Diversity of Helicobacter pylori isolates in expression of antigens and induction of antibodies

Table 3 Correlation between positive H pylori infection rates and virulent factor expression in different gastric diseases

Disease	Patient	Positive number/rate of bacteria, n/%	Positive number/rate of virulence factor, n/%
			UreB	VacA	CagA	NapA
Chronic gastritis	240	102/42.5	102/100	47/46.1a	93/91.2	94/92.2
Surface gastritis	93	38/40.9	38/100	13/34.2	34/89.5	36/94.7d
Active gastritis	120	52/43.3	52/100	30/59.6c	48/92.3	50/96.2d
Atrophic gastritis	27	12/44.4	12/100	4/33.3	11/91.7	8/66.7
Peptic ulcer	92	43/46.7	43/100	29/67.4	40/93.0	41/95.4
Stomach	35	16/45.7	16/100	11/68.9	15/93.8	15/93.8
Duodenum	39	18/46.2	18/100	11/61.1	16/88.9	17/94.4
Complexity	18	9/50.0	9/100	7/77.8	9/100	9/100
Gastric adenocarcinoma	15	6/40.0	6/100	3/50.0	6/100	6/100

^aP < 0.05 vs peptic ulcer,

^cP < 0.05 vs active gastritis,

^dP < 0.01 vs atrophic gastritis.