ID#: 21326
Caption:
This Petri dish culture plate contained Thayer-Martin growth medium, to which the reagent, N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) had been added. The plate was then inoculated with a bacterial culture obtained from a cervical specimen, harvested from a suspected gonorrhea patient. As you can see, after having been incubated for an unspecified length of time, the plate produced numerous, tiny, purple-black bacterial colonies, indicative of a positive oxidase test. Neisseria gonorrhoeae bacteria are oxidase-positive, possessing the enzyme cytochrome c oxidase, and are therefore, able to oxidize TMPD, producing this purple-black coloration.
High Resolution: Click here for hi-resolution image (12.37 MB)
Content Provider(s): CDC
Creation Date:
Photo Credit:
Links:
Categories:
CDC Organization
Skip Navigation Links.

MeSH
Skip Navigation Links.
Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.