous to type S. aureus to determine whether it would be economically and epidemiologically beneficial for the existing intervention strategy to be changed.
- Published
- 2022
44. Estimating the combined costs of clinical and subclinical ketosis in dairy cows
- Author
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Steeneveld, Wilma, Amuta, Paul, van Soest, Felix J.S., Jorritsma, Ruurd, Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH GZ herkauwer, FAH Evidence based Veterinary Medicine, dFAH AVR, and FAH GZ herkauwer
- Subjects
Percentile ,Animal Culling ,Physiology ,Economics ,Maternal Health ,Social Sciences ,WASS ,Culling ,Mastitis ,Animal Diseases ,0403 veterinary science ,Endocrinology ,Reproductive Physiology ,Medicine and Health Sciences ,Medicine ,Multidisciplinary ,Simulation and Modeling ,04 agricultural and veterinary sciences ,Veterinary Diagnostics ,Body Fluids ,Dairying ,Milk ,Anatomy ,Research Article ,Risk ,Veterinary Medicine ,Farms ,040301 veterinary sciences ,Science ,Bedrijfseconomie ,Cattle Diseases ,Context (language use) ,Research and Analysis Methods ,Insemination ,Beverages ,Animal science ,Business Economics ,Life Science ,Animals ,Lactation ,Nutrition ,Endocrine Physiology ,business.industry ,0402 animal and dairy science ,Biology and Life Sciences ,Bovine Mastitis ,Ketosis ,Models, Theoretical ,medicine.disease ,040201 dairy & animal science ,Diet ,Fertilization ,Herd ,Women's Health ,Cash flow ,Cattle ,Veterinary Science ,business ,Zoology ,Developmental Biology - Abstract
Clinical ketosis (CK) and subclinical ketosis (SCK) are associated with lower milk production, lower reproductive performance, an increased culling of cows and an increased probability of other disorders. Quantifying the costs related to ketosis will enable veterinarians and farmers to make more informed decisions regarding the prevention and treatment of the disease. The overall aim of this study was to estimate the combined costs of CK and SCK using assumptions and input variables from a typical Dutch context. A herd level dynamic stochastic simulation model was developed, simulating 385 herds with 130 cows each. In the default scenario there was a CK probability of almost 1% and a SCK probability of 11%. The herds under the no risk scenario had no CK and SCK, while the herds under the high-risk scenario had a doubled probability of CK and SCK compared to the default scenario. The results from the simulation model were used to estimate the annual cash flows of the herds, including the costs related to milk production losses, treatment, displaced abomasum, mastitis, calf management, culling and feed, as well as the returns from sales of milk and calves. The difference between the annual net cash flows of farms in the no risk scenario and the default scenario provides the estimate of the herd level costs of ketosis. Average herd level costs of ketosis (CK and SCK combined) were €3,613 per year for a default farm and €7,371 per year for a high-risk farm. The costs for a single CK case were on average €709 (with 5 and 95 percentiles of €64 and €1,196, respectively), while the costs for a single SCK case were on average €150 (with 5 and 95 percentiles of €18 and €422, respectively) for the default farms. The differences in costs between cases occurred due to differences between cases (e.g., cow culled vs cow not culled, getting another disease vs not getting another disease).
- Published
- 2020
45. The effect of bovine viral diarrhea virus introduction on milk production of Dutch dairy herds
- Author
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FAH Evidence based Veterinary Medicine, dFAH AVR, FAH veterinaire epidemiologie, Dep Gezondheidszorg Landbouwhuisdieren, Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, Gerdien, Vernooij, Johannes C.M., van Duijn, Linda, Veldhuis, Anouk M.B., Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH veterinaire epidemiologie, Dep Gezondheidszorg Landbouwhuisdieren, Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, Gerdien, Vernooij, Johannes C.M., van Duijn, Linda, Veldhuis, Anouk M.B., and Hogeveen, Henk
- Published
- 2020
46. Estimating the combined costs of clinical and subclinical ketosis in dairy cows
- Author
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FAH Evidence based Veterinary Medicine, dFAH AVR, FAH GZ herkauwer, Steeneveld, Wilma, Amuta, Paul, van Soest, Felix J.S., Jorritsma, Ruurd, Hogeveen, Henk, FAH Evidence based Veterinary Medicine, dFAH AVR, FAH GZ herkauwer, Steeneveld, Wilma, Amuta, Paul, van Soest, Felix J.S., Jorritsma, Ruurd, and Hogeveen, Henk
- Published
- 2020
47. Data underlying the publication: The effect of bovine viral diarrhea virus introduction on milk production of Dutch dairy herds
- Author
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Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, G., Vernooij, J.C.M., van Duijn, C., Veldhuis, A.M.B., Hogeveen, Henk, Yue, Xiaomei, Steeneveld, Wilma, van der Voort, Mariska, van Schaik, G., Vernooij, J.C.M., van Duijn, C., Veldhuis, A.M.B., and Hogeveen, Henk
- Abstract
Supplemental material for the paper titled "The impact of bovine viral diarrhea virus introduction on milk production of Dutch dairy herds".
