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Lower maternal serum vitamin B12 (B12) and folate levels have been associated with lower offspring birthweight, in observational studies. The aim of this study was to investigate whether this relationship is causal.
We performed two-sample Mendelian randomization (MR) using summary data on associations between genotype-B12 (10 genetic variants) or genotype-folate (four genetic variants) levels from a genome-wide association study of 45576 individuals (sample 1); and both maternal- and fetal-specific genetic effects on offspring birthweight from the latest Early Growth Genetics consortium meta-analysis with 297356 individuals reporting their own birthweight and 210248 women reporting their offspring's birthweight (sample 2). We used the inverse variance weighted method, and sensitivity analyses to account for pleiotropy, in addition to excluding a potentially pleiotropic variant in the FUT2 gene for B12 levels.
We did not find evidence for a causal effect of maternal or fetal B12 levels on offspring birthweight. The results were consistent across the different methods. find more We found a positive causal effect of maternal folate levels on offspring birthweight [0.146 (0.065, 0.227), which corresponds to an increase in birthweight of 71 g per 1 standard deviation higher folate]. We found some evidence for a small inverse effect of fetal folate levels on their own birthweight [-0.051 (-0.100, -0.003)].
Our results are consistent with evidence from randomized controlled trials that higher maternal folate levels increase offspring birthweight. We did not find evidence for a causal effect of B12 levels on offspring birthweight, suggesting previous observational studies may have been confounded.
Our results are consistent with evidence from randomized controlled trials that higher maternal folate levels increase offspring birthweight. We did not find evidence for a causal effect of B12 levels on offspring birthweight, suggesting previous observational studies may have been confounded.Unsafe abortion practices remain the major contributor to maternal death in Uganda, impeding the achievement of universal health coverage and quality of maternal health care. Using an ethnographic design and critical discourse analysis, we explored the operations of power in setting maternal healthcare priorities, as evident at the 2018 Reproductive, Maternal, Neonatal, Child and Adolescents Health Conference. Observational data were collected of the policy-making activities, processes and events and key informant interviews were conducted with 27 participants. We describe how neoliberal and state governance through the structure and organization of policy-making, epistemic governance and universal concepts of 'high-impact' interventions, results-based financing, cost-effectiveness and accountability converge to suppress the articulation of local conditions associated with unsafe and risky abortion. By defining maternity along the continuum of birth and emphasizing birthing women, priority-setting was directed towards interventions promoting women's normative role as mothers while suppressing unmet abortion care needs. Finally, discursive and communicative materials controlled how women of reproductive age in Uganda managed reproduction.
Typhoid fever, caused by S. enterica ser. Typhi, continues to be a substantial health burden in developing countries. Little is known of the genotypic diversity of S. enterica ser. Typhi in Zimbabwe, but this is key for understanding the emergence and spread of this pathogen and devising interventions for its control.
To report the molecular epidemiology of S. enterica ser. Typhi outbreak strains circulating from 2012 to 2019 in Zimbabwe, using comparative genomics.
A review of typhoid cases records from 2012 to 2019 in Zimbabwe was performed. The phylogenetic relationship of outbreak isolates from 2012 to 2019 and emergence of antibiotic resistance was investigated by whole-genome sequence analysis.
A total 22 479 suspected typhoid cases, 760 confirmed cases were reported from 2012 to 2019 and 29 isolates were sequenced. The majority of the sequenced isolates were predicted to confer resistance to aminoglycosides, β-lactams, phenicols, sulphonamides, tetracycline and fluoroquinolones (including qnrS detection). The qnrS1 gene was associated with an IncN (subtype PST3) plasmid in 79% of the isolates. Whole-genome SNP analysis, SNP-based haplotyping and resistance determinant analysis showed that 93% of the isolates belonged to a single clade represented by multidrug-resistant H58 lineage I (4.3.1.1), with a maximum pair-wise distance of 22 SNPs.
This study has provided detailed genotypic characterization of the outbreak strain, identified as S. Typhi 4.3.1.1 (H58). The strain has reduced susceptibility to ciprofloxacin due to qnrS carried by an IncN (subtype PST3) plasmid resulting from ongoing evolution to full resistance.
This study has provided detailed genotypic characterization of the outbreak strain, identified as S. Typhi 4.3.1.1 (H58). The strain has reduced susceptibility to ciprofloxacin due to qnrS carried by an IncN (subtype PST3) plasmid resulting from ongoing evolution to full resistance.In March 2019, the California Animal Health and Food Safety Laboratory (CAHFS), Turlock branch, received two submissions of broiler chickens from commercial flocks reporting increased mortality. Submissions consisted of either white or brown broilers. Submitted chickens appeared depressed with ruffled feathers. At necropsy, moderate to severely enlarged and pale kidneys were observed, with gross lesions indicative of dehydration. Microscopically, renal tubules were degenerated and distended with necrotic debris and tubular casts. The kidney parenchyma contained mononuclear inflammatory cell infiltrates and interstitial edema. Infectious bronchitis virus (IBV) was isolated and identified by reverse transcription quantitative PCR from kidney tissue pools and tracheal swab pools from both cases. Partial sequencing of the S1 hypervariable region was most similar to a local California variant, CA1737. The outbreak lasted roughly 1 wk in both flocks, with 2% total mortality in the brown broilers and 20% total mortality in the white broilers.
Here's my website: https://www.selleckchem.com/
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