Table 3.

Ratio core/pangenome of several bacterial species according to their life style

Species	Genome used	Lifestyle	Intracellular	Niche	%a
Prochlorococcus marinus	12	Sympatric	no	Marine environment	5
Clostridium botulinum	14	Sympatric	no	Soil	11
Rhodopseudomonas palustris	7	Sympatric	no	Soil, marine environment	46
Sinorhizobium meliloti	6	Sympatric	no	Soil	49
Salmonella enterica	20	Sympatric	facultative	Animals	62
Acinetobacter baumannii	11	Sympatric	no	?	65
Legionella pneumophila	11	Sympatric	facultative	Amoeba	69
Escherichia coli	19	Sympatric	no	Animals	70
Bacillus cereus	12	Sympatric	no	Soil	74
Campylobacter jejuni	14	Sympatric	facultative	Human, chicken	76
Clostridium difficile	18	Sympatric	no	Human gut	77
Helicobacter pylori	10	Sympatric	facultative	Human	78
Haemophilus influenzae	9	Sympatric	facultative	Human	80
Streptococcus pneumoniae	10	Sympatric	no	Human	82
Pseudomonas aeruginosa	7	Sympatric	no	Water	84
Streptococcus agalactiae	5	Sympatric	no	Human	84
Listeria monocytogenes	20	Sympatric	facultative	Amoeba?	84
Francisella tularensis	13	Sympatric	facultative	Ticks	87
Yersinia pestis	12	Allopatric	facultative	Rodents	89
Coxiella burnetii	7	Allopatric	yes	Animals	90
Tropheryma whipplei	19	Allopatric	yes	Human	94
Mycobacterium tuberculosis	20	Allopatric	yes	Human	96
Buchnera aphidicola	8	Allopatric	yes	Aphid	98
Bacillus anthracis	9	Allopatric	no	Animals	99
Rickettsia rickettsii	8	Allopatric	yes	Ticks	99
Chlamydia trachomatis	20	Allopatric	yes	Human	99
Rickettsia prowazekii	8	Allopatric	yes	Human	100

^a% is the ratio core/pangenome.