Distribution of inactivation events of the <i>fim</i> cluster among <i>S</i>. <i>flexneri</i> 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.