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*[[Salmonellosis|Septicaemic salmonellosis]] affects the Peyer's patches
*[[Salmonellosis|Septicaemic salmonellosis]] affects the Peyer's patches
*[[Bovine Viral Diarrhoea Virus|Bovine Viral Diarrhoea disease]] causes ulcers to form over the patches
*[[Bovine Viral Diarrhoea Virus|Bovine Viral Diarrhoea disease]] causes ulcers to form over the patches
−
*Infected by mycobacteria in [[Intestines Proliferative Enteritis - Pathology#Paratuberculosis (Johnes disease)|Johnes disease]]
+
*Infected by mycobacteria in [[Johne's Disease|Johnes disease]]
*[[Yersinia]] enter the intestinal mucosa via M cells
*[[Yersinia]] enter the intestinal mucosa via M cells