pH and microflara in the gastric juice of 50 gastric cancer patients were analyzed between the years 1988 and 1990.32 patients were male and 18 were female, the age of whom ranged between 42 and 80,with a median of 61 years. The average gastric pH was 5.0 (2.0-8.0). Microbiological cultures revealed no bacteria growth in 5 cases (% 10), bacteriae colonization in 26 cases (% 52), bacteriae and Candida albicans in 9 cases (%18), and only Candida albicans colonization in 10 cases (% 20).