Science Image Library
Bacterial Colonies & Streak Plates



Bacterial Colonies of Normal Flors From Arm Plate

1. Obtaining arm plate sample of normal flora on skin; 2. Normal flora bacterial sample from an arm plate; 3. Close up of normal flora bacterial colonies from arm plate sample; 4 & 5. Touch plates, far shot & near. Tpo plate is unwashed hands, bottom left, washed, bottom right scrubbed soap & alcohol.

Bacillus subtilis 
bacterial colonies grown on TSY agar. These bacteria hare heavily flagellated, so can move. See how colonies spread out in lobes.
1. Micrococcus luteus colonies growing on TSY agar; 2. Streak plate of M. luteus colonies growing on TSY agar, 3, 4 & 5. Arm plate of normal flora of skin. Creamy yellow round colonies are Micrococcus.
Staphylococcus Bacterial Colonies on TSY 
(Click on photo to enlarge.) See more >
​Micrococcus luteus Bacterial Colonies  on TSY 
(Click on photo to enlarge.)
Arm Plate & Touch Plate Bacterial Samples 
(Click on photo to enlarge.)
Science Image Library: Bacterial Colony Photos
Page last updated: 8/2015
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Gram-negative bacterial colonies growing on MacConkey's agar. A pink colony indicates that the bacteria eat the sugar lactose.
Gram-negative bacterial colonies growing on MacConkey's agar. A pink colony indicates that the bacteria eat the sugar lactose.
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Plate of TSY Agar With Bacterial Samples from Dishes Before And After Dishwasher
HOME MICROBIOLOGY EXPERIMENT FROM SPO
Does the automatic dishwasher sanitize dishes? Yes! 
TSY agar with sample from dirty dishes on top (note bacterial colonies that grew), and sample from cleaned dishes on bottom.
​ Bacillus subtilis  bacterial colonies grown on TSY agar
​ Bacillus subtilis  bacterial colonies grown on TSY agar
​ Bacillus subtilis  bacterial colonies grown on TSY agar
Colonies of Gram Positive Bacteria
​Bacillus subtilis Bacterial Colonies on TSY
Continued ...      Go to PAGE 2 >

See Page 2 for more photos of bacterial colonoes, including Mycobacteria and Gram-negative bacteria!
Plate of Staphylococcus epidermiis colonies written as S. epi, and growing on TSY agar
Punctiform, creamy white Staphylococcus bacterial colonies on TSY
Streak plate of S. epidermidis  viewed from bottom

Upper left: Plate of Staphylococcus epidermiis colonies written as S. epi, and growing on TSY agar; Upper right: Streak plate of S. epidermidis 
viewed from bottom;  
Left: Punctiform, creamy white Staphylococcus bacterial colonies on TSY.
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Prokaryotic Cell, Mariana Ruiz
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This page features colonies of epidermal normal flora bacteria and bacterial colony morphology of mainly Gram positive species. 
Gram-negative bacterial colonies growing on MacConkey's agar. A pink colony indicates that the bacteria eat the sugar lactose.
Gram-negative bacterial colonies growing on MacConkey's agar. A pink colony indicates that the bacteria eat the sugar lactose.