Microorganism

Single cell shape

Typical volume

Reference

Gram-negative

M. aeruginosa

Rod-shape: 4 to 5 mm in length and 1 to 1.5 μm diameter (biofilms)

7 mm³

[1]

E. coli

Rod-shape: 2 to 6 μm in length and 1 to 1.5 μm diameter

6 mm³

[4] [12] [14] [15] [16] [17] [20]

P. aeruginosa

Rod-shape: 1 to 5 µm long and 0.5 to 1 µm diameter

1 mm³

[13]

P. fluorescens

Rod-shape: 1 to 5 µm long and 0.5 to 1 µm diameter

1 mm³

[19]

Gram-positive

B. cereus

Rod-shape: 3 to 4 μm in length and 0.25 to 1 μm diameter

2 mm³

[16] [18]

B. subtilis

Rod-shape: 4 to 10 μm in length and 0.25 to 1 μm diameter

3 mm³

[14]

B. subtilis

var niger spore (airborne)

Rod-shape: 4 to 10 μm in length and 0.25 to 1 μm diameter

3 mm³

[19]

S. aureus

Spherical-shape: 0.5 to 1.5 mm in diameter

2 mm³

[13] [27]