Article
Agriculture, Dairy & Animal Science
Justine E. Britten, Kerry A. Rood, David J. Wilson
Summary: In this study, intramammary infusion of casein hydrolysate was investigated as an alternative to antibiotic therapy for dairy cattle mastitis during the dry period. The results suggest that casein hydrolysate infusion alone or in combination with internal teat sealant may be effective in improving mammary involution and milk quality. This approach shows promise as a potential adjunct to antibiotic dry cow therapy.
Article
Infectious Diseases
Sharif S. Aly, Emmanuel Okello, Wagdy R. ElAshmawy, Deniece R. Williams, Randall J. Anderson, Paul Rossitto, Karen Tonooka, Kathy Glenn, Betsy Karle, Terry W. Lehenbauer
Summary: The use of intramammary antibiotics and internal teat sealants during the dry period does not have a significant effect on preventing mastitis in dairy cows.
Article
Agriculture, Dairy & Animal Science
Che-Hsuan Huang, Ikuho Fujihara, Nobuyuki Kusaba
Summary: This research evaluates the impact of SDCT on dry period IMI dynamics in Japan and considers the effects of management factors. The results show that SDCT reduces antibiotic use, but quarters with a low risk of infection have a slightly higher prevalence of IMI when no antibiotics are used. Additionally, poor herd hygiene and a shorter duration of external teat sealant adherence increase the risk of IMI in quarters without antibiotics.
ANIMAL SCIENCE JOURNAL
(2022)
Article
Agriculture, Dairy & Animal Science
Sam Rowe, Fidele Kabera, Simon Dufour, Sandra Godden, Jean-Philippe Roy, Daryl Nydam
Summary: The implementation of selective dry-cow therapy can enhance antibiotic stewardship on dairy farms. This study aimed to evaluate the impact of culture-guided and algorithm-guided selective dry-cow therapy on udder health and performance. The findings suggest that both culture-guided and algorithm-guided selective dry-cow therapy can be successfully implemented in cows with different milk production levels.
JOURNAL OF DAIRY SCIENCE
(2023)
Review
Agriculture, Dairy & Animal Science
Kayley D. McCubbin, Ellen de Jong, Theo J. G. M. Lam, David F. Kelton, John R. Middleton, Scott McDougall, Sarne De Vliegher, Sandra Godden, Paivi J. Rajala-Schultz, Sam Rowe, David C. Speksnijder, John P. Kastelic, Herman W. Barkema
Summary: Blanket dry cow therapy may no longer be necessary for all dairy farms due to improvements in udder health and the introduction of teat sealants. Selective dry cow therapy (SDCT) can be a viable option for maintaining udder health and milk production while improving antimicrobial stewardship. Methods for selecting cows or mammary quarters for treatment include somatic cell count thresholds, pathogen identification, clinical mastitis history, or a combination of criteria. Concurrent teat sealant use is recommended, especially in quarters not receiving intramammary antimicrobials.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
S. M. Rowe, D. Nydam, S. M. Godden, P. J. Gorden, A. Lago, A. K. Vasquez, E. Royster, J. Timmerman, M. J. Thomas, R. A. Lynch
Summary: The study utilized partial budget analysis to estimate the cash impact of switching from blanket dry cow therapy (BDCT) to culture- or algorithm-guided selective dry cow therapy (SDCT) for herds. The findings suggest that SDCT may be a cost-effective practice for US herds under a range of economic conditions when implemented appropriately.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Monika Dziuba, Luciano S. Caixeta, Brett Boyum, Sandra Godden, Erin Royster, Sam Rowe
Summary: Blanket dry cow therapy is a major contributor to antibiotic usage on US dairy farms. This study suggests that using internal teat sealants alone as an alternative to blanket therapy can be a practical option for well-managed herds. The omission of blanket therapy can have a negative effect on cow health and welfare.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
S. McDougall, J. Penry, D. Dymock
Summary: The study indicated that bacterial isolates from organic herds had lower antibiotic resistance compared to herds using dry cow therapy (DCT). However, the differences in MIC distributions occurred below clinical breakpoints, suggesting that bacteriological cure rates may not be affected by isolates with different MIC levels.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Kayley D. Mccubbin, Ellen de Jong, Carmen M. Brummelhuis, Julia Bodaneze, Marit Biesheuvel, David F. Kelton, Tamaki Uyama, Simon Dufour, Javier Sanchez, Daniella Rizzo, David Leger, Herman W. Barkema
Summary: Infections with antimicrobial resistant pathogens pose a major threat to human and animal health worldwide. Reducing antimicrobial use in livestock, particularly in Canadian dairy farms, is crucial. Selective dry cow therapy and the use of teat sealants show promise in decreasing antimicrobial usage. Understanding the current practices can help identify areas for intervention to further reduce antimicrobial use.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
S. M. Rowe, S. M. Godden, E. Royster, J. Timmerman, M. Boyle
Summary: This prospective cohort study explored the associations between intramammary infection in late-lactation cows and postcalving udder health and productivity. Late lactation IMI was found to increase the risk of clinical and subclinical mastitis in the subsequent lactation, leading to decreased milk yield. Different pathogens causing IMI may have varied effects on postcalving health and productivity.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
J. M. Swinkels, K. A. Leach, J. E. Breen, B. Payne, V. White, M. J. Green, A. J. Bradley
Summary: This study compared the effectiveness of quarter-level and cow-level antibiotic dry cow treatment in six herds in the UK with environmental mastitis. The results showed that selectively treating only specific infected quarters in high cell count cows can reduce antibiotic use without affecting postcalving infection status, while treating quarters with a certain CMT score in low cell count cows can reduce the odds of being infected with minor mastitis pathogens postcalving. Overall, quarter-level treatment may be a more targeted and efficient approach for reducing antibiotic usage in dry cows.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Jim Weber, Stefan Borchardt, Julia Seidel, Ruben Schreiter, Frederike Wehrle, Karsten Donat, Markus Freick
Summary: The study evaluated the efficacy of selective dry cow treatment compared to blanket dry cow treatment in dairy cows in terms of udder health and antibiotic use, finding no significant difference between the two methods. Selective dry cow treatment seems to be a suitable alternative to reduce antibiotic use while maintaining udder health.
Article
Agriculture, Dairy & Animal Science
S. McDougall, J. Williamson, J. Lacy-Hulbert
Summary: The choice between using cow composite somatic cell count (SCC) or California Mastitis Test (CMT) score at quarter level for the selection of antimicrobial treatment at the end of lactation has varying impacts on cure rates, risk of new infection, and post-calving infection prevalence.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
B. Krattley-Roodenburg, L. J. Huybens, M. Nielen, T. van Werven
Summary: The study aimed to investigate the effects of different management practices on udder health during the dry period, and found that factors such as reducing milk yield before dry-off, correct use of antimicrobials, and adherence to guidelines can help reduce the risk of new high SCC. The research also showed that farmers can balance limited use of antimicrobials at dry-off with management measures to maintain good udder health during the dry period.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
S. M. Rowe, A. K. Vasquez, S. M. Godden, D. Nydam, E. Royster, J. Timmerman, M. Boyle
Summary: The study aimed to compare 4 cow-level algorithms for predicting intramammary infection in late-lactation US dairy cows, and estimate the potential reduction in antibiotic use at dry-off. The algorithms showed potential to reduce antibiotic use by 37-69%, but had poor agreement with actual infection status.
JOURNAL OF DAIRY SCIENCE
(2021)