Taxa over-represented in Borrelia-positive ticks as identified by indicator-species analysis with 15,999 simulations, arranged by probability of null association.

Indicator values (IV) represent the combined relative abundance of a given taxon in a group (Borrelia positive/negative) and the proportion of samples within that group that had that taxon; an IV of 100 indicates perfect association of a taxon with a group due to exclusive occurrence and high relative abundance. Significance is determined by comparison of observed IVs with IVs generated from randomizations. No taxa were identified as being under-represented in Borrelia-positive ticks. Results were qualitatively similar whether or not Rickettsia sequences were included in the dataset. Asterisks indicate statistical significance at P = 0.0001 with the two taxa associated with P ≤ 0.0005 listed as marginally-significant indicator taxa.