<prompt> Chronic gastiritis is caused by all except -H. PylonPernicious anaemiaAlcoholOveruse of salicylates  <response>: Ans. is d i.e., Overuse of salicylatesOveruse of salicylates NSAIDs cause acute gastritis.Gastritis o Gastritis is the inflammation of Gastric mucosa.o It is a histological diagnosis and can be divided into ?A. Acute gastritisIt is acute mucosal injury, usually transient in injury and is associated with neutrophilic infiltration.Impoant causes areHeavy used of NSAIDs aspirin 4. Ischemia and schockAlcohol and smoking 5. Severe stress Trauma, burn, surgeryUremia 6. Nosogastric intubationB. Chronic gastritisIt is characterized by the presence of chronic mucosal inflammatory changes leading eventually to mucosal atrophy and intestinal metaplasia, usually in the absence of erosions.Impoant causes areH.pylori infection 4. Autoimmune, in association with pernicious anemiaAlcohol and smoking 5. Granulomatous conditions -- Crohn diseaseRadiation 6. Miscellaneous - Amyloidosis, graft - versus - host disease, uremia. 