24 results on '"Kessler, S."'
Search Results
2. Probability of Detection: A Reliability Assessment Approach for Structural Health Monitoring Systems in Civil Engineering
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Kanzler, D., primary, Rentala, V., additional, Jaelani, Y., additional, and Keßler, S., additional
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- 2024
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3. Untersuchungen zum zellulären Tropismus in H18N11-Influenza-A infizierten Jamaikanischen Fruchtfledermäusen (Artibeus jamaicensis) auf Einzelzellebene
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Schinköthe, J., Kessler, S., Burke, B., Hamberger, L., Börries, M., Andrieux, G., Kacza, J., Beer, M., Schwemmle, M., Ulrich, R., Schountz, T., and Ciminski, K.
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- 2024
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4. Revisionsendoprothetik: Der Einfluss der Operationsdauer auf die perioperative Morbidität
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Kessler, S, Käfer, W, Kinkel, S, and Puhl, W
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- 2024
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5. Biokompatibilität und Osseointegration von β-TCP: Histomorphologische und biomechanische Studien in einem belasteten Schafsmodell
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Koepp, HE, Kessler, S, Brenner, R, Günther, KP, and Ignatius, A
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- 2024
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6. Revisionshüftendoprothetik: Analyse der Validität und Reliabilität radiologischer Defektklassifikationen
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Käfer, W, Fraitzl, CR, Kinkel, S, Puhl, W, and Kessler, S
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- 2024
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7. Fußerhaltende Operationen bei abakteriellen und bakteriellen Rückfußdestruktionen
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Kessler, S, Rucker, A, Denzinger, S, and Mutschler, W
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- 2024
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8. Revisionshüftendoprothetik: Wie beeinflussen der metaphysäre Prothesenaufsitz, der diaphysäre Formschluss und der 3-Punkte-Schaftkontakt das postoperative Sinterungsverhalten eines zementfreien Revisionsgeradschaftes?
- Author
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Kessler, S, Kinkel, S, Käfer, W, and Puhl, W
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- 2024
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9. Community Organizations, Local Health Equity Action Teams, and a Learning Collaborative to Address COVID-19 Disparities in Urban and Rural Communities.
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Ellerbeck EF, Collie-Akers VL, Ablah E, Landry S, Honn A, Obermeier S, Ramirez M, Chen Y, Knight IR, Lumpkins CY, Ricketts M, Carter T, Wright U, Watson C, Kurz DL, McCrea-Robertson S, Finocchario-Kessler S, LeMaster J, Corriveau E, Crawford B, He J, and Greiner KA
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- Humans, Kansas, Urban Population, SARS-CoV-2, COVID-19 Testing, Health Status Disparities, Cooperative Behavior, COVID-19 epidemiology, COVID-19 prevention & control, Health Equity, Rural Population
- Abstract
Rapid Acceleration of Diagnostics-Underserved Populations (RADx-UP) Kansas worked with 10 Kansas counties from November 2020 through June 2022 to form local health equity action teams (LHEATs), develop COVID-19 testing strategies, foster communication about COVID-19, and share best practices through a learning collaborative. Participating counties documented 693 distinct COVID-19 testing and 178 communication activities. Although the intervention was not associated with changes in the proportion of positive COVID-19 tests, LHEATs in the learning collaborative implemented new testing strategies and responded to emerging COVID-19 challenges. ( Am J Public Health . 2024;114(11):1202-1206. https://doi.org/10.2105/AJPH.2024.307771).
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- 2024
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10. Jamaican fruit bats mount a stable and highly neutralizing antibody response after bat influenza virus infection.
