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OJVRTM
Online Journal of Veterinary Research©
Volume 11 (2) : 67-79 2007
Self-Cure rates in American Dairy Cows infected
with Staphylococcus aureus at Drying Off
Reeve-Johnson
L1, Nickerson SC2
Veterinary Pharmacology,
School of Veterinary Science, University of Queensland, QLD 4072, Australia and
Edgar L. Rhodes Center for Animal and Dairy Science, University of Georgia,
Athens 30602, USA
ABSTRACT
Reeve-Johnson
L, Nickerson SC, Self-Cure rates in Dairy Cows infected with Staphylococcus
aureus at Drying Off, Online J Vet Res, 11 (2) : 67-79, 2007.
In a large multicentric study,
several factors were demonstrated to be linked to the ability of dairy cows to
spontaneously or self cure (without dry cow therapy) over the nonlactating
period from natural intramammary infections (IMI) caused by Staphylococcus aureus. These factors
included parity of cow, somatic cell count (SCC), site-specific factors, length
of dry period, and the number of quarters initially infected. A predictive
model was developed for the likelihood of self cure based upon the SCC of cows
at dry-off to aid the prioritization of treatment or culling decisions.
Key words: dry period, mastitis, self-cure,
Staphylococcus aureus)