Geographic distribution of vacA allelic types of Helicobacter pylori

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Geographic distribution of vacA allelic types of Helicobacter pylori Leen–Jan Van Doorn, Céu Figueiredo, Francis Mégraud, Salvador Pena, Peter Midolo, Dulciene Maria De Magalhães Queiroz, Fátima Carneiro, Bart Vanderborght, Maria Da Glória F. Pegado, Ricardo Sanna, Wink De Boer, Peter M. Schneeberger, Pelayo Correa, Enders K.W. Ng, John Atherton, Martin J. Blaser, Wim G.V. Quint  Gastroenterology  Volume 116, Issue 4, Pages 823-830 (April 1999) DOI: 10.1016/S0016-5085(99)70065-X Copyright © 1999 American Gastroenterological Association Terms and Conditions

Fig. 1 Distribution of vacA s- and m-region and cagA genotypes of H. pylori strains from different parts of the world. For each region, the prevalence of each type (s1a, s1b, s1c, s2, m1, m2a, and m2b; cagA positive) is given as a percentage of the total number of strains (shown in parentheses). Only strains containing a single vacA genotype are represented. Gastroenterology 1999 116, 823-830DOI: (10.1016/S0016-5085(99)70065-X) Copyright © 1999 American Gastroenterological Association Terms and Conditions