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Kessler S, Stegen P, Zhan S, Schwemmle M, Reuther P, Schountz T, and Ciminski K
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- Animals, Influenza A virus immunology, Virus Shedding immunology, Chiroptera virology, Chiroptera immunology, Antibodies, Neutralizing immunology, Orthomyxoviridae Infections immunology, Orthomyxoviridae Infections virology, Orthomyxoviridae Infections veterinary, Antibodies, Viral immunology
- Abstract
Antibodies are an essential component of the antiviral response in many species, but to date, there is no compelling evidence that bats are capable of eliciting a robust humoral immunity, including neutralizing antibodies. Here, we report that infection of Jamaican fruit bats with the bat influenza A virus H18N11 elicits a rapid and stable humoral immune response with a strong neutralizing capacity, associated with no detectable viral shedding after repeat challenge infection. Thus, the neutralizing antibody response of bats might play an important role in the bat immunity., Competing Interests: Competing interests statement:The authors declare no competing interest.
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- 2024
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11. Local Health Equity Action Teams (LHEATS) as a Novel and Emerging Practice of the Communities Organizing to Promote Equity (COPE) Project in Kansas.
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Finocchario-Kessler S, Pacheco C, Morrow E, Bridges K, Ablah E, Collie-Akers V, Greiner KA, Knapp K, Honn A, Love J, Long N, Carrillo C, Darby T, Neira AM, Scott A, Ramírez M, Chen Y, Parente DJ, LeMaster JW, Corriveau E, Woodward J, Fitzgerald Wolff S, Ricketts M, and Ellerbeck EF
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- Kansas, Humans, Community Health Workers organization & administration, Health Promotion organization & administration, Capacity Building organization & administration, Leadership, Interviews as Topic, Health Equity organization & administration, Focus Groups
- Abstract
The Communities Organizing to Promote Equity (COPE) Project was implemented in 20 counties across Kansas to build capacity to address health equity by forming local health equity action teams (LHEATS), hiring and training community health workers, facilitating state-wide learning collaboratives, and tailoring communication strategies. We conducted interviews and focus groups with project stakeholders who identified pragmatic recommendations related to LHEAT formation and leadership, establishing trust, nurturing autonomy, and optimizing impact. Insights can improve future community-based health equity efforts. ( Am J Public Health . 2024;114(S7):S570-S574. https://doi.org/10.2105/AJPH.2024.307802).
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- 2024
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12. Transorbital intraoperative electrocorticography-guided surgical resection for medically refractory developmental epileptic encephalopathy with spike-wave activation in sleep.
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Baumgartner ME, Kessler S, Franco AJ, Tomlinson SB, and Kennedy BC
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Developmental epileptic encephalopathy with spike-wave activation in sleep (DEE-SWAS) is an epilepsy syndrome of childhood characterized by developmental delay or regression with significant abnormal epileptiform activity during sleep. In some cases, DEE-SWAS with an identified focal lesion is treated with surgical resection. The authors report an unusual case of focal DEE-SWAS that was successfully treated via transorbital resection with intraoperative electrocorticography (iECoG). The patient is an 11-year-old boy with a history of medication-responsive seizures who presented with cognitive and language decline. Electroencephalography demonstrated abnormal electrographic activity during sleep consistent with DEE-SWAS. Imaging and electrographic studies identified a probable epileptogenic zone anterior and adjacent to Broca's area. He underwent stereoelectroencephalography followed by focal resection with iECoG, which resulted in resolution of EEG abnormalities, improved word finding, and no further cognitive decline. While DEE-SWAS is not typically managed with surgical intervention, focal resection in carefully selected patients can achieve favorable outcomes., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
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- 2024
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13. Parental and child's psychosocial and financial burden living with an inherited metabolic disease identified by newborn screening.
