Yersinia enterocolitica Antibody, IgA by Immunoblot Yersinia enterocolitica Antibody, IgG by Immunoblot Yersinia enterocolitica Antibody, IgM by Immunoblot Y Chromosome Microdeletion Yersinia enterocolitica Antibodies, IgA and IgG by Immunoblot Yersinia enterocolitica Antibodies, IgA, IgG, and IgM by Immunoblot