Free recombination within Helicobacter pylori

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 linkage equilibrium by using the Homoplasy Test and compatibility matrices. Horizontal genetic exchange in H. pylori is so frequent that different loci and polymorphisms within each locus are all at linkage equilibrium. These results indicate that H. pylori is panmictic. Comparisons with sequences from Escherichia coli, Neisseria meningitidis, and Drosophila melanogaster showed that recombination in H. pylori was much more frequent than in other species. In contrast, when multiple family members infected with H. pylori were investigated, some strains were indistinguishable at all three loci. Thus, H. pylori is clonal over short time periods after natural transmission.

La oda a la música de Fray Luis de León /

With: La existencia como economía y como caridad / Antonio Caso. -- México : Porrúa Hermanos, 1916.

Discursos a la nación mexicana, por Antonio Caso.

La cultura latina y nuestra América.--El genio español.--El descubrimiento de América.--Catolicismo, jacobinismo y positivismo.--El bovarismo nacional.--Comento breve de la Oda a la música de Fray Luis de León.--Justo Sierra, el amante, el escéptico, el historiador.--La filosofía moral de Hostos.--Estudios indostánicos, por José Vasconcelos.--Educar, arte de filósofos.--Nuestra misión humana.

Labour conditions in the West Indies : report /

Errata slip inserted.

Der Rechtsbegriff auf Grundlage der Stammlerschen Sozialphilosophie.

Bibliographical footnotes.

The works of Christopher Marlowe /

"The text reproduces faithfully ... that of the most reliable version of each work ... and ... has in no sense been 'modernized.'"--Pref.

The cradle song and other plays /

Introduction--The cradle song (Canción de cuna).--The lover (El enamorado).--Love magic (Hechizo de amor).--Poor John (El pobrecito Juan).--Madame Pepita, translated in collaboration with May Heywood Broun.

Outline of glacial geology,

Reproduced from type-written copy.

Changing winds: a novel,

Mode of access: Internet.

Alice and a family: a story of south London,

Mode of access: Internet.

Mrs. martin's man.

Mode of access: Internet.

Pasture top-dressing with fertilizer and lime in the hay and pasture belt : a progress report /

Mode of access: Internet.

Alice and a family,

Mode of access: Internet.

Jane Clegg: a play in three acts.

Mode of access: Internet.

The spirit of the new philosophy,

Mode of access: Internet.