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Schnabel-Besson E, Garbade SF, Gleich F, Grünert SC, Krämer J, Thimm E, Hennermann JB, Freisinger P, Burgard P, Gramer G, Morath MA, Tuncel AT, Keßler S, Hoffmann GF, Kölker S, and Mütze U
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Newborn screening (NBS) is one of the most effective measures of secondary prevention. While the benefit of NBS on the clinical long-term outcomes of children with inherited metabolic diseases (IMD) has been demonstrated, the potential burden of families living with an early diagnosed and treated child with an IMD has not been thoroughly investigated. The aim of this longitudinal questionnaire-based study on 369 families living with a child with an IMD was to investigate the psychosocial and financial burden following a true-positive NBS. The reported psychosocial burden differed between children and their parents, and was associated with the child's age, diagnosis, and treatment. At younger ages, parent-reported burden was higher for the parents than for the individual child, while it increased for children and decreased for parents as the child grew older. Furthermore, psychosocial burden increased if the child required a strict dietary treatment and was at risk of metabolic decompensation. Regardless of diagnosis and treatment, the developmental delay of their child independently increased the parental psychosocial burden. Financial burden was reported by 24% of all families, and was higher in low-income families and in families whose children required dietary treatment. In conclusion, a substantial psychosocial and financial burden was revealed for children and their families after true-positive NBS. Since this burden is likely to have a negative impact on the long-term individual health benefits of NBS, this study underlines the importance of regularly assessing the psychosocial and financial needs of these families., (© 2024 The Author(s). Journal of Inherited Metabolic Disease published by John Wiley & Sons Ltd on behalf of SSIEM.)
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- 2024
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14. Safety of Antiretroviral Exposure During Pregnancy: Opportunities to Close Data Gaps.
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Short WR, Miller ES, Simone J, Statton A, Finocchario-Kessler S, and Lampe M
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Pregnant persons with chronic health conditions often require pharmacotherapy to remain healthy. The Antiretroviral Pregnancy Registry is a prospective, international, voluntary, and exposure registry that collects information on antiretroviral (ARV) exposure; however, a minority of providers use the registry, leaving critical gaps to guide prescribing in this population. The Task Force for the Elimination of Perinatal HIV Transmission in the United States, funded by the Centers for Disease Control and Prevention, has identified the monitoring of ARV safety as a paramount concern in the ongoing mission to eliminate perinatal human immunodeficiency virus (HIV) transmission. As active members of this task force, we urge all healthcare providers who care for pregnant individuals to prioritize reporting all ARV exposures to the registry., Competing Interests: Potential conflicts of interest. W. R. S. is a consultant for ViiV and reports research support to his institution from Gilead Sciences. All other authors report no potential conflicts., (© The Author(s) 2024. Published by Oxford University Press on behalf of Infectious Diseases Society of America.)
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- 2024
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15. Deciphering bat influenza H18N11 infection dynamics in male Jamaican fruit bats on a single-cell level.
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Kessler S, Burke B, Andrieux G, Schinköthe J, Hamberger L, Kacza J, Zhan S, Reasoner C, Dutt TS, Kaukab Osman M, Henao-Tamayo M, Staniek J, Villena Ossa JF, Frank DT, Ma W, Ulrich R, Cathomen T, Boerries M, Rizzi M, Beer M, Schwemmle M, Reuther P, Schountz T, and Ciminski K
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- Animals, Male, Humans, Macrophages immunology, Macrophages virology, Influenza A virus genetics, Influenza A virus immunology, Gene Expression Profiling, Chiroptera virology, Chiroptera immunology, Chiroptera genetics, Single-Cell Analysis, Orthomyxoviridae Infections virology, Orthomyxoviridae Infections immunology, Orthomyxoviridae Infections veterinary
- Abstract
Jamaican fruit bats (Artibeus jamaicensis) naturally harbor a wide range of viruses of human relevance. These infections are typically mild in bats, suggesting unique features of their immune system. To better understand the immune response to viral infections in bats, we infected male Jamaican fruit bats with the bat-derived influenza A virus (IAV) H18N11. Using comparative single-cell RNA sequencing, we generated single-cell atlases of the Jamaican fruit bat intestine and mesentery. Gene expression profiling showed that H18N11 infection resulted in a moderate induction of interferon-stimulated genes and transcriptional activation of immune cells. H18N11 infection was predominant in various leukocytes, including macrophages, B cells, and NK/T cells. Confirming these findings, human leukocytes, particularly macrophages, were also susceptible to H18N11, highlighting the zoonotic potential of this bat-derived IAV. Our study provides insight into a natural virus-host relationship and thus serves as a fundamental resource for future in-depth characterization of bat immunology., (© 2024. The Author(s).)
