Individual vital rates, such as mortality and birth rates, are key determinants of lifetime reproductive success, and variability in these rates shapes population dynamics. Previous studies have found that this vital rate heterogeneity can influence demographic properties, including population growth rates. However, the explicit effects of the variation within and the covariance between vital rates that can also vary throughout the lifespan on population growth remain unknown.
View Article and Find Full Text PDFBackground: Tebufenozide is widely used to control populations of the smaller tea tortrix, Adoxophyes honmai. However, A. honmai has evolved resistance such that straightforward pesticide application is an untenable long-term approach for population control.
View Article and Find Full Text PDFParasitoids are small insects, (e.g., small wasps or flies) that reproduce by laying eggs on or within host arthropods.
View Article and Find Full Text PDFThe role of power in healthcare can raise many ethical challenges. Power is ownership, whether given, ceded, or taken of another person's autonomy. When a person has power over someone else, they can control or strongly influence the decision-making freedom of that person.
View Article and Find Full Text PDFImplementation of a systematic program for galactic cosmic radiation (GCR) countermeasure discovery will require convenient access to ground-based space radiation analogs. The current gold standard approach for GCR simulation is to use a particle accelerator for sequential irradiation with ion beams representing different GCR components. This has limitations, particularly for studies of non-acute responses, strategies that require robotic instrumentation, or implementation of complex in vitro models that are emerging as alternatives to animal experimentation.
View Article and Find Full Text PDFAmong-individual variation in vital rates, such as mortality and birth rates, exists in nearly all populations. Recent studies suggest that this individual heterogeneity produces substantial life-history and fitness differences among individuals, which in turn scale up to influence population dynamics. However, our ability to understand the consequences of individual heterogeneity is limited by inconsistencies across conceptual frameworks in the field.
View Article and Find Full Text PDFEcotoxicol Environ Saf
September 2021
Insecticides are extensively used worldwide to kill insect pests, yet organisms are most often exposed to insecticides at sublethal concentrations. Our understanding of sublethal effects on life histories is needed to predict the impact of insecticides on population dynamics and improve insecticide use and pest control. Sublethal concentrations can impact life histories directly and indirectly through changes in the intraspecific competition.
View Article and Find Full Text PDFThe success of a health care institution-as defined by delivering high-quality, high-value care, positive patient outcomes, and financial solvency-is inextricably tied to the culture within that organization. The ability to achieve and sustain alignment between its mission, values, and everyday practices defines a positive organizational culture. An institution that has a diminished organizational culture, reflected in the failure to consistently align management and clinical decisions and practices with its mission and values, will struggle.
View Article and Find Full Text PDFIt is a long-standing challenge to understand how changes in food resources impact consumer life history traits and, in turn, impact how organisms interact with their environment. To characterize food quality effects on life history, most studies follow organisms throughout their life cycle and quantify major life events, such as age at maturity or fecundity. From these studies, we know that food quality generally impacts body size, juvenile development, and life span.
View Article and Find Full Text PDFWe present the case of a 2-year-old boy with epidermolysis bullosa and supraglottic stenosis whose parents refuse an elective tracheostomy because of the significant care the tracheostomy would require. The patient's family lives in a rural area with few health care resources and his parents are already handling hours of daily skin care for his epidermolysis bullosa. In an attempt to convince the parents to pursue the intervention, the medical team recommends that the family move to an area with additional resources to assist in the child's care.
View Article and Find Full Text PDFEvol Med Public Health
June 2018
The rate of evolution of drug resistance depends on the fitness of resistant pathogens. The fitness of resistant pathogens is reduced by competition with sensitive pathogens in untreated hosts and so enhanced by competitive release in drug-treated hosts. We set out to estimate the magnitude of those effects on a variety of fitness measures, hypothesizing that competitive suppression and competitive release would have larger impacts when resistance was rarer to begin with.
View Article and Find Full Text PDFHealth Care Manag (Frederick)
July 2018
Health care organizations have embraced the concept of patient-centered care, but there is concern that the mere inclusion of those words in mission and value statements does not equate to implementation at the health care delivery level. Despite initiatives to align the patient-clinician encounter with broader patient-centered values, there have been mixed results, often creating a gap between practice and the organization's stated position. This preliminary study aims to assess the extent to which patient-centered values are reflected in actual patient care.
View Article and Find Full Text PDFIndividual differences in genetics, age, or environment can cause tremendous differences in individual life-history traits. This individual heterogeneity generates demographic heterogeneity at the population level, which is predicted to have a strong impact on both ecological and evolutionary dynamics. However, we know surprisingly little about the sources of individual heterogeneity for particular taxa or how different sources scale up to impact ecological and evolutionary dynamics.
View Article and Find Full Text PDFTemperature is a key environmental driver of mosquito population dynamics; understanding its central role is important for these malaria vectors. Mosquito population responses to temperature fluctuations, though important across the life history, are poorly understood at a population level. We used stage-structured, temperature-dependent delay-differential equations to conduct a detailed exploration of the impacts of diurnal and annual temperature fluctuations on mosquito population dynamics.
View Article and Find Full Text PDFJ Healthc Manag
October 2017
This study of Pioneer accountable care organizations (ACOs) suggests that the ACO model is creating moral distress for physicians and business leaders in seven critical ways:Despite an overall sense of optimism associated with the ACO model, our research identified an underlying sense of moral distress at most sites. A clear opportunity exists for ACOs to use a more comprehensive, coordinated approach to proactively resolving ethical dilemmas while continuing the march toward risk-based contracts.
View Article and Find Full Text PDFSince its publication in 2008, SQUIRE (Standards for Quality Improvement Reporting Excellence) has contributed to the completeness and transparency of reporting of quality improvement work, providing guidance to authors and reviewers of reports on healthcare improvement work. In the interim, enormous growth has occurred in understanding factors that influence the success, and failure, of healthcare improvement efforts. Progress has been particularly strong in three areas: the understanding of the theoretical basis for improvement work; the impact of contextual factors on outcomes; and the development of methodologies for studying improvement work.
View Article and Find Full Text PDFBackground: Malaria-infected mosquitoes have been reported to be more likely to take a blood meal when parasites are infectious than when non-infectious. This change in feeding behavior increases the likelihood of malaria transmission, and has been considered an example of parasite manipulation of host behavior. However, immune challenge with heat-killed Escherichia coli induces the same behavior, suggesting that altered feeding behavior may be driven by adaptive responses of hosts to cope with an immune response, rather than by parasite-specific factors.
View Article and Find Full Text PDFThe ethical standard for informed consent is fostered within a shared decision-making (SDM) process. SDM has become a recognized and needed approach in health care decision-making. Based on an ethical foundation, the approach fosters the active engagement of patients, where the clinician presents evidence-based treatment information and options and openly elicits the patient's values and preferences.
View Article and Find Full Text PDFIn 2012, dozens of patients of Exeter Hospital in New Hampshire contracted new hepatitis C infections that were tracked back to a cardiac technician who ultimately confessed to drug diversion. A multistate epidemiological investigation of hepatitis C cases occurring in multiple hospitals revealed that the technician had been fired from prior institutions due to similar drug diversion activity, about which Exeter Hospital had not been notified. In this article, we highlight the institutional ethical issues raised by this outbreak, and propose a national centralized reporting system to support institutional fulfillment of the ethical obligation to protect the health of patients by preventing such nosocomial outbreaks.
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