Streptococcus infantarius and carcinogenesis: a new chapter in colorectal pathology.

As mirrored by several topics throughout history, the causal link between infectious diseases and cancer was initially viewed with disbelief and subsequently forgotten, only to be rediscovered decades later, when it started flourishing into a vibrant multidisciplinary field . Just a few years ago, it was estimated that over 20% of all cancers are causally linked to infectious diseases, most frequently caused by bacteria, viruses, and parasites .