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e coli proteus mirabilis

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โˆ™ 12y ago
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โˆ™ 8mo ago

Indole positive gram negative rod-shaped bacteria include members of the Enterobacteriaceae family such as Escherichia coli and Klebsiella pneumoniae. These bacteria produce indole from the amino acid tryptophan as a metabolic byproduct, which can be detected using the Kovac's reagent test. Indole production is a characteristic used in the identification and differentiation of these bacteria in the laboratory.

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Q: Indole positive gram negative bacteria rods?
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Related questions

Is staphylococcus epidermidis indole positive?

No, Staphylococcus epidermidis is usually indole negative, meaning it does not produce indole as a byproduct of tryptophan metabolism. This can help differentiate it from other bacteria that are indole positive.


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What is the structural difference in the cell walls of gram-negative bacteria that distinguishes them from gram-positive bacteria?

Gram-negative bacteria have a thinner peptidoglycan layer in their cell walls compared to gram-positive bacteria. Additionally, gram-negative bacteria have an outer membrane that contains lipopolysaccharides, which is absent in gram-positive bacteria.


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Not necessarily. Gram positive and gram negative bacteria can vary in size depending on the species. Both gram positive and gram negative bacteria can range in size from small cocci to long rod-shaped cells.


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