Environmental Gram-Positive Mastitis Treatment: In Vitro Sensitivity and Bacteriologic Cure

摘要

A clinical trial was conducted in a large dairy herd to determine the efficacy of intramammary pirlimycin hydrochloride administration during lactation for bac - teriologic 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-neg- ative staphylococci resulted in inadequate power to as - sess treatment differences in cure rate.