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Table 1 Comparison of genome sizes among free-living, pathogenic and endosymbiotic bacteria

From: Purification and partial genome characterization of the bacterial endosymbiont Blattabacterium cuenoti from the fat bodies of cockroaches

Bacterial species (host or origin) Genome size (Reference)
Bacteriodetes, class Flavobacteria  
Flavobacterium johnsoniae (free-living) ~6 Mb (Genbank AAPM00000000)
Leeuwenhoekiella blandensis (free-living) 4.24 Mb [36]
Polaribacter irgensii (free-living) 2.74 Mb [36]
F. Psychrophilum (a fish pathogen) 2.86 Mb [37]
Sulcia muelleri (sharpshooters) 245 kb [14]
Blattabacterium cuenoti (cockroaches) 650 kb (this study)
Proteobacteria Endosymbionts  
Baumannia cicadellinicola (sharpshooters) 686 kb [11]
Blochmannia floridanus (carpenter ants) 705 kb [6]
Buchnera spp. (pea arphids) 416–640 kb [4, 10]
Carsonella ruddii (psyllids) 160 kb [9]
Sodalis glossinidius (tsetse flies) 4.17 Mb [33]
Wigglesworthia glossinidia (tsetse flies) 698 kb [5]
Wolbachia spp. (insects and nematodes) 0.95–1.66 Mb [7, 8, 16]
Caryptogena symbiont (deep-sea clams) 1.02 Mb [12]
Riftia magnifica (deep-sea clams) 1.16 Mb [13]
Termite Group I Endosymbiont  
Trichonympha symbiont (termite flagellates) 1.13 Mb [15]