TABLE 3.

Distribution of SRL PAI markers in Strr Ampr Chlr Tetr Shigella isolates

Species (no. of strains)Presence of SRL PAI marker:Linkage of int toa:
intfecorf58serXserW
S. flexneri 3c (1)
S. flexneri 2a (1)+
S. flexneri 3a (1)+++
S. boydii 8 (1)++b
S. boydii 4 (1)+++b
S. flexneri 1b (1)+++b
S. flexneri 2a (1)+++b
S. flexneri 6 (1)+++b
S. boydii 8 (1)+++
S. dysenteriae 3 (2)+++
S. sonnei Form I (1)+++
S. dysenteriae 3 (2)++++
S. flexneri 2a (1)++++
S. flexneri 3b (1)++++
S. flexneri 6 (1)++++
S. sonnei form I (1)++++
S. flexneri 2a (5)+++
S. flexneri 1a (1)++++
S. flexneri 2a (1)++++
S. flexneri 2b (1)++++
S. flexneri 4 (1)++++
S. flexneri 4a (2)++++
S. flexneri 2b (2)+++++
  • a +, PCR linkage was demonstrated; −, PCR linkage was not demonstrated; ⇓serX and ⇓serW, linkage of int to sequences downstream of serX and serW, respectively; —, not tested.

  • b Linkage of int to sequences downstream of serX was negative, but linkage of orf58 to sequences upstream of serX was positive.