Gram Stain Images ©David B. Fankhauser, Ph.D., Professor of Biology and Chemistry University of Cincinnati Clermont College, Batavia OH 45103
Tongue scraping	This page has been accessed times since 5 January 2005.  5 January 2005	San Francisco sour dough

Here are a variety of materials stained according to the Gram stain.  Click on a thumbnail to see the image enlarged:

Buttermilk:

E. coli:

E. coli and yogurt together:

Sour Cream:

San Francisco Sourdough:  (Note the wild yeast.  There are also assorted bacilli and cocci, presumably lactic acid fermenters.)

Tongue scraping:

Tongue scraping with methylene blue:

Yogurt: