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Red

What is a color is the positive reaction for the Indole test?

E.coli

What organism tests positive for Indole?

Red

What color is a positive reaction for the Methyl Red test?

E.coli

What organism tests positive for Methyl Red test?

Gas bubble, orange/red/A+B, no color change after A+B+zinc

What is a positive reaction for a nitrate test?

Blue

What color is the positve reaction for Citrate Test?

Enterobacter

What organism tests positive for Citrate?

Liquid

What is a positive reaction for the Gelatin Test?

Bacillus

What organism tests positive for gelatin?

Clearing around the plate on addition of iodine

What is a positive reaction for the starch test?

Bacillus

What organism tests positive for starch?

More than 1/2 slant black

What's a positve reaction for the bile esculin test?

Enterococcus fecalis

What organism tests positive for bile esculine?

Purple with mineral oil

What is a positive reaction for the amino acid and decarboxylation test?

No mineral oil

What will make the amino acid test invalid?

yellow gas, yellow

What's a positive test for the carbohydrate/lactos and mannitol?

Clearing in agar around colony

What's a positive test for Casein?

Bacillus

What organism tests positive for casein?

Green

What's a positive test for PA (phenylalainine deaminase?)

Proteus

What's an organism that tets positive for PA?

Sexy pink

What's a positive test for urea hydrolysis?

Proteus

What organism tests positive for urea hydrolysis?

Fecal coliforms

What organimss are the MacConkey test looking for?

S. aureus

What organism Mannitol Salt Agar selective and differential for?

Salt content

What makes MSA selective?

Mannitol fermentation

What makes MSA differential?

The dyes in the media

What makes EMB selective?

Iridescent metallic green, black colonories

What makes EMB diffential?

Fecal coliforms, e.coli

What is EMB selective for?

Fecal coliforms

What is MAC looking for

lactose/carbohydrate fermentation

What makes MAC differential?

Crystal dye and bile salts

What makes MAC selective?

30 to 300

What are the only acceptable counts for Standard Plate Count?

Aerobic

For the aerotolerance test, if an organism grows only on top what is it considered?

Facultative

For the aerotolerance test, if an organism grows throughout, what is it considered?

An aerobe

For aerotolerance test, if an organism grows on the bottom what is it considered?

Fecal coliforms to detect water potability

What does the MPN test look for?

Yellow with oil and without oil

What is a fermantative organism look like in the OF test?

Yes

Does lactose broth contain e.coli? Acid + gas

No

Does lactose broth contain e.coli? Acid + no gas

S. aureus

Which organism ferments mannitol?

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