Document Detail

Two boundaries separate Borrelia burgdorferi populations in North America.
MedLine Citation:
PMID:  22729536     Owner:  NLM     Status:  MEDLINE    
Understanding the spread of infectious diseases is crucial for implementing effective control measures. For this, it is important to obtain information on the contemporary population structure of a disease agent and to infer the evolutionary processes that may have shaped it. Here, we investigate on a continental scale the population structure of Borrelia burgdorferi, the causative agent of Lyme borreliosis (LB), a tick-borne disease, in North America. We test the hypothesis that the observed population structure is congruent with recent population expansions and that these were preceded by bottlenecks mostly likely caused by the near extirpation in the 1900s of hosts required for sustaining tick populations. Multilocus sequence typing and complementary population analytical tools were used to evaluate B. burgdorferi samples collected in the Northeastern, Upper Midwestern, and Far-Western United States and Canada. The spatial distribution of sequence types (STs) and inferred population boundaries suggest that the current populations are geographically separated. One major population boundary separated western B. burgdorferi populations transmitted by Ixodes pacificus in California from Eastern populations transmitted by I. scapularis; the other divided Midwestern and Northeastern populations. However, populations from all three regions were genetically closely related. Together, our findings suggest that although the contemporary populations of North American B. burgdorferi now comprise three geographically separated subpopulations with no or limited gene flow among them, they arose from a common ancestral population. A comparative analysis of the B. burgdorferi outer surface protein C (ospC) gene revealed novel linkages and provides additional insights into the genetic characteristics of strains.
Gabriele Margos; Jean I Tsao; Santiago Castillo-Ramírez; Yvette A Girard; Sarah A Hamer; Anne Gatewood Hoen; Robert S Lane; Steve L Raper; Nicholas H Ogden
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Publication Detail:
Type:  Journal Article     Date:  2012-06-22
Journal Detail:
Title:  Applied and environmental microbiology     Volume:  78     ISSN:  1098-5336     ISO Abbreviation:  Appl. Environ. Microbiol.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-08-10     Completed Date:  2012-12-11     Revised Date:  2013-07-12    
Medline Journal Info:
Nlm Unique ID:  7605801     Medline TA:  Appl Environ Microbiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6059-67     Citation Subset:  IM    
Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, United Kingdom.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/JQ951094;  JQ951095;  JQ951096;  JQ951097;  JQ951098;  JQ951099;  JQ951100;  JQ951101;  JQ951102;  JQ951103;  JQ951104;  JQ951105;  JQ951106;  JQ951107;  JQ951108;  JQ951109;  JQ951110;  JQ951111;  JQ951112;  JQ951113;  JQ951114;  JQ951115;  JQ951116;  JQ951117;  JQ951118;  JQ951119;  JQ951120;  JQ951121;  JQ951122;  JQ951123;  JQ951124;  JQ951125;  JQ951126;  JQ951127;  JQ951128;  JQ951129;  JQ951130;  JQ951131;  JQ951132;  JQ951133;  JQ951134;  JQ951135;  JQ951136;  JQ951137;  JQ951138;  JQ951139;  JQ951140;  JQ951141;  JQ951142;  JQ951143;  JQ951144;  JQ951145;  JQ951146;  JQ951147;  JQ951148;  JQ951149;  JQ951150;  JQ951151;  JQ951152;  JQ951153;  JQ951154;  JQ951155;  JQ951156;  JQ951157;  JQ951158;  JQ951159;  JQ951160;  JQ951161;  JQ951162;  JQ951163;  JQ951164;  JQ951165;  JQ951166;  JQ951167;  JQ951168;  JQ951169;  JQ951170;  JQ951171;  JQ951172;  JQ951173;  JQ951174;  JQ951175;  JQ951176;  JQ951177;  JQ951178;  JQ951179;  JQ951180;  JQ951181;  JQ951182;  JQ951183;  JQ951184;  JQ951185;  JQ951186;  JQ951187;  JQ951188;  JQ951189;  JQ951190;  JQ951191;  JQ951192;  JQ951193;  JQ951194;  JQ951195;  JQ951196;  JQ951197;  JQ951198;  JQ951199;  JQ951200;  JQ951201;  JQ951202;  JQ951203;  JQ951204;  JQ951205;  JQ951206;  JQ951207;  JQ951208;  JQ951209;  JQ951210;  JQ951211;  JQ951212;  JQ951213;  JQ951214;  JQ951215;  JQ951216;  JQ951217;  JQ951218;  JQ951219;  JQ951220;  JQ951221;  JQ951222;  JQ951223;  JQ951224;  JQ951225
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MeSH Terms
Borrelia burgdorferi / classification*,  genetics*,  isolation & purification
Canada / epidemiology
Evolution, Molecular
Genetic Variation*
Ixodes / microbiology
Lyme Disease / epidemiology*,  microbiology*
Molecular Epidemiology
Molecular Sequence Data
Multilocus Sequence Typing
United States / epidemiology

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