In each of six gastric cancer patients, repetitive extragenic palindromic PCR DNA fingerprints of 18 single colonies of Helicobacter pylori from the gastric antrum, corpus, and cardia were identical and matched that of the parental isolate. In three additional gastric cancer patients, 17 of 18 single-colony DNA fingerprints were identical to each other and to the DNA fingerprint of the corresponding parental isolate.
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Miehlke et al. (1999) studied this question.
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