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Micro World

How small is Campylobacter jejuni?

Campylobacter jejuni is about 2 µm long.

What is measured: spiral bacterium, cell length

Campylobacter jejuni (2 µm) drawn to scale beside an E. coli bacterium (2 µm) and a red blood cell (7.5 µm)
Drawn to scale, from left to right: Campylobacter jejuni (2 µm), E. coli bacterium (2 µm) and Red blood cell (7.5 µm).

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How big is that, really?

  • About the same length as an E. coli bacterium
  • About 3 would fit across a red blood cell
  • About 20× the width of a flu virus
  • About 80× the width of a ribosome

Learn

Facts about Campylobacter jejuni

Campylobacter jejuni is one of the most common causes of bacterial foodborne illness worldwide.

Source: CDC, Campylobacter; ASM Microbe Library

Micro World

NameSizeCompared with Campylobacter jejuni
Pandoravirus1 µm0.5×
Nitrosomonas europaea Bacterium1.5 µm0.75×
Micrococcus luteus1.5 µm0.75×
Listeria monocytogenes2 µmsame size
Campylobacter jejuni2 µmthis page
Klebsiella pneumoniae2 µmsame size
Deinococcus radiodurans2 µmsame size
Shigella flexneri2.5 µm1.3×
Penicillium Spore3 µm1.5×
Aspergillus niger Spore4 µm2×

Test your sense of scale

Which is bigger: Campylobacter jejuni or Shigella flexneri?

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