Using a behavioural intervention to target nutrition during pregnancy may be key in meeting recommendations for healthy eating. The aim was to assess the use of a short-term dietary intake measurement tool (3-day food intake record) to infer long-term habitual dietary intake during pregnancy (using a short-form food frequency questionnaire). A convenience sample (n=90) between 12- and 18-weeks’ gestation were recruited from a larger randomised controlled trial for cross-sectional analysis. Participants completed a 44-item food frequency questionnaire and 3-day food intake record. Using the participant food intake record, the investigator blindly completed a second frequency questionnaire. The frequency questionnaires were scored using Dietary Quality Scores (DQS) and compared. Aggregate data were evaluated using a Wilcoxon signed rank test, and individual-level data were evaluated using a Bland-Altman plot. No significant difference was observed in the scores (Z=-1.88, p=0.06), with small effect size (r=0.19). The Bland-Altman plot showed that comparing the DQS derived from the two different dietary assessments underestimated scores by a mean difference of 0.4 points (95% limits of agreement: -3.50 to 4.26). The data points were evenly spread suggesting no systematic variation for over- or underestimation of scores. Minimal difference was observed between the functionality of the two assessment instruments. However, the food intake record can be completed by pregnant individuals to estimate short-term nutrient intake, and then scored by the investigator to estimate long-term dietary quality. Combining these two instruments may best capture the most accurate representation of dietary habits over time.

Multicenter clinical trials are essential for evaluating interventions but often face significant challenges in study design, site coordination, participant recruitment, and regulatory compliance. To address these issues, the National Institutes of Health’s National Center for Advancing Translational Sciences established the Trial Innovation Network (TIN). The TIN offers a scientific consultation process, providing access to clinical trial and disease experts who provide input and recommendations throughout the trial’s duration, at no cost to investigators. This approach aims to improve trial design, accelerate implementation, foster interdisciplinary teamwork, and spur innovations that enhance multicenter trial quality and efficiency. The TIN leverages resources of the Clinical and Translational Science Awards (CTSA) program, complementing local capabilities at the investigator’s institution. The Initial Consultation process focuses on the study’s scientific premise, design, site development, recruitment and retention strategies, funding feasibility, and other support areas. As of 6/1/2024, the TIN has provided 431 Initial Consultations to increase efficiency and accelerate trial implementation by delivering customized support and tailored recommendations. Across a range of clinical trials, the TIN has developed standardized, streamlined, and adaptable processes. We describe these processes, provide operational metrics, and include a set of lessons learned for consideration by other trial support and innovation networks.

Portable medical equipment (PME) is inconsistently cleaned and disinfected, resulting in contamination that increases the risk of healthcare-associated infections. A virtual reality PME cleaning and disinfection training module was designed and tested at multiple healthcare facilities. Barriers identified during an initial phase led to improvements in the second phase.

SHEA, in partnership with ASGE, APIC, AAMI, AORN, HSPA, IDSA, SGNA, and The Joint Commission, developed this multisociety infection prevention guidance document for individuals and organizations that engage in sterilization or high-level disinfection (HLD). This document follows the CDC Guideline for Disinfection and Sterilization in Healthcare Facilities. This guidance is based on a synthesis of published scientific evidence, theoretical rationale, current practices, practical considerations, writing group consensus, and consideration of potential harm when applicable. The supplementary material includes a summary of recommendations. The guidance provides an overview of the Spaulding Classification and considerations around manufacturers’ instructions for use (MIFUs). Its recommendations address: point-of-use treatment prior to sterilization or HLD, preparation of reusable medical devices at the location of processing, sterilization, and immediate use steam sterilization (IUSS), HLD of lumened and non-lumened devices, processing of reusable medical devices used with lubricating or defoaming agents, monitoring for effectiveness of processing, handling of devices after HLD, augments and alternatives to HLD, processing of investigational devices, tracking of reusable medical devices, and approaches to implementation.

