87 Biosensors for on-farm diagnosis of mastitis (Research paper, Martins, 2019)

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Significant Impact Group(s): Precision Livestock Farming & Early detection \ Sensor technology ; Pathogen management
Species targeted: Dairy; Age: Adult;
Outcome Parameter(s): Mastitis indicative markers

Summary: Bovine mastitis is an inflammation of the mammary gland caused by a large number of infectious agents with devastating consequences for the dairy industry. Management of mastitis usually means using antibiotics to treat and prevent the disease, which can be problematic because of increased antimicrobial resistance. Typical diagnostic methods are based on somatic cell counts (SCC) and plate-culture techniques. But these methods are not quick and there is quite a lot of interest in making faster solutions that could provide onsite information, which would speed up the choice of treatment.

Biosensors are tools that can convert the presence of biological particles into an electric signal. Together with microfluidics, biosensors can be used in the development of automated and portable diagnostic devices. This review describes current approaches for mastitis diagnosis and the latest outcomes in biosensors and lab-on-chip devices with the potential to become real alternatives to standard practices.

Research paper: Martins – 2019 – Biosensors for on-farm diagnosis of mastitis – https://doi.org/10.3389/fbioe.2019.00186
Where to find the original material (in English):
https://www.frontiersin.org/articles/10.3389/fbioe.2019.00186/full;

Country: Portugal
Tags: dairy, mastitis, diagnositcs

87 Research paper – Martins – 2019 – Biosensors for on-farm diagnosis of mastitis

83 Storage of prescription veterinary medicines on UK dairy farms: a cross-sectional study (Research paper; Rees, 2019)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance \ Antibiotic use ; Prudent use AB
Species targeted: Dairy;
Age: Young; Adult;
Outcome Parameter(s): Quantity of antimicrobial stored
Summary: Many studies measure antimicrobial use on dairy farms, but little is known about the quantity and the way antimicrobials are stored on farms. The majority of prescription treatments occur without a veterinarian being present, however the association between use of these treatments and farmer decision making is still unclear. To better understand this situation, data were collected from 27 dairy farms in England and Wales. Antimicrobials were the group of medicines most commonly stored. It was common to find expired medicines and medicines not licensed for use in dairy cattle, and of antimicrobials considered critical. The medicine resources available to farmers are likely to influence their treatment decisions; so, finding medicines present in farms can give an idea of what motivates farmers to choose use certain types of medicines. The results are also helpful for policy makers and researchers to get a better understanding of patterns of medicine use.
83 Research paper – Rees – 2019 – Storage of prescription veterinary medicines on UK dairy farms_ a cross-sectional study
Where to find the original material:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6589450/; https://doi.org/10.1136/vr.105041
Country: UK

83 Research paper – Rees – 2019 – Storage of prescription veterinary medicines on UK dairy farms_ a cross-sectional study

81 Evaluation of two communication strategies to improve udder health management (Research report – Jansen, 2010)

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Significant Impact Group(s): Pathogen management \ Managing sick animals \ Targeted use of antibiotics ; Biosecurity
Species targeted: Dairy;
Age: Adult;
Outcome Parameter(s): improve udder health management; incidence of clinical mastistis; bulk milk somatic cell count (BMSCC)
Summary: This study shows that communication strategies to change farmers’ management practices can be improved when both the aim of the strategy and farmers’ motivational differences to work on udder health are taken into account. When aiming at complex issues such as udder health, the traditional central route using educational tools seems to be effective in reaching the motivated farmers. In addition to the central route, the peripheral route can be applied to influence farmers’ behavior by including implicit persuasion techniques instead of arguments in campaigns. This route is especially effective for single management practices and when aiming at a less complicated message. To reach as many farmers as possible, both communication strategies should be used. The communication strategies described in this paper are examples of how management practices to control mastitis can be effectively communicated to farmers, which can be used in optimizing future programs to control and prevent diseases.
81 Research paper – Jansen – 2010 – Evaluation of two communication strategies to improve udder health management
Where to find the original material:
https://www.sciencedirect.com/science/article/pii/S0022030210715034; https://doi.org/10.3168/jds.2009-2531
Country: NL

81 Research paper – Jansen – 2010 – Evaluation of two communication strategies to improve udder health management

80 Antimicrobial consumption on Austrian dairy farms: an observational study of udder disease treatments based on veterinary medication records ( Research paper; Firth, 2017)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance \ Antibiotic use ; Pathogen management
Species targeted: Dairy;Beef;
Age: Young;Adult;
Outcome Parameter(s): Antimicrobial use; Udder health
Summary: Since 2015, veterinarians have been required by law to report antimicrobials dispensed to farmers for use in food-producing animals. The study presented here collected data on antimicrobials dispensed to farmers and those administered by veterinarians.
Results show that dairy cattle in the study population in Austria were treated with antimicrobial agents at a relatively low and infrequent defined daily dose rate. The most frequently used antimicrobial group with respect to mastitis treatments was the beta-lactams, primarily penicillins, with third and fourth generation cephalosporins the most commonly used highest priority critically important antimicrobials with respect to both the proportion of herds treated and the number of defined daily doses administered per cow and year.
80 Research paper – Firth – 2017 – Antimicrobial consumption on Austrian dairy farms_ an observational study of udder disease treatments based on veterinary medication records
Where to find the original material:
https://peerj.com/articles/4072/; https://doi.org/10.7717/peerj.4072
Country: AT