- Published
- 2020
48. Economic and epidemiological impact of different intervention strategies for clinical contagious mastitis
- Author
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Gussmann, Maya, Steeneveld, Wilma, Kirkeby, Carsten, Hogeveen, Henk, Nielen, Mirjam, Farre, Michael, Halasa, Tariq, LS Evidence Based Vet Medicine, dFAH AVR, LS Evidence Based Vet Medicine, and dFAH AVR
- Subjects
Staphylococcus aureus ,medicine.medical_specialty ,medicine.drug_class ,Denmark ,cow-specific ,Bedrijfseconomie ,Antibiotics ,WASS ,Culling ,03 medical and health sciences ,Business Economics ,Intervention (counseling) ,Internal medicine ,Epidemiology ,Genetics ,medicine ,Animals ,Computer Simulation ,Mastitis, Bovine ,Dairy cattle ,030304 developmental biology ,0303 health sciences ,culling ,treatment ,business.industry ,simulation model ,Incidence (epidemiology) ,0402 animal and dairy science ,food and beverages ,04 agricultural and veterinary sciences ,Staphylococcal Infections ,medicine.disease ,040201 dairy & animal science ,Anti-Bacterial Agents ,Mastitis ,Dairying ,Milk ,Herd ,Cattle ,Female ,Animal Science and Zoology ,business ,Food Science - Abstract
The overall aim of this study was to compare different intervention strategies for clinical intramammary infections (IMI). We conducted a simulation study to represent a Danish dairy cattle herd with IMI caused mostly by Staphylococcus aureus and 9 different intervention strategies for clinical IMI. A standard intervention of 3 d of treatment consisting of intramammary injections for all clinical cases was used. Two of the strategies reflected the use of more antibiotics and 6 strategies reflected cow-specific treatment or culling decisions. For these strategies, we assessed the cost and effectiveness of culling as an IMI intervention. Our results showed that nearly all strategies could reduce the number of IMI cases [e.g., a median of 37 clinical cases with the extended intramammary treatment over 5 d strategy (Basic5) and 30 clinical cases with the cow culled with recovery probability below 50% (Before50)] compared with the standard intervention (median of 42 clinical cases). This happened alongside either increased antibiotic usage (e.g., from a median of 123 treatment days up to 179 treatment days with strategy Basic5) or an increased number of cows culled in relation to IMI (e.g., from a median of 16 up to 24 cows with strategy Before50). Strategies with more antibiotics or reactive culling had a slightly higher net income (e.g., €190,014 median net income with strategy Basic5 or €196,995 with strategy Before50 compared with €187,666 with the standard strategy). This shows that a cow-specific clinical intervention approach can be cost-effective in reducing IMI incidence.
- Published
- 2019
49. Increasing the efficiency of the veterinary clinic by delegating diagnostic tasks to veterinary nurses.
- Author
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Vastenburg, C., Steeneveld, Wilma (Thesis Advisor), Vastenburg, C., and Steeneveld, Wilma (Thesis Advisor)
- Abstract
Introduction – It has been shown in human healthcare that delegating tasks to nursing staff increases the efficiency due to improving patient flow, patient care and the overall work environment. The objective of this study is to examine whether this method can improve the efficiency of a veterinary clinic by limiting waiting time for the pet owner and consult duration by delegating the additional diagnostics to the veterinary nurse. Method and Materials – Six veterinary clinics in the Netherlands from AniCura were visited during four weeks. For each consult with additional diagnostics, several variables were recorded: gender and work experience of the veterinarian, work experience of the veterinary nurse, consult duration, waiting time for the pet owner, who handled the additional diagnostics, the type of diagnostics, the moment the results were communicated and general information from each clinic (ex. clinic size and years in business). The results were analyzed in SPSS. Results – The consult duration was not significantly shorter when the veterinary nurse handled the diagnostics. A regression analysis of all the measured variables during consults showed that the gender of the veterinarian (p=0,035) and the clinic size (p=0,043) were significant predictors of the consult duration. The waiting time was significantly shorter when the veterinary nurse handled the diagnostics (p=0,002). A regression analysis of all the measured variables during consults showed that the handler of the additional diagnostics (p=0,019), the type of diagnostics (p=0,017) and the location (p=0,023) were significant predictors of the waiting time. Conclusion – This study has shown that delegating the additional diagnostics to the veterinary nurses during consults, significantly decreases the waiting time for the pet owner. However, there are still factors that are unclear and need to be further researched.
- Published
- 2019
50. A throughout evaluation of the Lely Astronaut automatic milking system’s health report
- Author
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Wetering, S.J. van de, Steeneveld, Wilma (Thesis Advisor), Wetering, S.J. van de, and Steeneveld, Wilma (Thesis Advisor)
- Abstract
In 2016, Lely introduced a health report; an extension of the earlier udder health report that was part of the management system (Time for Cows, T4C). The health report enables the farmer to be able to detect more diseases than just mastitis with the Lely Astronaut. The overall goal of this study is to evaluate the performance of the health report from the management system T4C from the Lely Astronaut. To get this insight, the positive and negative predictive value has been calculated, the number of false positives has been determined and the use of the health report by farmers has been examined. Six farms around Utrecht that use a Lely Astronaut were visited three to four times for the study. During the first visit, a questionnaire was taken to get an impression of the farm. Each visit the farmer was interviewed about the attentions on the health report that day. After this interview, the student examined the cows that were on the health report that day with the aid of two flowcharts. The student also visually assessed with the aid of a flowchart the health of five cows randomly selected per AMS that were not on the health report. A total of 41 attentions were examined on the health reports. In this study, a value of 90% was found for the positive predictive value and a value of 89% was found for the negative predictive value. Furthermore, a percentage of 10% false positives has been found. Farmers checked once a week to three times a day the health report and it appeared that on average 56% of all attentions are checked by the farmers. The most important reason to check a cow on the report is when the attention for increased conductivity or mastitis attention is on the report. It can be concluded that the health report of T4C van Lely has been improved compared to the udder health report of T4C. The positive predictive value has increased compared to previous findings and farmers are checking more attentions than before. However, cows are still missing on the repo
- Published
- 2019
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