We agree with Drs Achtman and Suerbaum that the high frequency of recombination plays a
major role in increasing polymorphism in Helicobacter pylori. However, it is obvious that …

Helicobacter pylori is one of the most common pathogenic bacteria infecting humans. It is
estimated that more than half of the human population is chronically colonized with this …

The pathogenic bacterium Helicobacter pylori infects half of the human population and it is
one of the most genetically diverse bacterial species known. The unusual combination of …

Helicobacter pylori has a recombinational, or panmictic, population structure, which is
indicative of frequent genetic exchange among strains. Horizontal gene exchange may …

Sequences of three gene fragments (flaA, flaB, and vacA) from Helicobacter pylori strains
isolated from patients in Germany, Canada, and South Africa were analyzed for diversity and …

For Helicobacter pylori, which exhibits substantial genetic diversity, many strains are
naturally competent for transformation by exogenous DNA. To better understand the …

Genetic recombination can be important evolutionarily in speeding the adaptation of
organisms to new environments and in purging deleterious mutations. Here, we describe …

Many strains of Helicobacter pylori are naturally competent for transformation in vitro. Since
there is a high degree of genetic variation among H. pylori strains, we sought to determine …

The gastric pathogen Helicobacter pylori shows tremendous genetic variability within human
populations, both in gene content and at the sequence level. We investigated how this …

Helicobacter pylori populations recovered from the human stomach display extensive
recombination and quasispecies development, and this suggests frequent exchange of DNA …