Influence of feeding level after drying off on incidence of mastitis and keratin plug formation in dairy cows

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dc.contributor.authorSummers, Emma Louiseen_NZ
dc.contributor.authorLacy-Hulbert, S.J.en_NZ
dc.contributor.authorWilliamson, J.H.en_NZ
dc.contributor.authorSugar, B.P.en_NZ
dc.date.accessioned2016-12-02T03:41:53Z
dc.date.available2004en_NZ
dc.date.available2016-12-02T03:41:53Z
dc.date.issued2004en_NZ
dc.description.abstractTwo groups of 70 cows, including 51 identical twin sets, were grazed at either an unrestricted (14 kg dry matter intake/day; DMI/d) or restricted (6 kg DMI/d) daily pasture allowance for two weeks after drying off (DO). Incidence of new intramammary infection (IMI) and teat open/closed status was assessed at 7, 14 and 21 days after DO. Keratin plug formation was determined on a subset of 40 cows at 7 and 14 days after DO. Number of clinical mastitis (CM) cases and total new IMI did not differ between cows maintained on unrestricted or restricted DMI. However Streptococcus uberis was isolated from more new IMI in unrestricted animals than restricted animals (11.7% vs. 4.6 % of quarters respectively; P <0.01). At 7 and 14 days after DO, more teats were classified as open in the unrestricted group compared to the restricted animals (57% vs. 43% of quarters respectively; P <0.01). However weight of keratin collected from teat canals did not differ between nutritional treatments. Results suggest that unrestricted nutrition after DO did not increase risk of CM but does increase risk of S. uberis infection.
dc.format.mimetypeapplication/pdf
dc.identifier.citationSummers, E. L., Lacy-Hulbert, S., Williamson, J. H., & Sugar, B. P. (2004). Influence of feeding level after drying off on incidence of mastitis and keratin plug formation in dairy cows. In Proceedings of the New Zealand Society of Animal Production (pp. 48–52).en
dc.identifier.urihttps://hdl.handle.net/10289/10784
dc.language.isoen
dc.relation.isPartOfProceedings of the New Zealand Society of Animal Productionen_NZ
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
dc.subjectdrying off
dc.subjectmastitis
dc.subjectkeratin
dc.subjectDMI
dc.subjectnutrition
dc.titleInfluence of feeding level after drying off on incidence of mastitis and keratin plug formation in dairy cowsen_NZ
dc.typeConference Contribution
pubs.begin-page48
pubs.elements-id143131
pubs.end-page52
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/FSEN
pubs.organisational-group/Waikato/FSEN/School of Science
pubs.volume64en_NZ
uow.verification.statusverified
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