Insights into udder health and intramammary antibiotic usage on Irish dairy farms during 2003-2010

More, Simon J.; Clegg, Tracy A.; O’Grady, Luke

doi:10.1186/2046-0481-65-7

Cited by 27 publications

(44 citation statements)

References 33 publications

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“…The decline in milk yield and milk constituents during late lactation might lead to higher SCC as a result of decreasing dilution (Clements et al, 2005;Cole et al, 2009;More et al (2012). In our study, we could not distinguish between the effects of stage of lactation and direct effect of heat stress on the seasonality of SCC and milk volume because calving dates were not available.…”

Section: Seasonality Of Btscc and Milk Volumementioning

confidence: 51%

Effects of season and herd milk volume on somatic cell counts of Florida dairy farms

Ferreira

Vries

2015

Journal of Dairy Science

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Dairy farms in Florida produce less milk and milk with higher somatic cell counts (SCC) in the hot and humid summer. This has consequences for the interpretation of average milk quality. The objectives were to describe the associations of bulk tank SCC (BTSCC) with time of the year and the milk volume per farm. Monthly BTSCC and milk volume records from 84% (in 2012; n=1,308) and 77% (in 2013; n=1,200) of the 130 dairy farms in Florida were used. Data were analyzed separately per year. We calculated arithmetic averages of the BTSCC for each farm (ASCCf), each month (ASCCm), and each year (ASCCy). We used the milk volume to calculate a milk-weighted average for each farm (WSCCf), each month (WSCCm), and each year (WSCCy). Period 1 (P1) was defined as February, March, and April, and period 2 (P2) was defined as August, September, and October. These periods generally had the lowest and highest BTSCC throughout the year, respectively. Seasonality was expressed by the P2/P1 ratios of BTSCC and milk volume in both periods. In 2012 and 2013, 72 and 74% of the monthly milk volume observations were <400,000cells/mL. A clear seasonal pattern with lower milk volume and higher ASCCm during P2 was observed for most farms. The averages of the P2/P1 ratio of milk volume were 0.68 and 0.74 in 2012 and 2013. The averages of the P2/P1 ratio of SCC were 1.30 and 1.65 for 2012 and 2013, respectively. The WSCCy was 297,000 cells/mL in 2012 and 274,000 cells/mL in 2013. These values were 13 and 16% lower than the ASCCy in the respective years. In 2012, 82% of the farms shipped milk with a lower WSCCf than their ASCCf. In 2013, 97% of the farms shipped milk with a lower WSCCf than their ASCCf. The difference between a farm's WSCCf and its ASCCf tended to be greater in more-seasonal farms for BTSCC and milk volume. The WSCCm was lower than the ASCCm in every calendar month in both years. Collectively, these results show that the SCC of pooled milk from Florida was substantially lower than the arithmetic averages of monthly BTSCC values. Therefore, it should be made clear if the SCC is weighted by milk volume when "average" SCC results are reported. Programs to improve milk quality in Florida might be focused on conditions during August, September, and October because the BTSCC is then markedly increased on many farms.

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Section: Seasonality Of Btscc and Milk Volumementioning

confidence: 51%

Effects of season and herd milk volume on somatic cell counts of Florida dairy farms

Ferreira

Vries

2015

Journal of Dairy Science

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“…AHI has increased Ireland's international standing as a producer of food from animals with superior animal health (More et al . ).…”

Section: Contribution Of Strategy At National Levelmentioning

confidence: 97%

“…AHI expects BVD to be eradicated in Ireland in the near future (Animal-Health-Ireland 2018). AHI has increased Ireland's international standing as a producer of food from animals with superior animal health (More et al 2012).…”

Section: Animal Health Irelandmentioning

confidence: 99%

The Irish dairy industry – Recent history and strategy, current state and future challenges

Kelly

Shalloo

Wallace

et al. 2020

Int J of Dairy Tech

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This study explores drivers and resulting changes in the structure and technical efficiency of Irish dairy farms from 2005 to 2018 (covering pre‐ and post‐milk quotas) during which milk production increased by 54%. Over this period, farm structure changed dramatically (fourfold increase in farmers milking >100 cows) and farmers improved technical efficiency and profitability and reduced the greenhouse gas emission intensity of milk produced. The impact of the adoption of key technologies at farm level and the contribution of strategic direction nationally (the Irish Government's Food Harvest 2020 Strategy) influencing this development are explored as are future sector challenges.

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“…Mastitis is an important challenge to dairy production internationally. In Ireland, the problem is well understood (More et al, 2012), and considerable work has been undertaken to quantify the economic losses associated with mastitis, both to farmers (Geary et al, 2012) and the processing industry (Geary et al, 2013). In addition to direct monetary concerns, mastitis can adversely affect cow welfare (Medrano-Galarza et al, 2012) and farm management (Jansen et al, 2010), increase the risk of antimicrobial residues (van Schaik et al, 2002), and adversely affect product quality and the international reputation of milk and milk products (More, 2009).…”

Section: Introductionmentioning

confidence: 99%

The use of national-level data to describe trends in intramammary antimicrobial usage on Irish dairy farms from 2003 to 2015

Clegg

McCoy

2017

Journal of Dairy Science

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In this study, we used national-level data to describe trends in on-farm intramammary antimicrobial usage in Ireland from 2003 to 2015. We calculated actual sales of intramammary tubes and the quantity of active substance sold, by year, product type [lactation or dry cow therapy (DCT)], antimicrobial group, World Health Organization antimicrobial classification, and from 2009 to 2015, prescribing route. We also estimated on-farm usage of lactation and dry cow intramammary antimicrobials using defined daily dose (DDDvet) and defined course dose (DCDvet) calculations, and dry cow coverage. Sales of tubes of antimicrobial for DCT have increased, and the estimated national dry cow coverage in 2015 was 1,022 DCDvet per 1,000 cows per year. An increase has also occurred in sales of teat sealant (2015 sales: 66.7 tubes with teat sealant for every 100 tubes with antimicrobial for DCT). In contrast, the number of tubes of antimicrobial sold for lactation use has decreased to 1,398 DDDvet and 466 DCDvet per 1,000 animals per year. Sales in intramammary tubes with at least one critically important antimicrobial (CIA) have either risen since 2007 (DCT) or fallen (lactation therapy). Increases were observed in both the number of dry cow and lactation tubes containing CIA considered of highest priority for human health. Differences between prescribing routes with respect to CIA usage were observed. This study provides detailed insight into on-farm usage of intramammary antimicrobials in Ireland. It demonstrates positive national progress but also highlights areas for review. In particular, blanket dry cow treatment in Ireland should be reconsidered. It is not possible to investigate farm-level variation in antimicrobial usage from national sales data. In several countries, measurement and benchmarking have been critical to progress in reducing antimicrobial usage in farm animal production. Central collation of data on farm-level antimicrobial use is also needed in Ireland to allow objective measurement and benchmarking of on-farm usage. More generally, standardized indicators to quantify antimicrobial usage in farm animals are urgently needed to allow country-level comparisons.

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Insights into udder health and intramammary antibiotic usage on Irish dairy farms during 2003-2010

Cited by 27 publications

References 33 publications

Effects of season and herd milk volume on somatic cell counts of Florida dairy farms

Effects of season and herd milk volume on somatic cell counts of Florida dairy farms

The Irish dairy industry – Recent history and strategy, current state and future challenges

The use of national-level data to describe trends in intramammary antimicrobial usage on Irish dairy farms from 2003 to 2015

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