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Mastitis cases caused by yeast and mold are typically sporadic and are usually not a significant issue in a herd. Yeast form white or creamcolored colonies that can easily be confused with coagulase-negative staphylococci. Gram staining will differentiate yeast from CNS; yeast are two to three times larger than CNS and typically exhibit budding. Mold colonies can have a fluffy texture and exhibit several different colors.
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Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.
April 15, 2016