Selective dry-cow therapy can be implemented successfully in cows of all milk production levels

Rowe, Sam; Kabera, Fidèle; Dufour, Simon; Godden, Sandra; Roy, Jean-Philippe; Nydam, D.V.

doi:10.3168/jds.2022-22547

Cited by 8 publications

(5 citation statements)

References 32 publications

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“…This average includes milk produced by cows with mastitis under treatment. 3 Dry period length. 4 Dairy herd improvement testing frequency per year.…”

Section: Methodsmentioning

confidence: 99%

“…Increased frequency of antimicrobial resistance affects both human and veterinary medicine and should not be underestimated in food-producing animals [1]. It is suggested that selective dry-cow therapy (SDCT) in the dairy sector is one of the measures that should be implemented for a more controlled usage of antibiotics [2,3]. With SDCT, only cows or quarters with existing intramammary infection (IMI) are selected for treatment with intramammary antimicrobials during dry-off [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…There has been limited research exploring what Italian farmers know and think about SDCT. Research in other countries has demonstrated that SDCT can be accomplished without negative consequences on udder health [3,8,9]. It may be beneficial to understand how Italian farmers apply SDCT, how it affects udder health, and the hurdles during the adoption process.…”

Section: Introductionmentioning

confidence: 99%

“…Subclinical mastitis 2. Dairy herd improvement testing 3. Udder health indicators (healthy, new infection, chronic, and cured cows) were analyzed according to[13].…”

mentioning

confidence: 99%

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Approach to Selective Dry Cow Therapy in Early Adopter Italian Dairy Farms: Why Compliance Is So Important

Guadagnini,

Gogna,

Tolasi

et al. 2023

Animals

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Selective dry-cow therapy (SDCT) became mandatory in Italy on 28 January 2022. During 2020, a group of farms involved in a milk quality program began a pilot experiment with SDCT in order to understand its challenges and to identify areas for procedural improvements. The aim of this study was to describe the challenges and results of the SDCT in early adopters’ herds with a special focus on treatment compliance. Retrospective data from 1911 cows from 11 dairy herds were evaluated. Somatic cell counts, clinical mastitis (CM) history, and the California Mastitis Test (CMT) were used as criteria for SDCT. Based on the dairy herd improvement test results and CM history, 48% of all cows should have received antibiotic treatments and internal teat sealants. Adding the CMT at dry-off increased the percentage of antibiotic-treated cows to 62%, with relevant variation among farms. Concerning treatment compliance, 21% of the cows were “non-compliant”, suggesting the importance of monitoring treatment compliance. In conclusion, even if commonly used selection criteria for antibiotic treatments were used, the need for more education and in-depth monitoring of the SDCT adoption process was clearly identified. Close collaboration and agreement between veterinarians and farmers are key for SDCT adoption success.

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“…This average includes milk produced by cows with mastitis under treatment. 3 Dry period length. 4 Dairy herd improvement testing frequency per year.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Subclinical mastitis 2. Dairy herd improvement testing 3. Udder health indicators (healthy, new infection, chronic, and cured cows) were analyzed according to[13].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Approach to Selective Dry Cow Therapy in Early Adopter Italian Dairy Farms: Why Compliance Is So Important

Guadagnini,

Gogna,

Tolasi

et al. 2023

Animals

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“…Jedoch wiesen durch Streptokokken, oder andere Gram-positive Bakterien, verursachte IMI eine signifikant höhere Heilungschance bei TS AB auf [51]. "On-farm Tests" können eine Alternative für die MBU zur Selektion der Kühe für die Trockenstellbehandlung sein [44,[52][53][54][55]. Betriebsindividuelle Vorgehensweisen in Bezug auf den Umgang mit S. aureus-infizierten Kühen sind empfohlen und TS AB ein Teil der Eradikationsprogramme [56,57], weshalb hier auf die MBU nicht verzichtet werden sollte.…”

Section: Diskussion Der Ergebnisseunclassified

Untersuchungen zu einem kontrollierten, entscheidungsbaumbasierten Verfahren des Selektiven Trockenstellens in Bayerischen Milchviehbetrieben

