 by the Kruskal-Wallis test, followed by the Student-Newman-Keuls (SNK) test using software SAS 0.0 (SAS Institute).](pone.0000000.g000){#pone-0000000-g000}  00.0000/journal.pone.0000000.t000  ###### Serological specificity of the major seroreactive surface-exposed proteins of *R. heilongjiangensis* analyzed by 