“…Consistently, many types of bacteria and viruses are thought to be associated with the pathogenesis of IgA vasculitis. The representative causative pathogens are Streptococcus [ 22 , 23 , 24 ], S. aureus [ 25 , 26 , 27 , 28 ], Helicobacter pylori [ 29 , 30 ], varicella-zoster virus [ 31 , 32 ], hepatitis virus [ 33 ], Parvovirus [ 34 , 35 ], human immunodeficiency virus [ 36 ], cytomegalovirus [ 37 ], and Clostridium difficile [ 38 ]. Therefore, these microorganisms are triggers for the development of IgA vasculitis.…”