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Journal of Clinical Microbiology, Mar 1996, 652-656, Vol 34, No. 3
DS Guttman, PW Wang, IN Wang, EM Bosler, BJ Luft and DE Dykhuizen
The genetic heterogeneity of the spirochete Borrelia burgdorferi within
single adult black-legged ticks from Shelter Island, N.Y., was determined
by cold, single-strand conformation polymorphism (SSCP) analysis. The
central region of the ospA gene of B. burgdorferi from infected ticks was
amplified by nested PCR. Amplified product of the correct size was obtained
from 20 to 45 ticks (44%). This is the fraction of ticks that is expected
to be infected with B. burgdorferi. Four variant classes were determined by
SSCP analysis. Eight ticks were infected with a single variant, nine ticks
were infected with two variants, two ticks were infected with three
variants, and one tick was infected with all four variants. DNA from each
variant was sequenced. Five different sequences were found. The sequence of
each variant was different from that of another variant by a single base.
SSCP analysis could distinguish three of the four single-base changes found
in the region.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Multiple infections of Ixodes scapularis ticks by Borrelia burgdorferi as revealed by single-strand conformation polymorphism analysis
Department of Ecology and Evolution, State University of New York at Stony Brook, USA.
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