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Bacillus spp. are environmental, Gram-positive, endospore-forming pathogens that can cause mastitis. Bacillus spp. will grow large, slightly gray colonies with irregular edges that are often surrounded by a clear zone of hemolysis when grown on blood agar. Some Bacillus spp. can cause acute and potentially fatal gangrenous mastitis. Spores from Bacillus are heat- and chemical-resistant.
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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 11, 2016