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Urease Test Send Print

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Created: Thursday, 11 November 2010
Last update: Thursday, 11 November 2010
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Urease Test Using Urea Agar Slants

Urease test using urea agar slants. A rapidly positive urease test by Proteus mirabilis (b) is indicated by a color change to bright pink (fuchsia) throughout the urea agar slant as compared to the uninoculated control (a). A delayed positive reaction by Klebsiella pneumoniae is indicated by a color change only along the slant (c).  A negative reaction by Escherichia coli is indicated by the yellow coloration of the media (d). All samples were incubated at 37oC for 16 hours. (Benita A. Brink, Adams State College, Alamosa, CO)

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Urease Test Using Urea Agar Slants - Labeled

Urease test using urea agar slants. A rapidly positive urease test by Proteus mirabilis (b) is indicated by a color change to bright pink (fuchsia) throughout the urea agar slant as compared to the uninoculated control (a). A delayed positive reaction by Klebsiella pneumoniae is indicated by a color change only along the slant (c).  A negative reaction by Escherichia coli is indicated by the yellow coloration of the media (d). All samples were incubated at 37oC for 16 hours. (Benita A. Brink, Adams State College, Alamosa, CO)

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Urease Test Using Urea Broth

Urease test using urea broth. A positive urease test by Proteus vulgaris (left) is indicated by a color change to bright pink (fuchsia).  A negative reaction by Escherichia coli (right) is indicated by the yellow coloration of the media. All samples were incubated at 37oC for 16 hours. (Anne Hanson, University of Maine, Orono, ME)

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Positive Urease Test Using Urea Broth

A positive urease test using urea broth. A positive urease test is indicated by a color change to bright pink (fuchsia). (Diane Hartman, Baylor University, Waco, TX)

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Negative Urease Test Using Urea Broth

A negative urease test using urea broth. A negative urease test is indicated by the yellow coloration of the media. (Diane Hartman, Baylor University, Waco, TX)

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Urease Test Using Urea Broth

Urease test using urea broth. A positive urease test by Proteus (right) is indicated by a color change to bright pink (fuchsia). An uninoculated control shows the yellow-orange color of the uninoculated media. (Clarissa L. Kaup, Bellevue University, Bellevue, NE; J. L. Henriksen, Bellevue University, Bellevue, NE)

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Urease Test Using Urea Agar Slants

Urease test using urea agar slants. A positive urease test by Proteus vulgaris (left) is indicated by a color change to bright pink (fuchsia) throughout the urea agar slant.  A negative reaction by Escherichia coli (right) is indicated by the yellow coloration of the media. All samples were incubated at 37oC for 16 hours. (Tasha L Sturm, Cabrillo College, Aptos, CA)

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