Characteristics of selected groups of bacteria

Gram Positive Cocci:

	Aerobes:		Anaerobes:	Facultative Anaerobes:
	Micrococcus	Deinococcus	Sarcina	Staphylococcus	Streptococcus	Leuconostoc
Arrangement of Cells:	Clusters	Pairs, tetrads	Pairs, tetrads	Cuboids, pairs	Clusters, pairs, chains	Chains
Catalase:	+	+	-	+	-	-
Fermentation:	-	-	+	+	+	+
Mole % G+C:	64-75	62-70	28-31	30-39	34-46	38-44

A Rough Division of Mycobacteria:

Group:	Pathogenic Species:	Usual Site of Infection:	Some Non-pathogenic Species:
Tuberculosis Complex	M.tuberculosis, M.africanum, M.bovis	Lungs, Lymph nodes	M.microti
Runyan Group I: Photochromogens	M.kansasii, M.marinum	Lungs, Skin	---
Runyan Group II: Scotochromogens	M.scrofulaceum	Lymph nodes	M.gordonae
Runyan Group III: Not Pigmented	M.avium, M.intracellulare, M.xenopi, M.ulcerans	Lungs, Bone, Skin	M.gastri, M.terrae
Runyan Group IV: Rapid Growers	M.fortuitum, M.chelonae	Lungs, Wounds	M.phlei, M.smegmatis
Not Culturable in vitro	M.leprae	Skin, Peripheral Nerves	---

Stylised drawing of the mycobacterial cell wall:

Chlamydial life cycle:

Microbiology
by L.M.Prescott et al.
A balanced, comprehensive introduction to all major areas of microbiology. The sixth edition has been updated extensively to reflect the latest discoveries in the field.
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