Animal Diseases, Animal Husbandry Recent Approaches in the Diagnosis of Helicobacter Pylori induced Gastritis by Dr. Mamta Mishra, Dr. Narayani Yadav, Dr. Ishta Agnihotri September 8, 2022 0 If H.pylori is present, the urea is converted to ammonia and bicarbonate, which is picked up as a change in colour. The sensitivity and specificity of this test... Read more.