80 Research paper – Firth – 2017 – Antimicrobial consumption on Austrian dairy farms_ an observational study of udder disease treatments based on veterinary medication records

77 Quantitative analysis of antimicrobial use on British dairy farms (Research paper; Hyde, 2017)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance \ Antibiotic use
Species targeted: Dairy;
Age: Adult;
Outcome Parameter(s): Antimicrobial use
Summary: Levels of antimicrobial usage (AMU) within the livestock industry have been cause of concern in connection to antimicrobial resistance. In order to identify factors associated with high AMU and set threshold for antimicrobial use (benchmarks) for dairy cattle AMU, data was gathered from 358 dairy farms using different types of methods.
Data analysis indicated that usage of antibiotics via oral and footbath routes increased the odds of a farm being part of the top antimicrobial users. While dairy cattle farm AMU was apparently lower than UK livestock average, some farms had extremely high AMU. Identification of these high use farms may be effective in targeting AMU reduction strategies and help reduce overall dairy cattle AMU.
77 Research paper – Hyde – 2017 – Quantitative analysis of antimicrobial use on British dairy farms
Where to find the original material:
https://veterinaryrecord.bmj.com/content/vetrec/early/2017/12/06/vr.104614.full.pdf; https://doi.org/10.1136/vr.104614
Country: UK

77 Research paper – Hyde – 2017 – Quantitative analysis of antimicrobial use on British dairy farms

76 The effect of a national mastitis control program on the attitudes, knowledge, and behavior of farmers in the Netherlands (Research paper; Jansen, 2010)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance \ Antibiotic use ; Prudent use AB
Species targeted: Dairy;
Age: Adult;
Outcome Parameter(s): Average annual bulk milk somatic cell count (BMSCC); Udder health
Summary: This study aimed to explore the effect of a national mastitis control program on Dutch farmers’ attitudes, knowledge, and behavior regarding mastitis.
Dairy farmers completed a survey on attitudes, knowledge, and behavior regarding mastitis before the start of a national mastitis control program in 2004, and 204 completed a similar survey in the final year of the program (2009). Although the average annual bulk milk somatic cell count (BMSCC) remained the same, the farmers’ self-reported attitudes, knowledge, and behavior changed significantly. The results show that a national mastitis control program can be successful in changing attitudes, knowledge, and behavior regarding mastitis. Results suggest an association between a change in BMSCC on individual farms and a change in attitudes, knowledge, and behavior. Although more research is needed to identify the long-term effect of these changes, this study can contribute to an increased understanding of the effects of animal health programs.
76 Research paper – Jansen – 2010 – The effect of a national mastitis control program on the attitudes knowledge and behavior of farmers in the Netherlands
Where to find the original material:
https://www.sciencedirect.com/science/article/pii/S0022030210006235; https://doi.org/10.3168/jds.2010-3318
Country: NL

76 Research paper – Jansen – 2010 – The effect of a national mastitis control program on the attitudes knowledge and behavior of farmers in the Netherlands

72 Influence of applying different units of measurement on reporting antimicrobial consumption data for pig farms (Research paper; Taverne, 2015)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance \ Antibiotic use
Species targeted: Pigs;
Age: Young; Adult;
Outcome Parameter(s): Antimicrobial consumption
Summary: International comparison is necessary to establish regulations on veterinary antimicrobial use and reducing antimicrobial resistance. Our study revealed interesting differences in outcomes on antimicrobial consumption in pigs following the use of different animal defined daily dosages. Differences in outcomes in an animal species can be attributed to the applied animal defined daily dosage due to differences in authorized indications and dosages, but can also be a result of differences in prescription patterns between farm types at the level of therapeutic groups or even specific antimicrobials within those groups, next to the differences in animal (sub) categories and standardized animal weights. This study underlines the urgent need for international harmonized units of measurement applicable in monitoring systems for antimicrobial use in livestock, such as generic animal defined daily dosages. But also harmonized animal (sub) categories and standardized animal weights for all animal species included in monitoring programs should be established.
72 Research paper – Taverne – 2015 – Influence of applying different units of measurement on reporting antimicrobial consumption data for pig farms
Where to find the original material:
https://bmcvetres.biomedcentral.com/articles/10.1186/s12917-015-0566-7; https://doi.org/10.1186/s12917-015-0566-7
Country: NL

