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File:Escherichia coli on agar.jpg

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Summary

Description
English: Escherichia coli colonies on sheep blood agar after 24 h at 37°C.
  • Fig. A, B: Most strains of E.coli produce smooth, circular, low-convex colonies with entire edge that are about 3-4 mm in diameter. They are greyish, butyrous and readily emulsified.
  • Fig. B, G: Partial digestion of erythrocytes may cause more or less profound discoloration of agar under colonies and in their vicinity (Fig. F). Isolates from urinary tract are quite often beta-hemolytic.
  • Fig. C, H: Less common are higly mucoid strains, typically isolated from urine.
  • Fig. D, I: or small-colony variants, previously known as dwarf colonies, typically isolated from urine.
  • Fig. J: urinary isolate - Rough colonies are quite uncommon in clinical samples
Date
Source Own work
Author HansN.

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Captions

Escherichia coli colonies on sheep blood agar. Growth of E. coli on agar.

Items portrayed in this file

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Escherichia coli

inception

6 October 2019

media type

image/jpeg

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current01:25, 6 October 20192,200 × 1,308 (1.23 MB)New HanseN.User created page with UploadWizard

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