Christine Martin

Giant improper ferroelectricity in the ferroaxial magnet CaMn7O12.

In rhombohedral

Stx2 Subtyping of Shiga Toxin-Producing Escherichia coli Isolated from Cattle in France: Detection of a New Stx2 Subtype and Correlation with Additional Virulence Factors

{\mathrm{CaMn}}_{7}{\mathrm{O}}_{12}

Molecular Analysis of Shiga Toxin-Producing Escherichia coli Strains Isolated from Hemolytic-Uremic Syndrome Patients and Dairy Samples in France

, an improper ferroelectric polarization of magnitude

Perovskite manganites and layered cobaltites: potential materials for thermoelectric applications

2870\text{ }\text{ }\ensuremath{\mu}\mathrm{C}\text{ }{\mathrm{m}}^{\ensuremath{-}2}

Heterogeneity of Shiga Toxin-Producing Escherichia coli Strains Isolated from Hemolytic-Uremic Syndrome Patients, Cattle, and Food Samples in Central France

is induced by an incommensurate helical magnetic structure that evolves below

Magnetic field induced ferroelectric loop in Bi0.75Sr0.25FeO3−δ

{T}_{\mathrm{N}1}=90\text{ }\text{ }\mathrm{K}

Association of Virulence Genotype with Phylogenetic Background in Comparison to Different Seropathotypes of Shiga Toxin-Producing Escherichia coli Isolates

. The electric polarization was found to be constrained to the high symmetry threefold rotation axis of the crystal structure, perpendicular to the in-plane rotation of the magnetic moments. The multiferroicity is explained by the ferroaxial coupling mechanism, which in

FeCr2O4 and CoCr2O4 spinels: Multiferroicity in the collinear magnetic state?

{\mathrm{CaMn}}_{7}{\mathrm{O}}_{12}

On the strong impact of doping in the triangular antiferromagnet CuCrO2

gives rise to the largest magnetically induced, electric polarization measured to date.

Localization of the insertion site and pathotype determination of the locus of enterocyte effacement of shiga toxin-producing Escherichia coli strains.

ABSTRACT At least 11 Stx2 variants produced by Shiga toxin-producingEscherichia coli (STEC) isolated from patients and animals have been described. The Stx2 subtyping of STEC isolated from healthy cows positive for stx2 (n = 104) or stx2 and stx1(n = 63) was investigated. Stx2vh-b, Stx2 (renamed Stx2-EDL933), and Stx2vh-a were the subtypes mostly detected among the bovine isolates (39.5, 39, and 25.5%, respectively). Stx2e was not present, and subtypes included in the Stx2d group (Stx2d-OX3a, Stx2d-O111, and Stx2d-Ount) were found infrequently among the isolates examined (8.5%). A combination of two distinct Stx2 subtypes was observed among 23.5% of the strains. For the first time, a combination of three subtypes (Stx2-EDL933/Stx2vh-b/Stx2d and Stx2vh-a/Stx2vh-b/Stx2d) was detected (3.5% of the isolates). In addition, bovine STEC harboring stx1 and one or two stx2 genes appeared highly cytotoxic toward Vero cells. A new Stx2 subtype (Stx2-NV206), present among 14.5% of the isolates, showed high cytotoxicity for Vero cells. Two amino acid residues (Ser-291 and Glu-297) important for the activation of Stx2 by human intestinal mucus were conserved on the Stx2-NV206 A subunit. The gene encoding Ehx enterohemolysin was prominent among STEC harboringstx2-EDL933 alone (78%) or a combination ofstx2-EDL933 andstx2vh-b (85%). In addition, Stx2-EDL933 and/or Stx2vh-b subtypes were highly associated with other putative virulence factors such as Stx1 and EspP extracellular serine protease, but not with EAST1 enterotoxin.