The Efficacy of Teat Dips of Differing Persistence on Teat Skin In Preventing Intramammary Infection By Streptococcus Uberis and Escherichia Coli in Dry Cows

Godinho, Kevin; Bramley, A. J.

doi:10.1016/s0007-1935(17)32137-1

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…Some authors indicated no long-lasting effect of post-dips against Sc. uberis than Staphylococcus (S.) aureus, explaining this by saying that S. aureus is not widely distributed in the environment so that once removed by disinfection it rarely leads to a recontamination [49]. This does not explain our results, as coliforms as well as esculin-positive streptococci were frequently found in the dairy's surroundings.…”

Section: Discussionmentioning

confidence: 61%

Bacterial Load of the Teat Apex Skin and Associated Factors at Herd Level

Hohmann¹,

Wente²,

Zhang³

et al. 2020

Animals

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In order to reduce antimicrobial treatment and prevent environmental mastitis, the aim of the present study was to investigate associations between herd level factors and microbial load on teat ends with environmental mastitis pathogens. Quarterly farm visits of 31 dairy farms over a one-year period were used for statistical analysis. During each farm visit, teat-skin swabs, bedding and air samples were taken and management practices and herd parameters were documented. Total mesophilic bacteria, esculin-positive streptococci and coliform bacteria were examined in the laboratory procedures from teat skin and environmental samples. Esculin-positive streptococci and coliform bacteria on teat ends increased with high temperature–humidity indices (THI) in the barn during the spring and summer. Significantly more coliform bacteria on teat ends were found in herds with an increased percentage of normal or slightly rough teat ends. Cleaning cubicles more frequently, pre-cleaning teats before milking as well as post-dipping them after milking had a decreasing effect of teat-skin load with total mesophilic and coliform bacteria at the herd level. To conclude, teat-skin bacterial load with environmental pathogens is subject to fluctuations and can be influenced by aspects of farm hygiene.

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Section: Discussionmentioning

confidence: 61%

Bacterial Load of the Teat Apex Skin and Associated Factors at Herd Level

Hohmann¹,

Wente²,

Zhang³

et al. 2020

Animals

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“…Halogen-based teat dips and conventional concentrations of chlorhexidine digluconate are ineffective in influencing teat contamination with E. coli in the milking interval (23). Efforts have been made to protect the teat surface from bacterial challenge between milkings either by a film barrier(59), by persistent bactericidal action (70), or possibly by a combination of the two (8). The objective is to extend mastitis control to include E. coli and possibly Str.…”

Section: Stages In the Infection Processmentioning

confidence: 99%

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Bramley

Dodd

1984

Journal of Dairy Research

211

115

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Introduction Development of control methods Antibiotic therapy Hygiene Control schemes Milking machine research Mastitis awareness The value of current control methods Aetiology of mastitis Staphylococcus aureus Streptococcus agalactiae Streptococcus dysgalactiae Streptococcus uberis Coliforms Pseudomonas aeruginosa Mycoplasma bovis Corynebacteria General characteristics of bovine mastitis Stages in the infection process Exposure to pathogenic microorganisms CONTENTS PAGE 481 482 482 483 483 484 484 485 486 486 486 487 487 487 488 488 488 489 489 490 Penetration of the teat duct by pathogens Establishment of an intramammary infection Parasite factors Host factors Cellular and immune defence of the udder Nonspecific defence mechanisms Elimination of infections Culling Spontaneous recovery from infection Antibiotic therapy Dynamics of infection in dairy herds Effects of mastitis monitoring systems on awareness and control Conclusions References * Grant aided by the Agricultural and Food Research Council.

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“…An alternative, to the strictly preventive use of DCT, is to apply an internal, or external teat sealer 2 [3,4,27,35,42,44,45,46,73,88]. These sealers can be used in combination with DCT to obtain a preventive and a curative effect [26,45,46,47,68,84].…”

Section: Introductionmentioning

confidence: 99%

Incidence of intramammary infections during the dry period without or with antibiotic treatment in dairy cows – a quantitative analysis of published data

2006

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-The study was aimed at summarising the literature that compares the incidence levels of spontaneously occurring intramammary infections (IMI) during the dry period, without versus with antibiotic dry cow treatment (DCT). A meta-analytic relative risk (RR) calculation was implemented when a priori relevant. Two main categories of comparison were used in the 36 selected papers. In the first category, the udder quarters were randomly allocated (at quarter or cow level) to an untreated or a treated group. Quarter incidence averaged 12.8% (weighted mean) in untreated quarters, and depending on the DCT used, from 6.6 to 8.0% in treated quarters. The meta-analytic RR of new IMI for untreated versus treated quarters varied from 1.54 to 1.94, depending on the DCT used. DCT was mainly found effective against IMI due to streptococci and coagulase-positive staphylococci. Based on only a few papers, the application of an internal teat sealer was associated to a quite similar (or possibly better) protection against IMI than DCT, but only in a subpopulation of particular (selected) cows. In the second category of studies, a selective dry cow or quarter antibiotic-treatment (selective DCT or DQT), according to cow or quarter selection criteria, was compared to blanket DCT. The meta-analytic RR of new IMI was 1.71 for selective DCT versus blanket DCT. Selective DQT seemed to be more at risk than selective DCT, but consisted of treating a much lower proportion of quarters. The summary-results provided by our meta-analysis should only be used with caution, due to possibly low external validity. More research seems to be relevant on the risk factors of new IMI during the dry period to make the outcomes of omission of DCT in selected cows more predictable under field conditions. dairy cow / mastitis / risk / dry-cow treatment / meta-analysis

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The Efficacy of Teat Dips of Differing Persistence on Teat Skin In Preventing Intramammary Infection By Streptococcus Uberis and Escherichia Coli in Dry Cows

Cited by 15 publications

References 13 publications

Bacterial Load of the Teat Apex Skin and Associated Factors at Herd Level

Bacterial Load of the Teat Apex Skin and Associated Factors at Herd Level

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Incidence of intramammary infections during the dry period without or with antibiotic treatment in dairy cows – a quantitative analysis of published data

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