Figure 1From: Genetic diversity and multiple introductions of porcine reproductive and respiratory syndrome viruses in ThailandLineage identification of multiple introductions of Thai PRRSVs. The phylogenetic trees were constructed in MrBayes and were mid-point rooted. For clarity, only the bootstrap values of selected and well-supported nodes were shown. (A) Thai Type 1 PRRSVs and (B) Thai Type 2 PRRSV on global context show multiple introductions. Blue arrows and colored rectangles show different lineages of Thai PRRSVs.Back to article page