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dc.contributor.authorLopez-Benavides, Mario G.
dc.contributor.authorWilliamson, John H.
dc.contributor.authorLacy-Hulbert, S. Jane
dc.contributor.authorCursons, Raymond T.
dc.coverage.spatialNetherlandsen_NZ
dc.date.accessioned2010-05-03T23:37:23Z
dc.date.available2010-05-03T23:37:23Z
dc.date.issued2009
dc.identifier.citationLopez-Benavides, M.G., Williamson, J.H., Lacy-Hulbert, S.J. & Cursons, R.T. (2009). Heifer teats sprayed in the dry period with an iodine teat sanitizer have reduced Streptococcus uberis teat-end contamination and less Streptococcus uberis intra-mammary infections at calving. Veterinary Microbiology, 134(1-2), 186-191.en
dc.identifier.urihttps://hdl.handle.net/10289/3849
dc.description.abstractHeifers managed under pastoral conditions are at risk from Streptococcus uberis mastitis infections at calving. A total of 397 heifers from six farms around New Zealand were enrolled in a study to identify and enumerate S. uberis on teat-ends of heifers in the peri-partum period, and to understand the effect of teat-spraying in the pre-calving period on the prevalence and incidence of S. uberis mastitis post-calving. Heifers were randomly assigned to Control or Sprayed groups. Sprayed heifers were teat-sprayed once, three times a week (Monday, Wednesday and Friday) with a commercial iodine-based teat sanitizer, starting at 3 weeks prior to calving and ending at day of calving. Across three farms, all glands of cows in both groups were sampled at calving to determine S. uberis intra-mammary infection (IMI) prevalence. For all farms, clinical mastitis (CM) cases detected during the week after calving were sampled and submitted for bacteriological analysis. Swabbing of teat-ends of 54 heifers from one farm showed that heifers had a pre-existing S. uberis contamination averaging 610 colony-forming units per swab (cfu/swab), at 3 weeks prior to calving. At calving, teat-end contamination was 560 cfu/swab for Sprayed heifers and 1775 cfu/swab for Control heifers. Two weeks after calving, teat-end contamination was similar between both groups, at 30 cfu/swab. The prevalence of S. uberis IMI was significantly lower in the Sprayed (3.5% glands) vs. the Control (7.4%) heifers in the first week after calving. There was a trend for Sprayed heifers (3.6% heifers) to have a lower incidence of S. uberis CM compared with Control heifers (7.4% heifers). It is concluded that teat-spraying in the dry period is a management option that could contribute to controlling heifer S. uberis mastitis in the transition period.en
dc.language.isoen
dc.publisherElsevieren_NZ
dc.subjectmastitisen
dc.subjectstreptococcus uberisen
dc.subjectmanagementen
dc.subjecttransition perioden
dc.subjectperi-partumen
dc.subjectteat sprayen
dc.titleHeifer teats sprayed in the dry period with an iodine teat sanitizer have reduced Streptococcus uberis teat-end contamination and less Streptococcus uberis intra-mammary infections at calvingen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.vetmic.2008.09.027en
dc.relation.isPartOfVeterinary Microbiologyen_NZ
pubs.begin-page186en_NZ
pubs.elements-id33465
pubs.end-page191en_NZ
pubs.issue1-2en_NZ
pubs.volume134en_NZ


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