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- 2024
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16. Have a Little Faith: Overcoming Pandemic-Related Challenges to Designing and Implementing a COVID-19 Testing Trial in African American Churches.
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Berkley-Patton J, Thompson CB, Templeton T, Finocchario-Kessler S, Williams E, Wainright C, Materia FT, Dennis L, Catley D, Burgin T, Derose KP, Bradley-Ewing A, Geyer A, Ellison SR, and Allsworth JE
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- Humans, Pandemics, SARS-CoV-2, Religion, Black or African American, COVID-19 prevention & control, COVID-19 epidemiology, COVID-19 Testing
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- 2024
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17. Communities organizing to promote equity: engaging local communities in public health responses to health inequities exacerbated by COVID-19-protocol paper.
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Pacheco CM, Bridges KM, Ellerbeck EF, Ablah E, Greiner KA, Chen Y, Collie-Akers V, Ramírez M, LeMaster JW, Sykes K, Parente DJ, Corriveau E, Miras Neira A, Scott A, Knapp KE, Woodward J, and Finocchario-Kessler S
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- Humans, Kansas, SARS-CoV-2, Health Status Disparities, Community Health Workers, COVID-19, Health Equity, Public Health
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Background: The COVID-19 pandemic has disproportionately impacted rural and under-resourced urban communities in Kansas. The state's response to COVID-19 has relied on a highly decentralized and underfunded public health system, with 100 local health departments in the state, few of which had prior experience engaging local community coalitions in a coordinated response to a public health crisis., Methods: To improve the capacity for local community-driven responses to COVID-19 and other public health needs, the University of Kansas Medical Center, in partnership with the Kansas Department of Health and Environment, will launch Communities Organizing to Promote Equity (COPE) in 20 counties across Kansas. COPE will establish Local Health Equity Action Teams (LHEATs), coalitions comprised of community members and service providers, who work with COPE-hired community health workers (CHWs) recruited to represent the diversity of the communities they serve. CHWs in each county are tasked with addressing unmet social needs of residents and supporting their county's LHEAT. LHEATs are charged with implementing strategies to improve social determinants of health in their county. Monthly, LHEATs and CHWs from all 20 counties will come together as part of a learning collaborative to share strategies, foster innovation, and engage in peer problem-solving. These efforts will be supported by a multilevel communications strategy that will increase awareness of COPE activities and resources at the local level and successes across the state. Our mixed methods evaluation design will assess the processes and impact of COPE activities as well as barriers and facilitators to implementation using aspects of both the Consolidated Framework for Implementation Research (CFIR) and Reach, Effectiveness, Adoption, Implementation and Maintenance (RE-AIM) models., Discussion: This protocol is designed to expand community capacity to strategically partner with local public health and social service partners to prioritize and implement health equity efforts. COPE intentionally engages historically resilient communities and those living in underserved rural areas to inform pragmatic strategies to improve health equity., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Pacheco, Bridges, Ellerbeck, Ablah, Greiner, Chen, Collie-Akers, Ramírez, LeMaster, Sykes, Parente, Corriveau, Miras Neira, Scott, Knapp, Finocchario-Kessler and COPE Team.)
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- 2024
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18. A Novel Electronic Record System for Documentation and Efficient Workflow for Community Health Workers: Development and Usability Study.
