Characteristics of 50 Salmonella enterica serotype Typhi
isolates. The dendrogram was generated by using BioNumerics version 6.6
software (Applied Maths, Sint-Martens-Latem, Belgium) and shows results of
cluster analysis on the basis of XbaI–pulsed-field
gel electrophoresis (PFGE) fingerprinting. Similarity analysis was performed
by using the Dice coefficient, and clustering analysis was performed by
using UPGMA. CRISPR1, clustered regularly interspaced short
palindromic repeats 1; MDR, multidrug resistant; AMX,
amoxicillin; STR, streptomycin; SXT, trimethoprim/sulfamethoxazole; CHL,
chloramphenicol; TET, tetracycline; SPT, spectinomycin; SSS,
sulfamethoxazole. Zaire is the former name of the Democratic Republic of the
Congo. Plasmid multilocus sequence typing (pMLST) was performed as described
for incN http://pubmlst.org/plasmid/) or incHI1 (4). Plasmid size was
estimated by using S1 nuclease PFGE (14). For isolates from Africa, red
indicates linage A, blue indicates lineage B, and green indicates lineage
C.