ID#: 12377
Caption: This photograph depicts the colonial morphology displayed by Gram-positive, Bacillus cereus bacteria, which was grown on a medium of sheep’s blood agar (SBA), for a 24-hour time period, at a temperature of 37°C. Worthy of note, is the hemolytic reaction caused by these bacteria, as evidenced by the faded, hazy coloration surrounding these colonies. It is within this region of faded red color, that the red blood cells in the SBA medium, had been lysed, or destroyed by chemical by-products produced by these organisms, thereby, liberating their intracellular hemoglobin. See PHIL 12378, for a closer view of these bacterial colonies, and this hemolytic reaction.
High Resolution: Click here for hi-resolution image (14.94 MB)
Content Providers(s): CDC/ Amanda Moore, MT; Todd Parker, PhD; Audra Marsh
Creation Date: 2010
Photo Credit: Pete Seidel
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.