Quick Review Cards for Medical Laboratory Science

Comparison of Microorganisms Clinical Microbiology Review 286

BACTERIA CHLAMYDIA MYCOPLASMA RICKETTSIAE VIRUSES

Size

DNA & RNA?

Ribosomes?

Reproduce by binary fission?

Cell wall?

Growth on nonliving medium?

Obligate intracellular parasite?

Gram stain?

Susceptible to antibiotics?

0.4–2 μm

Both

Yes

Yes

Yes

Yes

Most are not

Yes

Yes

0.3–0.5 μm

Both

Yes

Yes

Yes

No

Yes

No

Yes

300 nm

Both

Yes

Yes

No

Yes

No

No

Yes

0.3–0.5 μm

Both

Yes

Yes

Yes

No

Yes

No

Yes

25–300 nm

Either

No

No

No

No

Yes

No

No