Includes research on the bacteria that cause 92% of all classical intestinal infections, namely: Proteus, Klebsiella pneumoniae, Klebsiella aerogenes, Pseudomonas, Salmonella, Shigella, Campylobacter jejuni, Listeria, Yersinia enterocolitica, Helicobacter pylori, Clostridium perfringens and Clostridioides difficile.