Gram Stain Images
Here are a variety of materials stained according to the Gram stain.
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