Table 1. Distribution of known SPIs in the salmonellae.
| In silico genome analysis | Microarray data of S. enterica subspecies | ||||||||||||
| SARC electrophoretic groups& | |||||||||||||
| Genomic Island | S. bongori 12419 | S. Typhi CT18 | S. Typhimurium LT2 | S. Enteritidis P125109 | S. Gallinarum 287/91 | S. Cholerasuis SC-B67 | II | IIIa | IIIb | IV | V | VI | VII |
| SPI-1 | + | + | + | + | + | + | + | + | + | + | + | + | + |
| SPI-2 | − | + | + | + | + | + | + | − | + | − | V | + | − |
| SPI-3 | % | + | + | + | + | + | + | V | V | V | + | + | V |
| SPI-4 | + | + | + | + | + | + | + | − | − | + | + | + | + |
| SPI-5 | £ | + | + | + | + | + | NFR | NFR | NFR | NFR | NFR | NFR | NFR |
| SPI-6 | − | + | + | +Ψ | +Ψ | + | V* | V* | V* | V* | − | V* | V* |
| SPI-7 | − | + | − | − | − | − | − | − | − | − | − | − | − |
| SPI-8 | − | + | − | − | − | − | − | − | − | − | − | − | − |
| SPI-9 | + | + | + | + | + | +Ψ | + | + | + | + | + | + | V |
| SPI-10 | − | + | − | +Ψ | +Ψ | − | − | − | − | − | − | − | − |
| SPI-11 | V | V | V | V | V | + | NFR | NFR | NFR | NFR | NFR | NFR | NFR |
| SPI-12 | − | + | + | + | + | + | V | V | V | V | V | V | V |
| SPI-13 | − | − | + | + | + | + | − | + | + | V | − | − | + |
| SPI-14 | − | − | + | + | + | + | − | + | − | + | − | − | + |
| SPI-15 | − | + | − | − | − | − | − | − | − | − | − | − | − |
| SPI-16 | − | + | + | + | + | V | − | − | − | − | − | − | − |
| SPI-17 | − | + | − | + | + | − | − | − | − | − | − | − | − |
| SPI-18 | − | + | − | − | − | − | − | − | + | − | − | − | − |
| SPI-19 | − | − | − | +Ψ | + | − | + | − | − | − | − | − | − |
| SPI-20 | − | − | − | − | − | − | NT | + $ | NT | NT | NT | NT | NT |
| SPI-21 | − | − | − | − | − | − | NT | + $ | NT | NT | NT | NT | NT |
| SPI-22 | + | − | − | − | − | − | − | − | − | − | − | − | − |
+, all genes are conserved; -, entire SPI is missing; V, partially present; Ψ, pseudogenes are contained on SPI;
*saf BCD only; %, SPI-3 present as two independent genomic islands in S. bongori: SPI-3A and SPI-3B (see text for details); £, only half of this island is represented in S. bongori (see text for details); NFR, detected but not fully represented on array; NT, not tested; $, taken from [37];
taken from [20]; SARC electrophoretic groups (EG) relate to the following subspecies: S. enterica subsp. salamae - EG II; S. enterica subsp. arizonae - EG IIIa; S. enterica subsp. diarizonae - EG IIIb; S. enterica subsp. houtenae - EG IV & VII; S. bongori - EG V; S. enterica subsp. indica - EG VI. Microarray data was submitted to ArrayExpress under accession number E-TABM-931.