The study was aimed à studying role of modern methods for diseases detection for their application at a treatment choices step. During research the comparative analysis is given to several methods of helicobacteriosis identification. Examination of 200 middle-aged persons from 40 to 59 years (men – 132 people, women – 68 people, middle age of 46,2+3,3 years) and 180 patients of elderly patients from 60 to 74 years (men – 116 people, women – 64 people, middle age of 65,8+2,8 years) having the chronic gastritis verified morphologically was conducted. Thus it is shown that various identification methods give different percent values of contamination in chronic gastritis. It is revealed that the frequency of a helicobacteriosis according to PCR and urease test was identical in the middle age and at elderly patients (ð>0,05), however when using a histologic method indicators of patients of middle age were less, than according to PCR (45% and 62%, ð<0,05), and at elderly it is less, than Helpil test – (49% and 80%, ð <0,05). The obtained data show need of exact aetiological diagnosis of somatic pathology for geriatric practice which will provide a target and consequently also efficiency of the appointed medical therapy.