Volume 10, Number 9—September 2004
Research
Genotyping, Orientalis-like Yersinia pestis, and Plague Pandemics
Figure 1

Figure 1. Unrooted tree showing the phylogenetic relationships among the 35 studied Yersinia pestis isolates inferred from sequence analysis of the combination of the eight intergenic spacers using the unweighted pair group method with arithmetic mean methodO, Ypestis Orientalis biovar; M, Ypestis Medievalis biovar; A, Ypestis Antiqua biovarNumbers refer to the isolate number as in Table 1.