Yale studies diversity of Borrelia

Link: http://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=20971869&retmode=ref&cmd=prlinks

Excerpt:

We genotyped Borrelia burgdorferi detected in larvae of Ixodes
scapularis removed from songbirds and compared them with those
found in host-seeking I.
scapularis nymphs sampled throughout the eastern U.S. Birds are
capable of transmitting most known genotypes, albeit at different
frequencies than expected based on genotypes found among
host-seeking nymphs.