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Shape images

 

Bacterial colonies and cell shapes
Large images of cells from colonies 1-12 on blood agar plates. All images were taken with phase-contrast optics, at standard x1000 magnification.

Colony 1

Small cocci occurring singly or in small groups.

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Colony 2

Cocci in small chains or clusters.

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Colony 3

Large cocci, forming tetrads.

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Colony 4

Large cocci, forming tetrads.

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Colony 5

Cocci occurring singly or in small clusters.

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Colony 6

Large cocci with three-dimensional planes of cell division, giving regular 'packets' of cells, typical of Staphylococcus.

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Colony 7

Large cocci, forming tetrads.

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Colony 8

Long, thin rods

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Colony 9

Large pleomorphic (variably shaped) rods

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Colony 10

Short rods

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Colony 11

Large cocci with three-dimensional planes of cell division, giving 'packets' of cells, typical of Staphylococcus.

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Colony 12

Mixed population of bacteria enveloped in slime (which accounts for the poor phase-contrast), including Streptococcus (chains of cocci) and two phase-bright spores.

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This site is no longer maintained and has been left for archival purposes

Text and links may be out of date