72 Research paper – Taverne – 2015 – Influence of applying different units of measurement on reporting antimicrobial consumption data for pig farms

70 Explaining mastitis incidence in Dutch dairy farming: The influence of farmers’ attitudes and behaviour (Research paper; Jansen, 2009)

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Significant Impact Group(s): Pathogen management \ Managing sick animals \ Diagnostics
Species targeted: Dairy;
Age: Adult;
Outcome Parameter(s): Average farm bulk milk somatic cell count (BMSCC); clinical mastitis incidence; combined clinical and subclinical mastitis incidence
Summary: This study shows that mastitis incidence can be explained by farmers’ attitudes and self-reported (to a certain extent), specially farmers’ attitudes. In particular, the perceived feeling of control, the perceived effect of the average farm bulk milk somatic cell count (BMSCC) penalty level and the normative frame of reference are important in explaining the variation in mastitis incidence. Furthermore, the results suggest that BMSCC levels are better explained by attitudes and self-reported behaviour than actual clinical and subclinical mastitis incidence. It can be concluded that farmers’ attitudes are a better measure to explain differences in mastitis incidence between farms than farmers’ self-reported behavior. Therefore farmers’ attitudes should be taken into account in future research and animal health promotion. This study, therefore, provides an important investigation into the social processes applicable to mastitis incidence and emphasis on the need for effective communication strategies in mastitis control programs.
70 Research paper – Jansen – 2009 – Explaining mastitis incidence in Dutch dairy farming_ The influence of farmers’ attitudes and behaviour
Where to find the original material:
https://www.sciencedirect.com/science/article/pii/S0167587709002451; https://doi.org/10.1016/j.prevetmed.2009.08.015
Country: NL

70 Research paper – Jansen – 2009 – Explaining mastitis incidence in Dutch dairy farming_ The influence of farmers’ attitudes and behaviour

69 Treatment of clinical mastitis: Using antimicrobial susceptibility profiles for treatment decisions (Research paper; Constable, 2003)

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Significant Impact Group(s): Pathogen management \ Managing sick animals \ Diagnostics
Species targeted: Dairy;
Age: Adult;
Outcome Parameter(s): Treatment of clinical mastitis
Summary: Antibiotic treatment of clinical bacterial mastitis requires several steps:(1) using an antibiotic with an appropriate spectrum of activity; (2) selecting an antibiotic that effectively reach the site of infection (milk, mammary tissue, or blood); (3) treating for an appropriate duration; and (4) avoiding adverse local or systemic effects and residues. Antibiotics are often selected based on availability of labeled drugs, clinical signs in the cow, milk culture results for previous mastitis episodes in the herd, experience of treatment outcome in the herd, treatment cost, and withdrawal times for milk and slaughter. There has been recent interest in optimizing treatment protocols to better target antibiotic administration, with substantial reliance on susceptibility testing of bacterial isolates from cows with clinical mastitis. The purpose of this review is to evaluate the role, if any, that antimicrobial susceptibility testing should play in guiding treatment of clinical mastitis.
69 Research paper – Constable – 2003 – Treatment of clinical mastitis_Using antimicrobial susceptibility profiles for treatment decisions
Where to find the original material:
https://www.vetfood.theclinics.com/article/S0749-0720(02)00068-3/abstract; https://doi.org/10.1016/S0749-0720(02)00068-3
Country: US

69 Research paper – Constable – 2003 – Treatment of clinical mastitis_Using antimicrobial susceptibility profiles for treatment decisions

67 Prevalence of extended-spectrum and AmpC β-lactamase-producing Escherichia coli in Dutch dairy herds (Research paper; Heuvelink, 2019)

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Significant Impact Group(s): AMU reduction strategies \ Monitoring and surveillance
Species targeted: Dairy;
Age: Young; Adult;
Outcome Parameter(s): prevalence of extended-spectrum and AmpC β-lactamase-producing Escherichia coli (ESBL/AmpC-EC)
Summary: Between 2011 and 2013, the period during which the use of 3rd- and 4th-generation cephalosporins was minimized, the between-herd prevalence of resistant E. coli expressing ESBL/AmpC-genes in Dutch dairy herds declined significantly. Calves were found to have both, a much higher individual animal prevalence and a higher level of shedding than young stock and cows. The most sensitive approach to find ESBL/AmpC positive E. coli in Dutch dairy herds is through collecting samples from individual young calves.
67 Research paper – Heuvelink – 2019 – Prevalence of extended-spectrum and AmpC B-lactamase-producing Escherichia coli in Dutch dairy herds
Where to find the original material:
https://www.sciencedirect.com/science/article/pii/S0378113518313993; https://doi.org/10.1016/j.vetmic.2019.04.005
Country: NL

67 Research paper – Heuvelink – 2019 – Prevalence of extended-spectrum and AmpC B-lactamase-producing Escherichia coli in Dutch dairy herds