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==Description==
Chronic gastritis is often characterised by persistent vomiting of variable frequency and appearance. The underlying cause is unknown but chronic gastritis can be classified according to its histological appearance.
'''Lymphocytic-plasmacytic gastritis''' which may be an immune response to numerous antigens. [[Helicobacter|''Helicobacter felis'']] has been suggested as a cause for such a reaction in dogs and cats.
'''Eosinophilic gastritis''' which may result from an allergic reaction to food antigens.
'''Atrophic gastritis''' which is thought to result from an immune reaction and/or chronic gastric inflammation.
'''Granulomatous gastritis''' which may be caused by ''Ollulanus tricuspis'' in cats.
==Signalment==
==Signalment==
Can affect both dogs and cats.
Can affect both dogs and cats.
==Diagnosis==
==Diagnosis==
===Clinical Signs===
===Clinical Signs===
Include anorexia, vomiting (frequency is very variable from once weekly to several times each day. May also present with haematemesis)and emaciation with longstanding disease. Sometimes dehydration is also present.
===Laboratory Tests===
===Laboratory Tests===
Clinical pathology findings are not diagnostic of chronic gastritis.
Clinical pathology findings are not diagnostic of chronic gastritis.
On Haematology and biochemistry an [[Anaemia|anaemia]] due to chronic blood loss may be present, hypoproteinaemia due to protein loss from the stomach, electrolyte imbalance due to electrolyte loss in the vomitus, peripheral [[Eosinophilia|eosinophilia]] may be present with eosinophilic gastritis.
Assess for signs of renal and hepatic disease as potential systemic causes of persistent chronic vomiting.
===Radiography===
===Radiography===
Plain abdominal radiography is usually unremarkable. Contrast radiography may reveal thickening or irregularity of the gastric rugae.
Plain abdominal radiography is usually unremarkable. Contrast radiography may reveal thickening or irregularity of the gastric rugae.