Fig. 1

“Minimum-spanning” phylogenetic tree showing putative relationships among B. henselae sequence types, based on the unweighted pair group method with arithmetic mean. Isolates are represented as circles, whose size reflects their frequency in the data pooled from the present study and the public database PubMLST, and whose color reflects the country of origin. Numbers refer to sequence types. Thick lines indicate minor allelic differences (in only 1 of 8 genes analysed) and therefore closer relatedness. Thin lines indicate sequence variations in 2 or 3 genes. The sequence type ST33, reported in the present study for the first time, is marked in the middle of the tree