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Figure. Unrooted maximum-likelihood phylogram for partial 16S
rRNA gene sequences of selected Borrelia species, including a novel
Borrelia organism, and representing Lyme borreliosis and relapsing
fever groups. Sequence alignment corresponded to positions 1138 to 1924
of B. burgdorferi rRNA gene cluster (GenBank accession no. U03396).
Maximum likelihood settings for version 4.10b of PAUP* (http://paup.csit.fsu.edu)
for equally weighted characters corresponded to Hasegawa-Kishino-Yano
model with an empirical estimate of transition/transversion ratio = 7.
Support for clades was evaluated by 25 bootstrap replications by using
branch-and-bound search, and values >50% are indicated along branches.
Sequences (with GenBank accession nos.) used in the analysis were the
following: B. andersoni (L46688), B. miyamotoi (D45192),
B. lonestari (U23211), B. hermsii (U42292), B. turicatae
(U42299), B. duttonii (U28503), B. anserina (U42284), and
new Borrelia species (AY536513).
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