Specificity test of serogroup-specific PCR assay The primers for the serogroup-specific PCR are listed

in Table 1. PCR amplification was performed with 20 μl volumes containing 10× PCR buffer, 1.5 mM MgCl2, 100 mM deoxynucleoside triphosphates, 0.1 μM of each primer, 2.5 U Taq DNA polymerase (Takara), 50 ng template DNA and PCR-grade water. Thermal PCR conditions were as follow: initial denaturation, 95°C for 2 min; 30 cycles of 30 s at 95°C (denaturation), 30 s (annealing) at temperatures varying according to the Tm of the primer pair (annealing temperatures are listed in Table 1) and 1 min at 72°C (extension); final find more extension was at 72°C for 2 min. Amplification products were analyzed by electrophoresis through a 1% (wt/vol) agarose gel at 100 v for 30 min in 0.5× TBE. The specificity of each PCR was assessed using 75 selleck screening library reference strains, 40 isolates and the non-leptospira strains of S. enteritidis H9812

and S. aureus N315. Nucleotide sequence accession numbers Nucleotide sequences are available under the following accession numbers: O-antigen gene clusters of strains Gui44, Lin4, Lin6 and C401 are FJ976886, FJ976887, FJ976888 and FJ976889, respectively. Acknowledgements FG-4592 mouse This work was supported in part by the National Natural Science Foundation of China (grant numbers 30770111, 30670102, 30770820, 30970125, 30900051), the National Key Program for Infectious Diseases of China (grant numbers 2008ZX10004-002, 2008ZX10004-009, 2009ZX10004-712), the National High Technology Research and Development Program of China, and the Program of Shanghai Subject Chief Scientist (grant number 09XD1402700). We thank Bao-Yu Hu (Department of Medical Microbiology and Parasitology,

Shanghai Jiao Tong University School of Medicine), Yi-Xin Nie (National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention) and Ying-Chao Yang (Department of Strains, National Institute Miconazole for the Control of Pharmaceutical and Biological Products) for help in bacterial culture preparation. We are thankful to Hong-Liang Yang for thoughtful comments on the manuscript. Electronic supplementary material Additional file 1: Table S1: Results of reference strains discriminated with O-genotyping. Details about 75 reference strains and O-genotyping results are included in this table. (DOC 166 KB) Additional file 2: Table S2: Results of clinical strains discriminated with O-genotyping. Details about 40 clinical strains and O-genotyping results are included in this table. (DOC 102 KB) Additional file 3: Tables S3-S6. Table S3: Putative genes in the L. interrogans serogroup Canicola serovar Canicola str.gui44 O-antigne gene clusterDetails about putative genes in the L. interrogans serogroup Canicola serovar Canicola str.gui44 O-antigne gene cluster are included in this table. Table S4: Putative genes in the L. interrogans serogroup Autumnalis serovar Autumnalis str.