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Top left: E. coli bacterial colonies grown on TSY agar. Top right:
E. coli growing in a slant tube of TSY. Left: Close up of E. coli colonies on a streak plate of TSY agar.
1. Smiley face drawn in E. coli on MacConkey's agar, 2. Control pinwheel showing lactose-negative, colorless Salmonella (top) and lactose-positive, pink E. coli (bottom); 3. Colonies of Gram-negative bacteria growing on MAC, 4. Three plates of MacConkeys, each with different Gram- bacteria: E. coli top lift, Enterobacter, top right and Salmonella on bottom; 5. Sample from kitchen sink plated on TSY (front) and MAC (back).
1. Mycobacterium smegmatis colonies growing on TSY agar; 2. Streak plate of Mycobacterium smegmatis colonies growing on TSY agar, top view; 3. Streak plate of Mycobacterium smegmatis colonies growing on TSY agar, bottom view; 4 & 5. M. smeg written in the bacteria Mycobacteria smegmatis growing on TSY agar. Note, in close-up photo, the waxy appearance of the bacterial colonies.
Top left: Mannitol Salts Agar (MSA) growing Staphylococcus epidermidis. Top right: MSA growing mannitol fermenting pathogenic halophile S. aureus on left and S. epi on right Left: Punctiform (tiny) bacterial colony morphology of S. epidermidis growing on Mannitol Salt agar.
Bacterial Colony Photos - P2
Page last updated: 8/2015
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More Bacterial Growth Media & Cultures Resources
- Bacterial Colony Morphology and Identification of Unknown Bacteria "class notes"article from Science Prof Online.
- Types of Culture Media for Growing Bacteria "class notes" article.
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More Colonies of Gram Positive Bacteria
Staphylococcus Colonies on Mannitol Salt Agar (MSA)
Colonies of Acid Fast (Waxy) Bacteria
Mycobacterium smegmatis Bacterial Colonies
(Click on photo to enlarge.)
Gram Negative Colonies on MacConkey's Agar
(See more)
Arm plate of TSY agar showing normal flora bacterial growth from skin of the forearm.
VIDEO: How to Interpret MacConkey's Agar (MAC)
Bacterial Growth Medium
VIDEO: How to Interpret Mannitol Salt Agar (MSA) Specialized Bacterial Growth Medium
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