Distribution of inactivation events of the fim cluster among S. flexneri Chilean clinical isolates clinical and reference strains.

a Reference strains (ref) are 2457T and Sf301 (serotype 2a), M90T (serotype 5a) and Sf8401 (serotype 5b). Clinical strains (clin) were isolated from patients in Chile during the period 2004–2006.b For clinical isolates, the nonsense mutation at codon 162 of fimB was tested by restriction analysis of PCR fragment 3 using BfaI.c PCR fragment 3 was not amplified from one of the 44 strains tested.Distribution of inactivation events of the fim cluster among S. flexneri Chilean clinical isolates clinical and reference strains.