Summer 2018:

STEP 4: Identifying Yeast - Agar Plates

Here are the pictures of your samples after they have been allowed to grow on agar plates. Agar plates contain nutrients that allow the organisms to quickly grow into colonies that are large enough to see with the naked eye. Yeasts typically grow into round, creamy white colonies that are somewhat raised.

Click the link to learn more about the science behind this step of the Yeasty Beasties process.

Fresh
And 
Clean
#500

No growth of yeasts :(

Please submit more!

#510

No growth of yeasts :(

Yellow growth is bacteria. The large, fuzzy growth is filamentous fungi.

#511

No growth of yeasts :(

A filamentous fungi has taken over the plate. Please submit more!

#512

Looks like yeasts!

Moving to STEP 5...

#513

No growth of yeasts :(

The slimy, shiny colonies are bacteria and the fuzzy white and blue colonies are fungi.

#514

Growth of filamentous fungi :(

Please submit more!

#515

Round and creamy colonies - Could be yeast! Moving to STEP 5...

#516

Dull, cream colored colonies. Good chance of yeast growth!

Moving to STEP 5...

#520

Colonies are small, but look like yeasts!

Moving to STEP 5...

#521

No growth observed :(

Please submit more!

#522

Round and dense, cream colored colonies. Might be yeasts! Moving to STEP 5...

#523

Very dense, creamy colonies.

Moving to STEP 5...

#526

Growth of a filamentous fungi :(

Please submit more!

#527

No growth observed :(

Please submit more!

#528

Looks like yeasts! Moving to STEP 5...

#529

Dense off-white colonies. Most likely yeasts!

Move to STEP 5...

#530

Colonies are dense with a creamy texture​. Looks like yeast! Moving to STEP 5...

#531

Plate growth from this sample looks like yeasts!

Moving to STEP 5...

#532

Dense, creamy, off-white colonies -

Looks like yeasts!

Moving to STEP 5...

#17

No growth observed :(

Please submit more!

#534

Colonies are dense, round, and an off-white color. Looks like yeasts! Moving to STEP 5...

#536

Not a lot of growth, but these small colonies look like yeasts. Moving to STEP 5...

#537

Creamy-white colonies with mucoid texture. Possibly bacteria, but proceeding to STEP 5...

#538

Smaller colonies are likely bacteria. Large white colonies look like yeasts! Moving both species to STEP 5...

#539

Colonies are smaller, but look like yeasts - 

Moving to STEP 5...

#540

No growth observed :(

Please submit more!

#541

Dense, creamy off-white colonies - 

Moving to STEP 5...

#542

Looks like yeasts! Moving to STEP 5... 

#543

Colonies are small, but meet the yeasts description!

Moving to STEP 5...

#544

Very dense, larger white colonies. 

Moving to STEP 5...

#545

Sample growth looks like yeasts!

Moving to STEP 5...

#546

Colonies are dense and have creamy texture.

Most likely yeast growth!

Moving to STEP 5...

#547

No growth observed :(

Please submit more...

#548

Dense, off-white colonies, Looks like yeasts!

#549

Yep! Looks like yeasts...

Moving to STEP 5...

#550

Growth of the wrong type of fungi :(

Please submit more...

#551

Smaller, tan colored colonies. 

​Still could be yeasts!

Moving to STEP 5...

#552

Beautiful round, chalk textured colonies -

Looks like yeast!

Moving to STEP 5...

#553

Plate growth looks like yeasts! 

Moving to STEP 5...

#554

Round creamy colonies - 

Probably yeasts!

Moving to STEP 5...

#555

Oops! No growth observed :(

Please submit more...

#556

Colonies have yeast characteristics! 

Moving to STEP 5...

#557

Dense, chalk-textured colonies.

Moving to STEP 5...

#558

Sample growth looks like yeasts!

Moving to STEP 5...

The University of Idaho, Moscow.

Department of Biological Sciences

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