Antimicrobial use and farmers' attitude toward mastitis treatment on dairy farms with automatic or conventional milking systems

Deng, Zhaoju; Lam, T.J.G.M.; Hogeveen, H.; Spaninks, Mirlin; Heij, N.; Postema, Michiel; Werven, T. van; Koop, Gerrit

doi:10.3168/jds.2019-17960

Cited by 17 publications

(8 citation statements)

References 31 publications

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“…This is in line with findings in a study on Finnish farms in 2016, which showed that AMS farms were more likely to apply BDCT than were CMS farms (Vilar et al, 2018;Niemi et al, 2020). At the same time, another recent study on Dutch dairy farms showed that AMS farmers used equal amounts of antimicrobials during the lactation and at drying-off as CMS farmers (Deng et al, 2020).…”

Section: Comparison Between Ams and Cms Farmssupporting

confidence: 88%

Effect of selective dry cow treatment on udder health and antimicrobial usage on Dutch dairy farms

Tijs

Holstege

Scherpenzeel

et al. 2022

Journal of Dairy Science

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Since 2013, selective dry cow treatment (SDCT) has been the standard approach in the Netherlands where farmers select cows for the use of antimicrobials at drying-off. Shortly after its introduction, antimicrobial usage decreased significantly, and no significant association was found between the level of SDCT and clinical mastitis (CM). Obviously, at that time longterm associations could not be evaluated. This study aimed to provide insight into the methods and level of implementation of SDCT on Dutch dairy farms with a conventional milking system (CMS) or an automatic milking system (AMS) in 2016 and 2017, several years after the implementation of SDCT. Udder health and antimicrobial use were also assessed. For this study, 262 farmers recorded dry cow treatments as well as all CM cases in the period from May 1, 2016, until April 30, 2017. Additionally, somatic cell count (SCC) data on cow and herd level, treatment data on herd level and questionnaire results on udder health management were collected. Data were analyzed using descriptive statistics with differences between milking systems being evaluated using nonparametric univariable statistics. In the study period, SDCT was applied on almost all (98.8%) of the participating dairy farms. The main reason for applying antimicrobials at drying-off was either the SCC history during the complete previous lactation or the SCC at the last milk recording before drying-off. The median percentage of cows treated with antimicrobials was 48.5%. The average incidence rate of CM was 27.3 cases per 100 cows per year. From all CM cases that were registered per herd, on average 32.8% were scored as mild, 42.2% as moderate, and 25.0% as severe CM. The mean bulk tank SCC of the herds was 168,989 cells/mL. A cow was considered to have sub-clinical mastitis (SCM) if individual SCC was ≥150,000 cells/mL for primiparous and ≥250,000 cells/mL for multiparous cows. Passing these threshold values after 2 earlier low SCC values was considered a new case of SCM. The mean incidence rate of SCM in these herds was 62.5 cases per 100 cows per year. Bulk tank SCC and the incidence rate of SCM on farms with a CMS were statistically lower than on farms with an AMS, whereas the incidence rate of CM did not significantly differ between both groups of farms. The AMS farms had more cows per herd treated with antimicrobials at drying-off and a larger proportion of severe CM cases than did CMS farms. It is unknown whether the differences are due to the milking system or to other differences between both types of farms. This study showed the level of adoption of SDCT, udder health, and antimicrobial usage parameters several years after the ban on the preventive use of antimicrobials in animal husbandry. It found that udder health parameters did not differ from those found in Dutch studies before and around the time of implementing SDCT, whereas SDCT was widely applied on Dutch dairy farms during the study period. Therefore, it was concluded that Dutch dairy farmers were able to handle the changed poli...

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Section: Comparison Between Ams and Cms Farmssupporting

confidence: 88%

Effect of selective dry cow treatment on udder health and antimicrobial usage on Dutch dairy farms

Tijs

Holstege

Scherpenzeel

et al. 2022

Journal of Dairy Science

Self Cite

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“…Clinical mastitis and antimicrobial usage data, which are also relevant from an udder health perspective, were not available for our analysis. In a recent study, Deng et al (2020) found no difference in the number of animal-defined daily dosage per year between herds with an AMS and herds with a CMS. However, these authors did not evaluate the time around a transition to an AMS, whereas deteriorations in clinical mastitis and antimicrobial usage may be especially expected in this risk period based on the SCC deteriorations observed in this study and elsewhere.…”

Section: Discussionmentioning

confidence: 92%

Trends in somatic cell count deteriorations in Dutch dairy herds transitioning to an automatic milking system

Borne

Grinsven

Hogeveen

2021

Journal of Dairy Science

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This article is made publicly available in the institutional repository of Wageningen University and Research, under the terms of article 25fa of the Dutch Copyright Act, also known as the Amendment Taverne. This has been done with explicit consent by the author.Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work.This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this project research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.

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“…For some of them, resistance increased during the year of sampling in terms of the number of antimicrobials. The use of antimicrobials is one of the drivers of antimicrobial resistance and is generally related to the type of farming and milking systems (Deng et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Unprocessed milk as a source of multidrug-resistant Staphylococcus aureus strains

2021

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Staphylococcus aureus is the most relevant pathogen of animal mastitis and milk-related intoxications. Its presence in directly sold milk is rather not to be expected if strict udder health management and regular microbiological control of raw milk are performed. In this one-year survey, we present the results of monthly microbiological testing of milk from vending machines in Croatia for S. aureus and its multi-drug resistance. Staphylococcus aureus was detected in 27.58% of the samples. Among 60 tested isolates from 10 farmers, a total of 41 isolates were resistant to at least one antimicrobial agent (68.33%). A Multiple Antibiotic Resistance (MAR) index of 0.2 or higher had 48.8% of the resistant isolates, which is considered a high-risk potential for the spread of antimicrobial resistance. The majority of the isolates were resistant to penicillin and ampicillin followed by ciprofloxacin, ceftazidime, and kanamycin. The results impose the need for improving the control measures in the raw milk distribution chain focused on MAR risk reduction.

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Antimicrobial use and farmers' attitude toward mastitis treatment on dairy farms with automatic or conventional milking systems

Cited by 17 publications

References 31 publications

Effect of selective dry cow treatment on udder health and antimicrobial usage on Dutch dairy farms

Effect of selective dry cow treatment on udder health and antimicrobial usage on Dutch dairy farms

Trends in somatic cell count deteriorations in Dutch dairy herds transitioning to an automatic milking system

Unprocessed milk as a source of multidrug-resistant Staphylococcus aureus strains

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