Maternal Group B Streptococcal (GBS) Genital Tract Colonization at Term in Women who Have Asymptomatic GBS Bacteriuria

Objective: To determine the rate of positive group B streptococcus (GBS) cultures at 35–37 weeks gestation in women who have first trimester asymptomatic GBS bacteriuria. Methods: Pregnant women with asymptomatic first trimester GBS bacteriuria had genital cultures for GBS performed at 35–37 weeks gestational age. Serotyping was performed by the standard Lancefield capillary precipitin method. Results: Fifty-three women with positive urine cultures had genital cultures performed at 35–37 weeks. Sixteen of the 53 (30.2%; 95% confidence interval: 18.4–44.3%) third trimester vaginal cultures were positive for GBS. Five of eight (63%) of the women with typable urine serotypes had the same typable serotype in the third trimester genital culture. Conclusion: Genital tract cultures at 35–37 weeks for GBS correlate poorly with first trimester asymptomatic GBS bacteriuria. Recommendations for GBS prophylaxis in labor in women who have first trimester asymptomatic GBS bacteriuria should be investigated further and reconsidered

Antigen detected by a monoclonal antibody (345.123s) Produced against human melanoma cells.

Oriented powder samples of NaxCoO2, with quasi single phase composition have been synthesized and studied by x rays, SQUID magnetometry, 23Na and 59Co NMR. We evidence that the dry and superconducting (SC) samples with x ≈ 0.35 differ from those with 0.50 ≤ x < 1 inasmuch as the Co sites display an uniform charge state in the former while they differentiate markedly in the latter. For 0.50 ≤ x < 1, the local Co charge and magnetic properties appear correlated with definite orderings of the Na+ ions. For x ≃ 0.70 we could distinguish non magnetic Co3+ sites with no spin susceptibility from more magnetic Co sites, among which Co4+ sites can be excluded. These sites form a single strongly correlated electronic band which exhibits a quasi localized T dependent magnetism which might only become Fermi liquid like below 2K. This contrasts with the Pauli like magnetism found for x ≈ 0.35 in the dry and SC compounds. Those display quasi identical metallic states, with a weak spin susceptibility which only contributes to a small shift of the 59Co NMR. Its variation below Tc reveals a strong suppression of the spin susceptibility, compatible with singlet superconducting pairing. © EDP Sciences