Changes

Microscopic pathology includes lesions in the ileum and cecum and serosal haemorrhage. The ileum is often also thickened. Intestinal segments will have mild to moderate segmental hyperplasia of the mucosa. Intestinal crypts will appear elongated with marked proliferation of enterocytes and often goblet cells. Lymphoid hyperplasia may be seen together with leukocytes near the base of the villi. Diagnosis is primarily made via histolology.

Microscopic pathology includes lesions in the ileum and cecum and serosal haemorrhage. The ileum is often also thickened. Intestinal segments will have mild to moderate segmental hyperplasia of the mucosa. Intestinal crypts will appear elongated with marked proliferation of enterocytes and often goblet cells. Lymphoid hyperplasia may be seen together with leukocytes near the base of the villi. Diagnosis is primarily made via histolology.

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'''Salmonella'''

'''Salmonellosis'''

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''Salmonella typhimurium'' and ''Salmonella enteriditis'' are the common causative agents and are often associated with contaminated food and bedding. Diarrhoea may be haemorrhagic, cause septicaemia and can also cause sudden death.  

The incidence of salmonellosis is low. ''Salmonella enterica'' is the common causative agent and is associated with contaminated food and bedding. Diarrhoea may be haemorrhagic, cause septicaemia and can also cause sudden death. Clinical signs are primarily seen in pregnant females or infants.

Macroscopic pathology includes fluid filled small intestine and cecum. The lungs may have a patchy haemorrhagic appearence. Small white foci are visible in the liver. The most significant macroscopic pathology is a septic lesion partialy occluding thrombosis of pulmonary venules. Multifocal necrosis of the liver, lymph nodes and spleen may also be visible.

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