Details - Public Health Image Library(PHIL)

ID#:

11999

Caption:

This photograph depicted a QUAD Plate containing a xanthine growth media, upon which Gram-positive, Nocardia, and Streptomyces bacterial colonies were grown. The results here, were two positive, i.e., the ability for the organisms to decompose xanthine, and two negative growth patterns. Positive results included a clear halo around the colonies, while a negative result manifests as an absence of this clear halo, and instead, one will note the deposition of a melanin-like pigment. These colonies were grown in an aerobic environment, which means these organisms thrive in the presence of oxygen.

High Resolution:

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Content Provider(s):

CDC/ Dr. David Berd

Creation Date:

1972

Photo Credit:

Links:

Categories:

CDC Organization