The use of the dry cow therapy in the control of bovine mastitis

Jánosi, Szilárd; Huszenicza, G.

doi:10.17221/7853-vetmed

Cited by 7 publications

(8 citation statements)

References 49 publications

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“…It is still considered to be the most effective practice for eliminating existing, mainly contagious, IMI during the early dry period, even in herds with a low cell count 28 . Its efficacy and advantages are well known 4,6,17,19,24,33,46 . Mastitogenic pathogens that were highly susceptible to antibiotics were practically eliminated from the cow population while at the same time resistant bacteria became dominant.…”

Section: The Effect Of Product Composition On Cure Ratementioning

confidence: 99%

Intramammary infection rate during the dry period in cows that received blanket dry cow therapy : efficacy of 6 different dry-cow intra-mammary antimicrobial products

Petzer¹,

Lourens²,

Schans³

et al. 2009

J. S. Afr. Vet. Assoc.

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The objectives of this study were to compare the efficacy of 6 different dry-cow intramammary antimicrobial products for the treatment and prevention of mastitis during the dry period in a well-managed high producing Friesland dairy herd, and the influence of treatment on the somatic cell count (SCC) of cows during early lactation. One of 6 dry-cow intramammary antimicrobial products was randomly allocated to 162 cows due for drying off over a period of 14 months. All cows were sampled twice prior to drying off, and twice after calving for the determination of SCC and presence of microorganisms. The quarter prevalence of pathogens at drying off and post-calving, the overall quarter cure rate and the rate of new intramammary infections occurring during the dry period were determined. The overall quarter prevalence of intramammary infections (IMIs) at drying off was 29.78 % and after calving 22.22 %.There was a statistically significant difference (P < 0.05) between the prevalence of major and minor pathogens at drying off (7.87 % and 21.91 %) and at calving (4.47 % and 17.75 %). The most prevalent pathogens isolated at drying off (21.14 %) and at calving (16.98 %) were coagulase-negative staphylococci (CNS). The quarter cure rate during the dry period was 83.94 %. The cure rate for the major pathogens (98%) was significantly better (P < 0.05) than that for minor pathogens (78.9 %).The overall quarter cure rate varied from 72.3 % to 93.9 % for the various products. The rate of new quarter infections during the dry period was 17.44 % with a significant difference (P<0.05), between the prevalence of new quarter infections with major (4.32 %) and minor pathogens (13.12 %). CNS was the most prevalent pathogen causing new quarter infections (12.34 %) and the rate o f new quarter infections varied from 13.4 % to 24.1 % for the various products.It is concluded that there is a difference in efficacy between antimicrobial intramammary dry-cow products in their ability to cure and prevent new IMIs during the dry period. Dry-cow products are mainly formulated for efficacy against Gram-positive cocci, while providing no or little protection against Gram-negative bacteria. Therapeutic levels may persist for only 14 to 28 days into the dry period and fail to protect the udder during the last trimester. Dry-cow therapy should, however, always form part of a holistic approach to the dry period which also considers cow factors, dry-cow management, microorganisms and the environment of the dry cow.

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Section: The Effect Of Product Composition On Cure Ratementioning

confidence: 99%

Intramammary infection rate during the dry period in cows that received blanket dry cow therapy : efficacy of 6 different dry-cow intra-mammary antimicrobial products

Petzer¹,

Lourens²,

Schans³

et al. 2009

J. S. Afr. Vet. Assoc.

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“…Another cause for the increase in SCC could have been the fact that with the dry period shorter than recommended the glandular tissue of the udder of cows did not fully regenerate before the subsequent lactation. Thus, it is believed that the udder of healthy cows requires at least a 40‐day dry period to fully regenerate (Jánosi and Huszenicza, 2001), whereas in cows which suffered from mastitis during lactation this period should be extended to 3 months (Barrett, 2002). Enevoldsen and Sørensen (1992), compared under experimental conditions the effect of dry periods with the lengths of 4, 7 and 10 weeks on the incidence of the clinical form of mastitis and found slightly fewer cases for the 7‐week dry period in comparison to the other options.…”

Section: Length Of Dry Periodmentioning

confidence: 99%

Factors Affecting Somatic Cell Count in Cow Bulk Tank Milk – A Case Study from Poland

Skrzypek¹,

Wójtowski²,

Fahr

2004

Journal of Veterinary Medicine Series A

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The aim of this paper was a retrospective analysis of factors affecting the somatic cell count (SCC) in cow bulk tank milk. The investigations concerned the year 2000 and were conducted on 212 family dairy farms in the Wielkopolska region (Western Poland). The average herd size was 13.3 cows (ranging from 5 to 48), whereas the mean SCC was 269,000 in 1 cm3 of milk (ranging from 63,000 to 631,000). In the period from July to September a higher SCC (P < or = 0.01) was found than in the other months. In herds of more than 15 cows, higher SCC values (P < or = 0.05) were observed than in the smaller herds. The following management and technological factors significantly decreased SCC: a 7-8-week dry period (versus shorter period), foremilking with the use of a forestripper, practicing manual udder massage before milking, individual rationing of feeds according to production, and the application of MgO and beta-carotene additives to the feed ration.

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“…Therapy with antibiotics during dry period is beneficial as there is no need to remove milk from treated quarters. Antibiotics are applied near the end of lactation [141] and may persist in the udder in high concentrations to destroy pathogenic bacteria for 20-70 days. The applied antibiotic has enhanced penetration capacity because of long time contact and curing intramammary infections unless resistance to novel antibiotics is developed by the entering pathogen [142].…”

Section: Dry Cow Therapymentioning

confidence: 99%

Bovine Mastitis and Its Therapeutic Strategy Doing Antibiotic Sensitivity Test

Mk¹

2017

Austin J Vet Sci & Anim Husb

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Mastitis is one of the most costly devastating diseases in the dairy industry. Bovine mastitis can be classified as clinical or subclinical based on clinical features of the disease. Subclinical mastitis occurrence is more prominent compared to clinical form and its prevalence is more than 20 to 50% of cows in given herds. Both forms cause substantial financial losses due to reduced milk yield, degraded milk quality, drug costs and veterinary expenses, early culling of cows and increased labour costs for the farmers. The chief causal organisms of mastitis are cell-walled bacteria, even though mycoplasma, algae and yeast have also been identified to cause mastitis. Numerous influencing factors like physiological, pathological, environmental or genetic factors may contribute to the occurrence of mastitis in dairy cattle. Presently, different types of antibiotics are prescribed for the treatment of mastitis. However, therapeutic success rate of mastitis is generally poor because of pathological changes in the udder parenchyma, mastitogenic bacterial and related factors, indiscriminate use of antibiotics and poor animal husbandry practices. These evidences focus the necessity for discovering completely newer strategies for treatment of mastitis. This review will highlight the key etiological agents and factors affecting the manifestation of mastitis, and the recent advancement of therapeutic strategies including application of antibiotic-based therapies by doing antibiotic sensitivity test as a prospective approach to prevent and control mastitis in dairy herds.

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The use of the dry cow therapy in the control of bovine mastitis

Cited by 7 publications

References 49 publications

Intramammary infection rate during the dry period in cows that received blanket dry cow therapy : efficacy of 6 different dry-cow intra-mammary antimicrobial products

Intramammary infection rate during the dry period in cows that received blanket dry cow therapy : efficacy of 6 different dry-cow intra-mammary antimicrobial products

Factors Affecting Somatic Cell Count in Cow Bulk Tank Milk – A Case Study from Poland

Bovine Mastitis and Its Therapeutic Strategy Doing Antibiotic Sensitivity Test

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