RT Journal A1 Hadfield, James A1 Harris, Simon R. A1 Seth-Smith, Helena M.B. A1 Parmar, Surendra A1 Andersson, Patiyan A1 Giffard, Philip M. A1 Schachter, Julius A1 Moncada, Jeanne A1 Ellison, Louise A1 Vaulet, María Lucía Gallo A1 Fermepin, Marcelo Rodríguez A1 Radebe, Frans A1 Mendoza, Suyapa A1 Ouburg, Sander A1 Morré, Servaas A. A1 Sachse, Konrad A1 Puolakkainen, Mirja A1 Korhonen, Suvi J. A1 Sonnex, Chris A1 Wiggins, Rebecca A1 Jalal, Hamid A1 Brunelli, Tamara A1 Casprini, Patrizia A1 Pitt, Rachel A1 Ison, Cathy A1 Savicheva, Alevtina A1 Shipitsyna, Elena A1 Hadad, Ronza A1 Kari, Laszlo A1 Burton, Matthew J. A1 Mabey, David A1 Solomon, Anthony W. A1 Lewis, David A1 Marsh, Peter A1 Unemo, Magnus A1 Clarke, Ian N. A1 Parkhill, Julian A1 Thomson, Nicholas R. T1 Comprehensive global genome dynamics of Chlamydia trachomatis show ancient diversification followed by contemporary mixing and recent lineage expansion JF Genome Research JO Genome Research YR 2017 FD July 01 VO 27 IS 7 SP 1220 OP 1229 DO 10.1101/gr.212647.116 UL http://genome.cshlp.org/content/27/7/1220.abstract AB Chlamydia trachomatis is the world's most prevalent bacterial sexually transmitted infection and leading infectious cause of blindness, yet it is one of the least understood human pathogens, in part due to the difficulties of in vitro culturing and the lack of available tools for genetic manipulation. Genome sequencing has reinvigorated this field, shedding light on the contemporary history of this pathogen. Here, we analyze 563 full genomes, 455 of which are novel, to show that the history of the species comprises two phases, and conclude that the currently circulating lineages are the result of evolution in different genomic ecotypes. Temporal analysis indicates these lineages have recently expanded in the space of thousands of years, rather than the millions of years as previously thought, a finding that dramatically changes our understanding of this pathogen's history. Finally, at a time when almost every pathogen is becoming increasingly resistant to antimicrobials, we show that there is no evidence of circulating genomic resistance in C. trachomatis.