Frequencies of the expression of main protein antigens from Helicobacter pylori isolates and production of specific serum antibodies in infected patients

Table 2 Detection results for the expressions of UreB, VacA, CagA1, HpaA, NapA, FlaA and FlaB in H pylori isolates.

Antigens	Cases (n)	Positive standard values (A490)	Value range of samples (A490)	Positive cases (n)	Positive rates (%)
UreB	125	0.25	0.47-1.93	125	100
VacA	125	0.21	0.27-1.73	82	65.6
CagA1	125	0.54	0.55-0.97	116	92.8
HpaA	125	0.34	0.52-1.94	125	100
NAP	125	0.36	0.36-1.23	117	93.6
FlaA	125	0.34	0.36-2.01	125	100
FlaB	125	0.3	0.31-1.78	124	99.2