Distribution of each major SNP Group by state.

Number of isolates corresponding to a specific group within a state is indicated in parenthesis (). It is possible that the total number of isolates per state does not equal the sum of the isolates per group because not all isolates fell within a group, some were outliers in the phylogeny (i.e. 09-0234FM_JAL_Cattle).某一州内对应特定类群的分离株（isolates）数量以括号（()）标注。需注意，单州分离株总数量未必等于该州各类群分离株数量之和，原因在于并非所有分离株均可归入某一类群，部分分离株属于系统发育（phylogeny）分析中的离群株（例如09-0234FM_JAL_Cattle）。