We present a mathematical model to investigate heat transfer and mass transport dynamics in the wave-driven free-surface boundary layer of the ocean under the influence of long-crested progressive surface gravity waves. The continuity, momentum and convection–diffusion equations for fluid temperature are solved within a Lagrangian framework. We assume that eddy viscosity and thermometric conductivity are dependent on Lagrangian coordinates, and derive a new form of the second-order Lagrangian mass transport velocity, applicable across the entire finite water depth. We then analyse the convective heat dynamics influenced by the free-surface boundary layer. Rectangular distributions of free-surface temperature (i.e. a Dirichlet boundary condition) are considered, and analytical solutions for thermal boundary layer temperature fields are provided to offer insights into free-surface heat transfer mechanisms affected by ocean waves. Our results suggest the need to improve existing models that neglect the effects of free-surface waves and the free-surface boundary layer on ocean mass transport and heat transfer.

In vitro evidence of antidepressant-driven antibiotic resistance has recently been described. In this retrospective cohort study, significant associations are identified between antidepressant use and antibiotic resistance on urine cultures taken in the Emergency Department. This epidemiologic data supports previous in vitro work and raises additional questions for further study.

A major subglacial lake, Lake Snow Eagle (LSE), was identified in East Antarctica by airborne geophysical surveys. LSE, contained within a subglacial canyon, likely hosts a valuable sediment record of the geological and glaciological changes of interior East Antarctica. Understanding past lake activity is crucial for interpreting this record. Here, we present the englacial radiostratigraphy in the LSE area mapped by airborne ice-penetrating radar, which reveals a localized high-amplitude variation in ice unit thickness that is estimated to be ∼12 ka old. Using an ice-flow model that simulates englacial stratigraphy, we investigate the origin of this feature and its relationship to changes in ice dynamical boundary conditions. Our results reveal that local snowfall redistribution initiated around the early Holocene is likely the primary cause, resulting from a short-wavelength (∼10 km) high-amplitude (∼20 m) ice surface slope variation caused by basal lubrication over a large subglacial lake. This finding indicates an increase in LSE water volume during the Holocene, illustrating the sensitivity in volume of a major topographically constrained subglacial lake across a single glacial cycle. This study demonstrates how englacial stratigraphy can provide valuable insight into subglacial hydrological changes before modern satellite observations, both for LSE and potentially at other locations.

Objectives/Goals: This study investigates the contribution of the stool secretome (the soluble factors secreted by microbes into extracellular space) to in vitro α-synuclein (αSyn) oligomerization using stool cultures from patients with multiple system atrophy (MSA), a rare neurodegenerative disease hallmarked by pathologic αSyn aggregates. Methods/Study Population: Stool samples from MSA patients (n = 20), household controls (n = 20), and healthy controls (n = 20) will be cultured using an adapted dilution-to-extinction approach. The goal is to reduce microbial complexity progressively to produce random secretome combinations that may affect αSyn oligomerization differentially. The original inoculant and dilutions will be cultured anaerobically to collect conditioned media (CM) enriched with microbial secretomes. CM will be used to expose a fluorescence resonance energy transfer (FRET) biosensor assay and a Gaussia luciferase protein complementation assay – both modified to quantify αSyn-αSyn interaction indicating oligomerization. Any CM-altering αSyn oligomerization will undergo multiomic characterization to identify potential causative agent(s). Results/Anticipated Results: Specific microbe-produced molecules from the literature are anticipated to modulate αSyn oligomerization, identified by targeted, reductionist studies that selected and tested separately single microbial factors on αSyn aggregation in vitro and in vivo. From these studies, lipopolysaccharide and bacterial amyloid protein are expected to increase αSyn oligomerization, while short-chain fatty acids, such as butyrate, are expected to interfere with and decrease oligomerization. As a complementary systemic approach, this study’s agnostic methods involving MSA stool culture combined with the proposed dilution-to-extinction method are expected to identify additional MSA stool secretome components modulating αSyn oligomerization that might otherwise be missed in earlier reductionist approaches. Discussion/Significance of Impact: Completion of this reverse-translational work will aid in discovering MSA stool secretome components modulating αSyn oligomerization. Identification of specific factors contributing to pathologic αSyn behavior might set the stage for patient screenings for identified stool markers and could lead to microbiome-based interventions for MSA.

