Figure 5. Dendrogram (UPGMA method, circular representation) based on the results of DNA microarrays study (172 genes only) of the 105 MSSA CC398 strains and the 53 MRSA CC398 isolated in France.

For each of the 172 genes, the average of the results of all the strains corresponding to the same spa type was calculated. Each group of strains is represented by the corresponding spa type. spa types corresponding to MRSA strains are colored in red.