(c) In all people with digestive symptoms, the rate of germ with positive CagA was 13.45% (19.42% in Dien Bien; 4.41% in Tra Vinh); 11.54% in Kinh, 22.41% in Thai, 2.86% and in Khmer; the rate of germ with positive VacA was 18.13% (25.24% in Dien Bien, 7.35% in Tra Vinh), 16.67% in Kinh, 25.86% in Thais and 8.57% in Khmer.