FIG. 2.

Pulsed-field gel showing the XbaI cleavage patterns of genomic DNA prepared from S. enterica serovar Typhi isolated from the bone marrow of an individual typhoid patient. Similar results were obtained with blood from the same patient at several time points during the infection. Lanes 1 to 16, PFGE patterns for 16 different S. enterica serovar Typhi isolates, respectively; arrow, difference in DNA fragment band pattern (lane 16); lanes M, bacteriophage lambda concatamer molecular size marker, with the sizes of the DNA fragments (in kilobase pairs) indicated to the left of the figure.