Publications by authors named "Robert Brennan"

Ticks represent important vectors of a number of bacterial and viral disease agents, owing to their hematophagous nature and their questing behavior (the process in which they seek new hosts). Questing activity is notably seasonal with spatiotemporal dynamics that needs to be understood in detail as part of mediating and mitigating tick-borne disease risk. Models of the geography of tick questing activity developed to date, however, have ignored the temporal dimensions of that behavior; more fundamentally, they have often not considered the sampling underlying available occurrence data.

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Previous work has reported that the extent to which participants dehumanized criminals by denying them uniquely human character traits such as refinement, rationality and morality predicted the severity of the punishment endorsed for them. We revisit this influential finding across six highly powered and pre-registered studies. First, we conceptually replicate the effect reported in previous work, demonstrating that our method is sensitive to detecting relationships between trait-based dehumanization and punishment should they occur.

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The states of Kansas and Oklahoma, in the central Great Plains, lie at the western periphery of the geographic distributions of several tick species. As the focus of most research on ticks and tick-borne diseases has been on Lyme disease which commonly occurs in areas to the north and east, the ticks of this region have seen little research attention. Here, we report on the phenology and activity patterns shown by tick species observed at 10 sites across the two states and explore factors associated with abundance of all and life specific individuals of the dominant species.

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Introduction: Improved mentoring of midcareer researchers in medical schools has been identified as an important potential avenue for addressing low vitality and high burnout rates in faculty, and the scarcity of both underrepresented minority (URM) faculty and women in biomedical research. To address the need for widescale effective mentoring, we sought to determine whether a group peer mentoring intervention (C-Change Mentoring and Leadership Institute) for early midcareer research faculty was effective for different demographic groups in a controlled trial.

Methods And Materials: Thirty-five diverse early midcareer faculty and 70 propensity-matched (PM) control subjects matched to intervention subjects on a) study inclusion criteria; b) gender, race, and ethnicity, degree, rank, years of experience, publications, grants; and c) pretest survey outcome variables, participated in the intervention.

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Clostridioides difficile infection (CDI) remains a significant cause of morbidity and mortality worldwide. Historically, two antibiotics (metronidazole and vancomycin) and a recent third (fidaxomicin) have been used for CDI treatment; convincing data are now available showing that metronidazole is the least efficacious agent. The European Society of Clinical Microbiology and Infectious Diseases (ESCMID) management guidance for CDI were updated in 2021.

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Objective: Conflict-affected youth are at risk for poor psychological and social outcomes, yet few receive mental health services. Strategies to expand access and sustain evidence-based interventions (EBIs) across novel delivery platforms must be tested. The present study was a hybrid type II implementation-effectiveness trial using a cluster randomized design.

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Introduction: Midcareer is a critical transition point for biomedical research faculty and a common dropout point from an NIH-funded career. We report a study to assess the efficacy of a group peer mentoring program for diverse biomedical researchers in academic medicine, seeking to improve vitality, career advancement, and cross-cultural competence.

Methods: We conducted a stratified randomized controlled trial with a waitlist control group involving 40 purposefully diverse early midcareer research faculty from 16 states who had a first-time NIH R01 (or equivalent) award, a K training grant, or a similar major grant.

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Article Synopsis
  • Midcareer research faculty in U.S. medical schools are facing challenges related to recruitment, retention, and high burnout rates, highlighting their critical role in advancing science.
  • An online survey involving physician investigators and Ph.D. scientists revealed that many reported inadequate mentoring, with significant numbers experiencing burnout and low vitality, which are linked to intentions to leave academia.
  • Findings showed that women encountered more burnout and difficulties in work-life balance compared to men, and quality mentoring was crucial in mitigating these issues, emphasizing the need for effective support systems in the biomedical workforce.
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Bacterial infections caused by Gram-negative pathogens, such as those in the family Enterobacteriaceae, are among the most difficult to treat because effective therapeutic options are either very limited or non-existent. This raises serious concern regarding the emergence and spread of multi-drug resistant (MDR) pathogens in the community setting; and thus, creates the need for discovery efforts and/or early-stage development of novel therapies for infections. Our work is directed towards branched polyethylenimine (BPEI) modified with polyethylene glycol (PEG) as a strategy for targeting virulence from Gram-negative bacterial pathogens.

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This article extends multivariate generalizability theory (MGT) to tests with different random-effects designs for each level of a fixed facet. There are numerous situations in which the design of a test and the resulting data structure are not definable by a single design. One example is mixed-format tests that are composed of multiple-choice and free-response items, with the latter involving variability attributable to both items and raters.

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(white-tailed deer) is the primary host of adult (deer tick). Most of the research into has been geographically restricted to the northeastern United States, with limited interest in Oklahoma until recently as the populations spread due to climate change. Ticks serve as a vector for pathogenic bacteria, protozoans, and viruses that pose a significant human health risk.

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Background: During the COVID-19 pandemic, universities transitioned to primarily online delivery, and it is important to understand what implications the transition back to in-person activities may have on spread of SARS-CoV-2 in the student population. The specific aim of our study was to provide insights into the effect of timetabling decisions on the spread of SARS-CoV-2 in a population of undergraduate engineering students.

Methods: We developed an agent-based modelling simulation that used a Canadian first-year undergraduate engineering program with an enrolment of 180 students in 5 courses of 12.

