The study by Said and colleagues [7] also showed an increase in the genus Prevotella in the salivary microbiota of patients with IBD, similarly to what occurs in conditions such as esophagitis [51] and active dental caries [52], alteration in some salivary proteins are observed, including an increase in IgA and a decrease in lysozyme levels. The gene discussed is CD79A; the disease is inflammatory bowel disease.