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  • Title: Environmental gram-positive mastitis treatment: in vitro sensitivity and bacteriologic cure.
    Author: Cattell MB, Dinsmore RP, Belschner AP, Carmen J, Goodell G.
    Journal: J Dairy Sci; 2001 Sep; 84(9):2036-43. PubMed ID: 11573783.
    Abstract:
    A clinical trial was conducted in a large dairy herd to determine the efficacy of intramammary pirlimycin hydrochloride administration during lactation for bacteriologic clearance of gram-positive environmental clinical and subclinical mastitis infections. Quarters infected with environmental streptococci that received pirlimycin therapy (13/28) were 1.8 times more likely to resolve infection than untreated quarters (5/14). The small numbers of quarters infected with coagulase-negative staphylococci resulted in inadequate power to assess treatment differences in cure rate. Although the association was not statistically significant, quarters from cows with sensitive environmental streptococci isolates from composite samples (8/13) resolved infection with treatment at approximately twice the rate of treated quarters with resistant isolates (3/10).
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