OBJECTIVE Polymorphism analysis of leukocyte antigen DQA1 was carried out on patients with chronic persistent Chlamydia trachomatis genitourinary tract infection,with the purpose to explore the best treatment methods to achieve effective prevention and control.METHODS Randomly selected 50 patients with chronic persistent C.trachomatis genitourinary tract infection receiving treatment from Jun.2011 to Jun.2013,50 common patients with C.trachomatis genitourinary tract infection,and 50 general healthy personne...