Table 3.

Distribution of SPIs in four representative genomes of Salmonella stains^∗.

Genomic Island	S. Typhimurium WW012	S. Typhimurium LT2	S. Typhi CT18	S. Indiana C629
SPI-1	+	+	+	+
SPI-2	+	+	+	+
SPI-3	+	+	+	-
SPI-4	+	+	+	+
SPI-5	+	+	+	+
SPI-6	-	-	+	-
SPI-7	-	-	+	-
SPI-8	-	-	+	-
SPI-9	-	-	+	-
SPI-10	-	-	+	-
SPI-12	-	-	+	-
SPI-13	+	+	-	-
SPI-14	+	+	-	-
C63PI	+	+	-	+

^∗Not identified.