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Acharya H, Sykes KJ, Neira TM, Scott A, Pacheco CM, Sanner M, Ablah E, Oyowe K, Ellerbeck EF, Greiner KA, Corriveau EA, and Finocchario-Kessler S
- Abstract
Background: The COVID-19 pandemic added to the decades of evidence that public health institutions are routinely stretched beyond their capacity. Community health workers (CHWs) can be a crucial extension of public health resources to address health inequities, but systems to document CHW efforts are often fragmented and prone to unneeded redundancy, errors, and inefficiency., Objective: We sought to develop a more efficient data collection system for recording the wide range of community-based efforts performed by CHWs., Methods: The Communities Organizing to Promote Equity (COPE) project is an initiative to address health disparities across Kansas, in part, through the deployment of CHWs. Our team iteratively designed and refined the features of a novel data collection system for CHWs. Pilot tests with CHWs occurred over several months to ensure that the functionality supported their daily use. Following implementation of the database, procedures were set to sustain the collection of feedback from CHWs, community partners, and organizations with similar systems to continually modify the database to meet the needs of users. A continuous quality improvement process was conducted monthly to evaluate CHW performance; feedback was exchanged at team and individual levels regarding the continuous quality improvement results and opportunities for improvement. Further, a 15-item feedback survey was distributed to all 33 COPE CHWs and supervisors for assessing the feasibility of database features, accessibility, and overall satisfaction., Results: At launch, the database had 60 active users in 20 counties. Documented client interactions begin with needs assessments (modified versions of the Arizona Self-sufficiency Matrix and PRAPARE [Protocol for Responding to and Assessing Patient Assets, Risks, and Experiences]) and continue with the longitudinal tracking of progress toward goals. A user-specific automated alerts-based dashboard displays clients needing follow-up and upcoming events. The database contains over 55,000 documented encounters across more than 5079 clients. Available resources from over 2500 community organizations have been documented. Survey data indicated that 84% (27/32) of the respondents considered the overall navigation of the database as very easy. The majority of the respondents indicated they were overall very satisfied (14/32, 44%) or satisfied (15/32, 48%) with the database. Open-ended responses indicated the database features, documentation of community organizations and visual confirmation of consent form and data storage on a Health Insurance Portability and Accountability Act-compliant record system, improved client engagement, enrollment processes, and identification of resources., Conclusions: Our database extends beyond conventional electronic medical records and provides flexibility for ever-changing needs. The COPE database provides real-world data on CHW accomplishments, thereby improving the uniformity of data collection to enhance monitoring and evaluation. This database can serve as a model for community-based documentation systems and be adapted for use in other community settings., (©Harshdeep Acharya, Kevin J Sykes, Ton Mirás Neira, Angela Scott, Christina M Pacheco, Matthew Sanner, Elizabeth Ablah, Kevin Oyowe, Edward F Ellerbeck, K Allen Greiner, Erin A Corriveau, Sarah Finocchario-Kessler. Originally published in JMIR Formative Research (https://formative.jmir.org), 01.04.2024.)
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- 2024
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19. Intergenerational Transmission of Human Parenting Styles to Human-Dog Relationships.
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Kuo CH and Kessler S
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Parenting style and intergenerational transmission have been extensively studied in parent-child relationships. As dogs are increasingly recognized as integral members of the family system, there is a growing interest in understanding how parenting behaviors directed towards dogs can also influence a dog's behaviors. However, the reasons why people adopt certain parenting behaviors towards dogs remain relatively unknown. This study delved into the intergenerational transmission of parenting styles from one's upbringing to caregiving for dogs. Using a mixed methods approach with 391 dog caregivers and 10 interviews, this study employed multivariate linear regression and thematic analysis. Permissive parenting exhibited an intergenerational effect, with those experiencing it being more likely to replicate the style with their dogs. Orientation towards dogs emerged as a crucial mediator, with protectionistic attitudes reducing the likelihood of replicating authoritarian parenting. Humanistic and protectionistic orientation increased the likelihood of compensatory permissive behaviors. Insights from interviews underscored the impact of perceived childhood experiences on adopting specific parenting behaviors. Ultimately, this study provides valuable insights that can contribute to the promotion of appropriate caregiving behaviors toward dogs. By drawing on our understanding of child-parent relationships, addressing the underlying elements of human-dog dynamics may lead to positive outcomes both for dogs and their caregivers.
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- 2024
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20. Vanishing Lung Syndrome: A Case Report and Systematic Review of the Literature.
