Börsch: I wish to comment on the problem of a higher positive rate with histology versus with microbiology. We did a formal study in 149 patients comparing biopsy urease tests and histology, and we found the same thing in antral biopsies. We had 48% positive CLO tests and 62% positive histologies by modified Giemsa stain. We considered some of the latter to be false positives. After grading the histologic density of bacteria, we found these “false” positives predominantly to be grade 1 according to Marshall’s grading. So we came to the conclusion that our histological examination gave false positives among the 1 gradings, but we did not have cultures to really rectify this assumption.