dc.contributor.author
Pieper, L.
dc.contributor.author
Godkin, A.
dc.contributor.author
Rösler, Uwe
dc.contributor.author
Polleichtner, Angela
dc.contributor.author
Slavic, D.
dc.contributor.author
Leslie, K. E.
dc.contributor.author
Kelton, D. F.
dc.date.accessioned
2018-06-08T04:14:19Z
dc.date.available
2014-05-08T09:13:45.168Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/16874
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-21055
dc.description.abstract
Prototheca spp. are algae that cause incurable acute or chronic mastitis in
dairy cows. The aim of this case-control study was the identification of cow-
and herd-level risk factors for this unusual mastitis pathogen. Aseptically
collected composite milk samples from 2,428 milking cows in 23 case and 23
control herds were collected between January and May 2011. A questionnaire was
administered to the producers, and cow-level production and demographic data
were gathered. In 58 of 64 isolates, Prototheca spp. and Prototheca zopfii
genotypes were differentiated using PCR and matrix-assisted laser
desorption/ionization time-of-flight mass spectrometry. All isolates were
identified as Prototheca zopfii genotype 2. The mean within-herd prevalence
for Prototheca spp. was 5.1% (range 0.0-12.5%). Case herds had a significantly
lower herd-level prevalence of Staphylococcus aureus and a higher prevalence
of yeasts than did control herds. The final logistic regression model for
herd-level risk factors included use of intramammary injections of a non-
intramammary drug [odds ratio (OR) = 136.8], the number of different
injectable antibiotic products being used (OR = 2.82), the use of any dry cow
teat sealant (external OR = 80.0; internal OR = 34.2), and having treated 3 or
more displaced abomasums in the last 12 mo OR = 44.7). The final logistic
regression model for cow-level risk factors included second or greater
lactation (OR = 4.40) and the logarithm of the lactation-average somatic cell
count (OR = 2.99). Unsanitary or repeated intramammary infusions, antibiotic
treatment, and off-label use of injectable drugs in the udder might promote
Prototheca udder infection.
de
dc.rights.uri
http://jds.fass.org/misc/ifora.shtml
dc.subject.ddc
600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft
dc.title
Herd characteristics and cow-level factors associated with Prototheca mastitis
on dairy farms in Ontario, Canada
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Journal of Dairy Science. - 95 (2012), 10, S. 5635-5644
dc.identifier.sepid
29319
dcterms.bibliographicCitation.doi
10.3168/jds.2011-5106
dcterms.bibliographicCitation.url
http://dx.doi.org/10.3168/jds.2011-5106
refubium.affiliation
Veterinärmedizin
de
refubium.affiliation.other
Institut für Tier- und Umwelthygiene
refubium.mycore.fudocsId
FUDOCS_document_000000020296
refubium.note.author
Verlags-PDF muss verwendet werden:
http://www.sherpa.ac.uk/romeo/issn/0022-0302/
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000003538
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
00220302