Understanding the development and use of musical instruments in prehistory is often hampered by poor preservation of perishable materials and the relative rarity of durable examples. Here, the authors present a pair of third-millennium BC copper cymbals, excavated at Dahwa, Oman. Although they are the only well-contextualised examples from Arabia, the Dahwa cymbals are paralleled by contemporaneous examples from the Indus Valley and images in Mesopotamian iconography. Not only do the cymbals add to the body of evidence interpreted in terms of Indus migrants in Early Bronze Age Oman, they also suggest shared musical and potentially ritual practices around the Arabian Gulf at that time.

Paediatric ventricular assist device patients, including those with single ventricle anatomy, are increasingly managed outside of the ICU. We used retrospective chart review of our single centre experience to quantify adverse event rates and ICU readmissions for 22 complex paediatric patients on ventricular assist device support (15 two ventricles, 7 single ventricle) after floor transfer. The median age was 1.65 years. The majority utilised the Berlin EXCOR (17, 77.3%). There were 9 ICU readmissions with median length of stay of 2 days. Adverse events were noted in 9 patients (41%), with infection being most common (1.8 events per patient year). There were no deaths. Single ventricle patients had a higher proportion of ICU readmission and adverse events. ICU readmission rates were low, and adverse event rates were comparable to published rates suggesting ventricular assist device patients can be safely managed on the floor.

Maternal health and nutrition in early pregnancy play a vital role in the growth and development of the foetus. During this time, macro and micronutrients contribute to nutritional programming, which helps form the foundations of the foetus’s life course health outcomes. This study aimed to investigate dietary habits, macro and micronutrient intake, micronutrient status, and folic acid supplement adherence among Emirati pregnant women in their first trimester. Data were collected according to the UAE-BCS study protocol, which was set up to investigate maternal nutrition, health, child growth, and developmental outcomes within the first 1000 days. Pregnant Emirati women with singleton pregnancies within their first trimester of pregnancy (between 8 and 12 weeks of gestation) were enrolled. The 24-hour food recall method was administered to collect dietary intake. The maternal mean average age was 29 years. Participants had high adherence to supplementation during pregnancy compared to preconception. The mean energy intake was 1345kcal, and 56% of participants consumed saturated fats above the acceptable macronutrient distribution ranges (AMDR), while 94% consumed below AMDR for total fibre. The consumption of micronutrients was below the recommended dietary allowance (RDA). Biochemical results show a high prevalence of low haemoglobin (74%) and deficiencies in vitamin D (39%) and vitamin E (96%). There is a need for research into dietary patterns and influences in pregnant women in the UAE. Furthermore, investigations of knowledge practices and attitudes towards supplementation and the factors contributing to folic acid supplement use are needed to inform government strategies and interventions.

The recent expansion of cross-cultural research in the social sciences has led to increased discourse on methodological issues involved when studying culturally diverse populations. However, discussions have largely overlooked the challenges of construct validity – ensuring instruments are measuring what they are intended to – in diverse cultural contexts, particularly in developmental research. We contend that cross-cultural developmental research poses distinct problems for ensuring high construct validity owing to the nuances of working with children, and that the standard approach of transporting protocols designed and validated in one population to another risks low construct validity. Drawing upon our own and others’ work, we highlight several challenges to construct validity in the field of cross-cultural developmental research, including (1) lack of cultural and contextual knowledge, (2) dissociating developmental and cultural theory and methods, (3) lack of causal frameworks, (4) superficial and short-term partnerships and collaborations, and (5) culturally inappropriate tools and tests. We provide guidelines for addressing these challenges, including (1) using ethnographic and observational approaches, (2) developing evidence-based causal frameworks, (3) conducting community-engaged and collaborative research, and (4) the application of culture-specific refinements and training. We discuss the need to balance methodological consistency with culture-specific refinements to improve construct validity in cross-cultural developmental research.