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Mansour M, Kessler S, Khreisat A, Morton J, and Berghea R
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Vanishing lung syndrome (VLS), also known as idiopathic giant bullous emphysema, is defined by the emergence of sizable bullae causing compression on healthy lung tissue. The elusive etiology of VLS mandates a diagnosis based on radiographic evidence showcasing giant bullae occupying at least one-third of the hemithorax in one or both lungs. This report presents a case of VLS in a 36-year-old female smoker devoid of any prior medical history. Additionally, we conducted a systematic review to discern the demographics, risk factors, and treatment modalities for individuals diagnosed with VLS., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2024, Mansour et al.)
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- 2024
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21. Challenges with pediatric antiretroviral therapy administration: Qualitative perspectives from caregivers and HIV providers in Kenya.
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Sliefert M, Maloba M, Wexler C, Were F, Mbithi Y, Mugendi G, Maliski E, Nicolay Z, Thomas G, Kale S, Maosa N, and Finocchario-Kessler S
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- Infant, Humans, Child, Kenya, Health Personnel, Records, Caregivers, Quality of Life
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Background: Current formulations of pediatric antiretroviral therapy (ART) for children with HIV present significant barriers to adherence, leading to drug resistance, ART ineffectiveness, and preventable child morbidity and mortality. Understanding these challenges and how they contribute to suboptimal adherence is an important step in improving outcomes. This qualitative study describes how regimen-related challenges create barriers to adherence and impact families., Methods: We conducted key informant interviews (KIIs) with 30 healthcare providers and 9 focus group discussions (FGDs) with a total of 72 caregivers, across three public hospitals in Siaya and Mombasa Kenya. The KIIs and FGDs were audio recorded, translated, and transcribed verbatim. The transcripts were hand coded based on emergent and a-priori themes., Results: Caregivers discussed major regimen-related challenges to adherence included poor palatability of current formulations, complex preparation, and administration (including measuring, crushing, dissolving, mixing), complex drug storage, and frequent refill appointments and how these regimen-related challenges contributed to individual and intrapersonal barriers to adherence. Caregivers discussed how poor taste led to child anxiety, refusal of medications, and the need for caregivers to use bribes or threats during administration. Complex preparation led to concerns and challenges about maintaining privacy and confidentiality, especially during times of travel. Providers corroborated this patient experience and described how these challenges with administration led to poor infant outcomes, including high viral load and preventable morbidity. Providers discussed how the frequency of refills could range from every 2 weeks to every 3 months, depending on the patient. Caregivers discussed how these refill frequencies interrupted work and school schedules, risked unwanted disclosure to peers, required use of financial resources for travel, and ultimately were a challenge to adherence., Conclusion: These findings highlight the need for improved formulations for pediatric ART to ease the daily burden on caregivers and children to increase adherence, improve child health, and overall quality of life of families., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Sliefert et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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22. Assessing COVID-related concerns and their impact on antenatal and delivery care among pregnant women living with HIV in Kenya: a brief report.
