Figures from the book: Microbial Population Genetics
Population Genetics of Human Pathogenic Bacteria: Implications for Source Tracking and Rapid Identification Ruifu Yang, Yujun Cui, Yanjun Li and Yanfeng Yan
Figure 4. Hypothetic transmission route of Y. pestis. Black line shows the main transmission route of Y. pestis bv. microtus, red line bv. mediaevalis, pink line bv. orientalis, and green line Ca37. Black dot line shows the potential relationship between Ca37 and Ca37'. Various symbols represent different biovars (see legend of Figure 2 for detail, one more symbol, diamond, is used to represent subsp. caucasica in this figure). The spacers array information of isolates from South America and Africa comes from previous research [18]. Red circles represent isolates from Africa, with spacers array "a-1-2-3-4-10/11" in YPa (data from Pourcel et. al, 2005). All the known African isolates contain "a10" spacer. Therefore, a10 is possibly a characteristic spacer of isolates from Africa. Nevertheless, we do not consider these isolates as one cluster due to the limited data available from African strains.
