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Ruth N. Zadoks and Jeffrey Watts. Vet Micro, 2009

DNA sequence-based identification of coagulase negative staphylococci is the most accurate species identification methods available because of the large reference database and because a universally meaningful quantitative measure is determined.

Wenz, J.R. et al. JAVMA 219: 976-981

A substantial number of cows categorized with severe clinical mastitis are bacteremic. Classification of the severity of acute clinical mastitis is important for the establishment of effective treatment protocols. Parenteral antibiotic treatment may be indicated for cows with severe acute clinical mastitis.

Bradley et al. Journal of Clinical Microbiology 39: 1845-1849

Certain strains of Escherichia coli may be more capable of causing persistent infection than others. Recurrent cases caused by the same genotype tend to be less clinically severe and more adapted to the udder environment.

Ruth Zadoks et al. Journal of Dairy Science 84(12): 2649-63

Cows with somatic cell counts less than 20,000 cells/ml can be at risk for clinical mastitis caused by E. coli since there are fewer immune cells present initially in the udder to fight the bacterial invasion.

Ynte Schukken et al. Veterinary Research 34:579-596 2003

New infections are the driving force of mastitis dynamics in a dairy herd. New infections may be monitored by following cell counts over time.

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