From: Low Helicobacter pylori primary resistance to clarithromycin in gastric biopsy specimens from dyspeptic patients of a city in the interior of São Paulo, Brazil
PUD (n = 123)
CG (n = 706)
N (n = 290)
His+
His-
T
PCR+
63
13
76
286
89
375
1
36
37
488
PCR-
14
33
47
86
245
331
252
253
631
77
46
123
372
334
706
2
288
290
1119