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OJVRTM
Online Journal of Veterinary Research©
(Including Medical and Laboratory Research)
Established 1994
ISSN 1328-925X
Volume 29 (7): 417-432, 2025.
Self-cure mastitis in dairy cows infected by Staphylococcus aureus.
Reeve-Johnson L, Nickerson SC
Goyd Project Solutions, Australia and Edgar L. Rhodes Center for Animal and
Dairy Science, University of Georgia, Athens, USA
ABSTRACT
Reeve-Johnson L, Nickerson SC, Self-cure mastitis in dairy
cows infected by Staphylococcus aureus. Onl J Vet
Res., 29 (7): 417-432,
2025. We report dairy cow self cure rate from Staphylococcus
aureus intramammary infection in 10 herds in 5 US
locations. These included parity of cow, somatic cell count (SCC),
site-specific factors, length of dry period, and number of quarters initially
infected. Herds with a history of S.
aureus infection were screened for past bacteriology and somatic cells and S. aureus > 15%,.
Self-cure rate in primiparous cows was 13.1%,
compared with 5.2% in multiparous above the first quartile, cure rate only
<8%. Primiparous cows with SCC <1.25 x 106 had self cure rate of 37.5%. Before Dry-Off infected QSCC
were 1st quartile 0 to 1140 x
103/mL; 2nd 1141 x 103 to 3187 x 103/mL,
3rd 3188 x103 to 8514 x 103/mL, and 4th
quartile > 8514 x 103/mL. Lower number
of S. aureus-infected cows in herds
enhanced cure rate in primiparous and multiparous cows.
Key words: dry
period, mastitis, self-cure, Staphylococcus aureus.
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