IL17A and chronic gingivitis: IL17 positive cells were detected in duodenal and mesenteric lymph node tissues from dogs with inflammatory bowel disease (Fig 2A and 2B, n = 5), chronic dermatoses (Fig 2C, n = 1), chronic gingivitis (Fig 2D, n = 5), necrotizing meningoencephalitis (Fig 2E, n = 1), and chronic lymphoplasmacytic and neutrophilic rhinitis (Fig 2F, n = 3).