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Wexler C, Maloba M, Mokua S, Babu S, Maosa N, Staggs V, Goggin K, Acharya H, Hurley EA, and Finocchario-Kessler S
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- Pregnancy, Child, Humans, Female, Kenya epidemiology, Infectious Disease Transmission, Vertical prevention & control, Pregnant Women, COVID-19 prevention & control, Maternal Health Services, HIV Infections epidemiology
- Abstract
Background: Some studies indicate that pregnant Kenyan women were concerned about Coronavirus disease 2019 (COVID-19) exposure during maternity care. We assessed concern regarding COVID-19 exposure and any impact on antenatal care (ANC) enrollment and/or hospital delivery among pregnant women living with human immunodeficiency virus (HIV) in Kenya., Methods: Data were collected from 1,478 pregnant women living with HIV enrolled in prevention of mother to child transmission of HIV (PMTCT) care at 12 Kenyan hospitals from October 2020 to July 2022. Surveys were conducted when women first presented for PMTCT services at the study hospital and asked demographic questions as well as items related to concerns about COVID-19. A 5-point Likert scale (strongly disagree to strongly agree) assessed concerns about COVID-19 exposure and travel challenges. Gestational age at PMTCT enrollment, number of ANC appointments attended, and delivery location were compared among women who expressed COVID-19 concerns and those who did not., Results: Few women reported delaying antenatal care (4.7%), attending fewer antenatal care appointments (5.0%), or having concerns about a hospital-based delivery (7.7%) because of COVID-19. More (25.8%) reported travel challenges because of COVID-19. There were no significant differences in gestational age at enrollment, number of ANC appointments, or rates of hospital-based delivery between women with concerns about COVID-19 and those without, CONCLUSION: Few pregnant women living with HIV expressed concerns about COVID-19 exposure in the context of routine ANC or delivery care. Women with and without concerns had similar care seeking behaviors. The recognized importance of routine ANC care and facility-based deliveries may have contributed to these positive pregnancy indicators, even among women who worried about COVID-19 exposure., Trial Registration: www., Clinicaltrials: gov identifier NCT04571684., (© 2024. The Author(s).)
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- 2024
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23. Reverse Genetics of Bat Influenza A Viruses.
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Kessler S, García-Sastre A, Schwemmle M, and Ciminski K
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- Animals, Mice, Reverse Genetics, Ferrets genetics, Influenza A virus genetics, Chiroptera, Orthomyxoviridae Infections
- Abstract
New World fruit bats were recently found to harbor two distinct and previously unknown influenza A viruses (IAVs) of the subtypes H17N10 and H18N11. Although viral genome sequences were detected in the liver, intestine, lung, and kidney of infected bats and the complete genome sequences have been isolated from their rectal swab samples, all attempts to isolate an infectious virus from bats in nature have failed. The lack of an infectious bat IAV isolate was overcome by reverse genetic approaches that led to the generation of an infectious virus in vitro. Using such synthetic bat IAVs enabled the identification of their unconventional cell entry via major histocompatibility complex II (MCH-II) molecules and their ability to replicate in mice, ferrets, and bats. Importantly, we also showed that these synthetic recombinant bat IAVs are not able to reassort with conventional IAVs, preventing the acquisition of enhanced transmission properties in non-bat species by reassortment with conventional IAVs. As authentic viruses are key for understanding the molecular biology of bat IAVs, in this chapter, we describe our recently established reverse genetics protocol for generating H17N10 and H18N11 in vitro. This step-by-step protocol starts with cloning of cDNA copies of the viral RNA segments into reverse genetics plasmids, followed by the generation of a highly concentrated stock and finally a method to determine viral titers., (© 2024. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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24. Synthesis and Evaluation of Novel Substituted N-Aryl 1,4-Dihydropyridines as Antituberculostatic Agents.
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Seitz L, Reiling N, Vorreiter C, Sippl W, Kessler S, and Hilgeroth A
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- Antitubercular Agents, Structure-Activity Relationship, Microbial Sensitivity Tests, Mycobacterium tuberculosis, Dihydropyridines
- Abstract
Background: Tuberculosis has been the main cause of mortality of infectious diseases worldwide, with strongly limited therapeutic options. With increasing resistance and missing suitable drugs in those cases, there is a strong need for novel antituberculostatic drugs. We developed novel N-aryl 1,4-dihydropyridines with various substitution patterns to evaluate them as antituberculostatic agents., Methods: 1,4-Dihydropyridine derivatives were synthesized and purified by column chromatography or recrystallization. The mycobacterial growth inhibition was determined in a fluorescent mycobacterial growth assay., Results: The compounds were prepared in a simple one-pot reaction under acidic conditions with structurally varied components. The substituent effects on the determined mycobacterial growth inhibitory properties are discussed., Conclusion: Lipophilic diester substituted derivatives show promising activities that were additionally affected by the aromatic substituent functions. Thus, we identified compounds with activities almost reaching that of the used antimycobacterial drug as control., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
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- 2024
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