Table 1 A shortened list of Part of PAI loci mentioned in the text. (see supplementary Table 2S for the complete list of 207 collected PAI loci.) [see Additional file 2]

PAI I₅₃₆

Hemolysin, fimbriae

Escherichia coli 536

AJ488511(77.0)^b

PAI II₅₃₆

Hemolysin, P fimbriae

E. coli 536

AJ494981(102.3)^b

PAI III₅₃₆

S fimbriae

E. coli 536

X16664(75.8)^b

PAI I_CFT073

Hemolysin, P fimbriae

E. coli CFT073

AF081283(10.2), AF081284, AF081285(13.7), AF081286, AF003741-2

PAI II_CFT073

P-fimbriae

E. coli CFT073

AF447814(71.7)^b

LEE

Attaching and effacing, TTSS, invasion

E. coli O157:H7 EDL933; E2348/69; 4797/97; 83/39; RDEC-1

AF071034(45.3)^b, AF022236(35.6)^b, AJ278144(37.7)^b, AF453441(60.4)^b, AF200363(37.9)^b

SPI-1

TTSS, invasion into epithelial cells, apoptosis

Salmonella typhimurium SL1344

AF148689, U16278, U16303

SPI-2

TTSS, invasion into monocytes

S. typhimurium SL1344; LT2; RF333

AF020808, AJ224978(12.1), Z95891, X99944-5, AJ224892, U51927, Y09357

SPI-3

Invasion, survival in monocytes

S. typhimurium 14028s; S. enterica subsp. enterica serovar Rachaburi & serovar Dublin

AF106566(17.0)^b, Y13864, M57715, AJ000509, AY144489, AY144490(10.1)

SHI-2

Iron uptake

S. flexneri M90T & SA100

AF141323(23.8)^b, AF097520(14.3)

SRL

Iron uptake

S. flexneri 2a YSH6000

AF326777(66.7)

Yen HPI

Iron uptake

Yersinia enterocolitica Ye 8081 & WA314

X94452, X95298, AJ132668, AJ132945(14.0), Y12527(13.6)

Yps HPI

Iron uptake

Y. pseudotuberculosis PB1 & IP32637; Y. pestis KIM10+

AJ236887, AJ009592, AJ009988

VPI

Toxin-coregulated pilus (Tcp) adhesin, regulator

Vibrio cholerae 395; N16961; others

AF325733(41.3)^b, AF325734(41.3)^b, AF034434(12.9), X64098(13.8), U39068(15.0), AF208385, AF319954, AF306795-8, AF319652-5, AF378526, AF452570-80

cag PAI

Type IV secretion, cytotoxing-associated gene (cag) antigen

Helicobacter pylori

AF282853(20.2)^b, AF282852(21.3)^b, U60177, AY136637-46

Hrp PAI

TTSS, effectors

Pseudomonas syringae DC3000 & others

AF232004(52.5)^b, AF232005(11.0), U25812-3, AF232003, AF069650-2, L41862, U03854-5, U07346, AF051694, L11582, AY147017-28

PAGI-1

Pseudomonas aeruginosa X24509 & PA14

AF241171(51.3)^b, AY273869(111.3)^b

TTSS locus

TTSS

P. luminescens W14

AY144116(47.7)^b