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Genotypic, phenotypic, and clinical characteristics of isolates of Helicobacter pylori from San Luis, Argentina

C.M. Mattana, A.E. Vega, F. Escobar, L. Sabini, S. Zanón, O.N. Puig de Centorbi

. 2007 ; 52 (5) : 519-524.

Jazyk angličtina Země Česko

Perzistentní odkaz   https://www.medvik.cz/link/bmc07504131

The vacA and cagA genotypes of Helicobacter pylori exhibited distinct geographic distribution and correlation with severity of disease. In the above genotypes (obtained from 150 H. pylori-positive patients--139 with gastritis, 10 with ulcer and 1 patient with gastric cancer) combinations vacA s1/m1 and s2/m2 were detected using PCR in 75 and 25% of isolates, respectively, in patients with chronic gastritis. The of s1/m1 and s2/m2 combinations were also detected from ulcers (60 and 40%, respectively). The cagA was detected in 30% of isolates. Concentrated culture supernatants of 7 (64%) out of 11 H. pylori strains induced vacuolization in Vero cells in titers ranging from 1:5 to 1:40. The vacA s1 genotype was significantly associated with, but not predictive of the presence of vacuolating cytotoxin activity and the cagA gene.

Citace poskytuje Crossref.org

Bibliografie atd.

Lit.: 38

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$a The vacA and cagA genotypes of Helicobacter pylori exhibited distinct geographic distribution and correlation with severity of disease. In the above genotypes (obtained from 150 H. pylori-positive patients--139 with gastritis, 10 with ulcer and 1 patient with gastric cancer) combinations vacA s1/m1 and s2/m2 were detected using PCR in 75 and 25% of isolates, respectively, in patients with chronic gastritis. The of s1/m1 and s2/m2 combinations were also detected from ulcers (60 and 40%, respectively). The cagA was detected in 30% of isolates. Concentrated culture supernatants of 7 (64%) out of 11 H. pylori strains induced vacuolization in Vero cells in titers ranging from 1:5 to 1:40. The vacA s1 genotype was significantly associated with, but not predictive of the presence of vacuolating cytotoxin activity and the cagA gene.
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