Sonnewald-Daum,

Euchner,

Frost

et al. 2024

Tierarztl Prax Ausg G Grosstiere Nutztiere

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Zusammenfassung Ziel Vier Parameter eines, in einer vorherigen Studie geprüften, Entscheidungsbaumes (EnB) für das Selektive Trockenstellen (TS) wurden auf ihre Selektionsstärke zur Erkennung von antibiotisch trockenzustellenden Kühen (KTV/AB) geprüft. Ebenso, ob alle Parameter (Zellzahlen [ZZ≥200 000 Z/ml] der letzten 3 Milchleistungsprüfungen [MLP] vor dem TS, Mastitis-Historie der Laktation [≥1 MH], mikrobiologische Untersuchung [MBU, 14d vor TS, Major Pathogen-Nachweis] und California-Mastitis-Test [CMT, >Grad 1/+, beim TS]) notwendig sind, Modifikationen als Ersatz der MBU sowie ein vereinfachtes Modell anstatt des EnB ermittelt werden können. Material und Methoden Daten aus 18 bayerischen Milchviehbetrieben von 06/2015 bis 08/2017 wurden deskriptiv sowie mittels kostensensitivem binärem Klassifikationsbaum und logit-Modellen ausgewertet. Der EnB galt als zugrunde liegende Wahrheit. Ergebnisse Einbezogen wurden 848 Trockenstellvorgänge (KTV) von 739 Kühen. ZZ und CMT selektierten 88,1%, in Kombination mit der MH 95,6% der KTV/AB (n=494). Ohne MBU wären 22 (4,4%) der KTV/AB mit Major Pathogen-Nachweis (davon 8x Staphylococcus [S.] aureus) fehlklassifiziert worden. Im Durchschnitt des geometrischen Mittels der ZZ innerhalb 100d vor TS, blieben KTV ohne Befund in der MBU <100 000 Z/ml Milch, mit Minor Pathogen zwischen 100 000–150 000 Z/ml, mit Major Pathogen (ohne S. aureus) ≥150 000 Z/ml. Bei den 2 Selektionskriterien ZZ in der Laktation mind. 1x >200 000 Z/ml und postiver CMT beim TS, wären 37 KTV(4,4%) „falsch nicht“, 43 KTV (5,1%) „unnötig“ für ein antibiotisches TS selektiert worden. Modifikationen, u. a. ZZ <131 000 Z/ml innerhalb 100d vor TS, zur Selektion von KTV ohne Befund/mit Minor Pathogen, wurden ermittelt. Das beste Modell zur Selektion der Trockenstellbehandlung (KTV ohne MH & ZZ <200 000 Z/ml in den letzten 3 MLP) wies Metriken von AUC=0,74, Accuracy=0,78, balanced Accuracy=0,63, Sensitivität=0,92 und Spezifität=0,33 auf. Schlussfolgerungen ZZ, CMT und MH des EnB in Kombination erwiesen sich unter den Bedingungen der vorliegenden Studie als geeignete Selektionskriterien. Eine Herabsetzung der ZZ-Grenzen ist betriebsindividuell sinnvoll, wenn auf die MBU verzichtet werden soll. Das beste Modell konnte den EnB nicht ersetzen.

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Evaluation of a new method of selective dry cow treatment using microbiological culture and antibiogram results

Navaei,

Vojgani,

Khoramian

et al. 2024

Preprint

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Background: Due to financial issues and the rise in antimicrobial resistance, updating dry cow therapy (DCT) methods is still being researched by scientists worldwide. This investigation aimed to evaluate a new method of selective treatment by choosing an appropriate dry ointment for each cow based on the individual culture and antibiogram results and examining its effects on clinical and subclinical mastitis indices, cure rate, new infection rate, and milk yield during the first 30 days in milk (DIM). Results: For this research, a total of 291 Holstein dairy cows were selected from three herds. These cows had a somatic cell count (SCC) > 200,000 (cells/mL) just before the dry period, had positive composite milk culture results, and were gradually dried over five days. The milk samples were taken before dry-off and on the first day after parturition (1 DIM), as well as 3 days before dry-off and between 3 and 7 days postpartum to evaluate SCC. The cows were randomly divided into two groups of control (n = 151) and treatment (n = 140). The control group included cows that were treated with dry cow ointment regardless of the pathogens involved in mammary infection, and the treatment group contained cows that received DCT ointment based on the type of pathogen isolated during culture and the antibiogram results before dry-off. The results revealed that the cure rate in the treatment group was significantly better than in the control group (P = 0.0006). In addition, the rate of new intramammary infections (IMI, P = 0.0006) and the rate of clinical mastitis (P = 0.015) decreased in the first 30 DIM in the treatment group. Nevertheless, SCC and milk yield at the onset of the subsequent lactation did not differ significantly between the control and treatment groups (P > 0.05). Conclusion: According to the findings of our study, based on individual milk culture and antibiogram results, selectively treating cows with appropriate dry ointments had significant benefits for increasing the cure rate of pathogens, lowering the incidence of new IMIs, and minimizing the risk of clinical mastitis in the first 30 DIM.

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Selective dry-cow therapy can be implemented successfully in cows of all milk production levels

Cited by 8 publications

References 32 publications

Approach to Selective Dry Cow Therapy in Early Adopter Italian Dairy Farms: Why Compliance Is So Important

Approach to Selective Dry Cow Therapy in Early Adopter Italian Dairy Farms: Why Compliance Is So Important

Untersuchungen zu einem kontrollierten, entscheidungsbaumbasierten Verfahren des Selektiven Trockenstellens in Bayerischen Milchviehbetrieben

Evaluation of a new method of selective dry cow treatment using microbiological culture and antibiogram results

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