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Background: During the 2014-15 Ebola Virus Disease (EVD) epidemic, thousands of people in Sierra Leone were infected with the devastating virus and survived. Years after the epidemic was declared over, stigma toward EVD survivors and others affected by the virus is still a major concern, but little is known about the factors that influence stigma toward survivors. This study examines how key personal and ecological factors predicted EVD-related stigma at the height of the 2014-2015 epidemic in Sierra Leone, and the personal and ecological factors that shaped changes in stigma over time.

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Objectives: Older displaced persons often receive limited attention from aid organizations, policy-makers and service providers in countries of resettlement. The objective of this study is to identify the relationship between experiencing traumatic events and stressors prior to resettlement, current resettlement stressors, social support, and mental health of older Bhutanese with a refugee life experience.

Method: Study participants were 190 older Bhutanese with a refugee life experience living in a metropolitan area in New England (US) and Ontario (Canada).

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Countering violent radicalization is a priority in many countries, prompting research that assesses attitudes and beliefs about violent radicalization in the general population. The majority of violent radicalization assessments have been developed among specific populations, with limited investigation into the generalizability and cross-cultural applicability of measurement tools. A transcultural investigation raises questions about the implicit assumptions and norms that inform instrument development.

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Article Synopsis
  • - Over the last 30 years, infections from tick-borne diseases like ehrlichiosis and Rocky Mountain spotted fever have been on the rise in Oklahoma, but there's limited data on these pathogens in urban settings.
  • - A study was conducted in two parks in Edmond, Oklahoma, where researchers collected 434 lone star ticks and analyzed them for tick-borne pathogens using qPCR methods.
  • - The results showed that 33.6% of the ticks were positive for some pathogens, while 15.2% tested positive for others, highlighting the potential risk of tick-borne diseases in urban areas.
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  • The study investigates the Sugira Muryango (SM) home-visiting intervention in Rwanda to support early childhood development (ECD) and reduce violence among families living in extreme poverty compared to usual care (UC).
  • Families with children aged 6-36 months were randomly assigned to either the SM intervention or UC, and child development was measured using various assessment tools, while violence and father engagement were also evaluated.
  • Results showed SM families had significant improvements in child development skills, increased father engagement, and reduced instances of harsh discipline and intimate partner violence, though no improvements were noted in other developmental assessments or child growth.
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Background: Many AIDS Drug Assistance Programs (ADAPs) purchased Affordable Care Act (ACA) Qualified Health Plans (QHPs) for low-income people living with HIV (PLWH). To date, little has been published about PLWH's perspective on the ACA. We explored ACA knowledge, HIV stigma, trust in the healthcare system, and ACA attitudes among PLWH with ADAP-funded QHPs in Virginia.

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Background: This article describes the incorporation of an evidence-based mental health intervention, the Youth Readiness Intervention (YRI), into a youth entrepreneurship training program in Sierra Leone. A collaborative team approach (CTA) was used as the implementation strategy to address the human resource shortage and related challenges associated with capacity and access to care.

Methods: A cluster randomized quasi-experimental pilot trial (N=175) was conducted in one rural district of Sierra Leone.

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Background: Millions of people worldwide experience severe trauma in their lifetime. Trauma has immediate and long-term effects on emotional wellbeing. Moreover, the experiences of one generation may influence subsequent generations via social and biological pathways.

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Background: Globally, one in four children lives in a country affected by armed conflict or disaster often accompanied by exposure to a range of adversities including violent trauma and loss. Children involved with armed groups (often referred to as "child soldiers") typically exhibit high levels of mental health needs linked to their experiences. The Longitudinal Study of War-Affected Youth (LSWAY) in Sierra Leone is a seventeen-year prospective longitudinal study of the long-term effects of children's experiences in the country's eleven-year (1991-2002) civil war on their adult mental health and functioning in addition to exploring the potential mechanisms by which intergenerational transmission of emotional and behavioral disruptions due to war trauma may operate.

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Background: Former child soldiers are at elevated risk for mental health problems (e.g., traumatic stress, emotion dysregulation, and internalizing and externalizing problems).

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Infections from antibiotic-resistant Staphylococcus aureus and Pseudomonas aeruginosa are a serious threat because reduced antibiotic efficacy complicates treatment decisions and prolongs the disease state in many patients. To expand the arsenal of treatments against antimicrobial-resistant (AMR) pathogens, 600-Da branched polyethylenimine (BPEI) can overcome antibiotic resistance mechanisms and potentiate β-lactam antibiotics against Gram-positive bacteria. BPEI binds cell-wall teichoic acids and disables resistance factors from penicillin binding proteins PBP2a and PBP4.

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Background: Sugira Muryango is a father-engaged early child development and violence-prevention home-visiting programme delivered by trained lay workers. This cluster-randomised trial evaluates whether families living in extreme poverty (Ubudehe 1, the poorest category in the Government of Rwanda's wealth ranking) who receive Sugira Muryango in combination with a government-provided social protection programme demonstrate greater responsive, positive caregiving, nutrition, care seeking, hygiene, and father involvement compared with control families receiving usual care (UC).

Methods: Using detailed maps, we grouped closely spaced villages into 284 geographic clusters stratified by the type of social protection programmes operating in the village clusters; 198 clusters met all enrolment criteria.

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Purpose: There are disparities in mental health of refugee youth compared with the general U.S.

Population: We conducted a pilot feasibility and acceptability trial of the home-visiting Family Strengthening Intervention for refugees (FSI-R) using a community-based participatory research approach.

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