Difference between E.Coli and Klebsiella

E.Coli

It is a rod-shaped, gram-negative bacterium that is facultatively anaerobic. It is a harmless organism that is part of the gut microbiota. Also, it is released into the environment along with faecal matter. It is a chemoheterotroph.

E.Coli serves as a model organism for scientific studies. It is also used as a major tool in recombinant DNA technology.

Klebsiella

Klebsiella is a rod-shaped, gram-negative bacteria. They are found developing in various environments and also in humans. In humans, they are found in the mouth, nose and intestine. They belong to the family Enterobacteriaceae but are thicker and shorter than their counterparts. Most Klebsiella are aerobic, while some are facultatively anaerobic.

Difference between E.Coli and Klebsiella

E.Coli

Klebsiella

E.Coli is a species of rod-shaped, gram-negative bacterium in the family Enterobacteriaceae.

Klebsiella is a genus that includes a lot of rod-shaped, gram-negative species of bacteria. They also belong to Enterobacteriaceae.

It is 2 µm long and has 0.25 to 1 µm diameter.

It is 0.5-5 µm long and 0.3-1.5 µm wide.

It is normally seen in the human gut microbiota. Also seen in water contaminated with faecal matter.

In humans, it is found in the mouth, nose and intestine. Also seen in plants, animals, soil and water.

It is facultatively anaerobic.

Most of them are aerobes, and a few are also facultative anaerobes.

E.Coli produces a positive result in the Indole test.

Klebsiella produces a negative result in the Indole test.

It shows a positive result for the methyl red test.

It shows a negative result for the methyl red test.

It shows negative results for Voges Proskauer as well as the citrate test.

It shows positive results for Voges Proskauer as well as the citrate test.

Frequently Asked Questions

Is E.Coli an indicator organism?

E.Coli is commonly found in the human gut microbiota. Also, it is released into the environment along with faecal matter. The presence of E.Coli in a sample indicates that it is contaminated with faecal matter. Thus, it is considered as an indicator organism.

What is the IMViC test?

IMViC is a group of tests conducted to identify coliform species. IMVic stands for Indole, Methyl-red test, Voges Proskauer, Citrate test. These tests are conducted individually and are mostly used to differentiate the members of the Enterobacteriaceae family.

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