Agricultural land use shapes dispersal in white-tailed deer (Odocoileus virginianus).

BACKGROUND: Dispersal is a fundamental process to animal population dynamics and gene flow. In white-tailed deer (WTD; Odocoileus virginianus), dispersal also presents an increasingly relevant risk for the spread of infectious diseases. Across their wide range, WTD dispersal is believed to be driven by a suite of landscape and host behavioral factors, but these can vary by region, season, and sex. Our objectives were to (1) identify dispersal events in Wisconsin WTD and determine drivers of dispersal rates and distances, and (2) determine how landscape features (e.g., rivers, roads) structure deer dispersal paths. METHODS: We developed an algorithmic approach to detect dispersal events from GPS collar data for 590 juvenile, yearling, and adult WTD. We used statistical models to identify host and landscape drivers of dispersal rates and distances, including the role of agricultural land use, the traversability of the landscape, and potential interactions between deer. We then performed a step selection analysis to determine how landscape features such as agricultural land use, elevation, rivers, and roads affected deer dispersal paths. RESULTS: Dispersal predominantly occurred in juvenile males, of which 64.2% dispersed, with dispersal events uncommon in other sex and age classes. Juvenile male dispersal probability was positively associated with the proportion of the natal range that was classified as agricultural land use, but only during the spring. Dispersal distances were typically short (median 5.77 km, range: 1.3-68.3 km), especially in the fall. Further, dispersal distances were positively associated with agricultural land use in potential dispersal paths but negatively associated with the number of proximate deer in the natal range. Lastly, we found that, during dispersal, juvenile males typically avoided agricultural land use but selected for areas near rivers and streams. CONCLUSION: Land use-particularly agricultural-was a key driver of dispersal rates, distances, and paths in Wisconsin WTD. In addition, our results support the importance of deer social environments in shaping dispersal behavior. Our findings reinforce knowledge of dispersal ecology in WTD and how landscape factors-including major rivers, roads, and land-use patterns-structure host gene flow and potential pathogen transmission.

Accelerated 3-Year MD Pathway Programs: Graduates' Perspectives on Education Quality, the Learning Environment, Residency Readiness, Debt, Burnout, and Career Plans.

PURPOSE: To compare perception of accelerated and traditional medical students, with respect to satisfaction with education quality, and the learning environment, residency readiness, burnout, debt, and career plans. METHOD: Customized 2017 and 2018 Medical School Graduation Questionnaires (GQs) were analyzed using independent samples t tests for means and chi-square tests for percentages, comparing responses of accelerated MD program graduates (accelerated pathway [AP] students) from 9 schools with those of non-AP graduates from the same 9 schools and non-AP graduates from all surveyed schools. RESULTS: GQ completion rates for the 90 AP students, 2,573 non-AP students from AP schools, and 38,116 non-AP students from all schools in 2017 and 2018 were 74.4%, 82.3%, and 83.3%, respectively. AP students were as satisfied with the quality of their education and felt as prepared for residency as non-AP students. AP students reported a more positive learning climate than non-AP students from AP schools and from all schools as measured by the student-faculty interaction (15.9 vs 14.4 and 14.3, respectively; P < .001 for both pairwise comparisons) and emotional climate (10.7 vs 9.6 and 9.6, respectively; P = .004 and .003, respectively) scales. AP students had less debt than non-AP students (P < .001), and more planned to care for underserved populations and practice family medicine than non-AP students from AP schools (55.7% vs 33.9% and 37.7% vs 9.4%; P = .002 and < .001, respectively). Family expectations were a more common influence on career plans for AP students than for non-AP students from AP schools and from all schools (26.2% vs 11.3% and 11.7%, respectively; P < .001 for both pairwise comparisons). CONCLUSIONS: These findings support accelerated programs as a potentially important intervention to address workforce shortages and rising student debt without negative impacts on student perception of burnout, education quality, or residency preparedness.

CAUSE OF DEATH, PATHOLOGY, AND CHRONIC WASTING DISEASE STATUS OF WHITE-TAILED DEER (ODOCOILEUS VIRGINIANUS) MORTALITIES IN WISCONSIN, USA.

White-tailed deer (WTD; Odocoileus virginianus) are a critical species for ecosystem function and wildlife management. As such, studies of cause-specific mortality among WTD have long been used to understand population dynamics. However, detailed pathological information is rarely documented for free-ranging WTD, especially in regions with a high prevalence of chronic wasting disease (CWD). This leaves a significant gap in understanding how CWD is associated with disease processes or comorbidities that may subsequently alter broader population dynamics. We investigated unknown mortalities among collared WTD in southwestern Wisconsin, USA, an area of high CWD prevalence. We tested for associations between CWD and other disease processes and used a network approach to test for co-occurring disease processes. Predation and infectious disease were leading suspected causes of death, with high prevalence of CWD (42.4%; of 245 evaluated) and pneumonia (51.2%; of 168 evaluated) in our sample. CWD prevalence increased with age, before decreasing among older individuals, with more older females than males in our sample. Females were more likely to be CWD positive, and although this was not statistically significant when accounting for age, females were significantly more likely to die with end-stage CWD than males and may consequently be an underrecognized source of CWD transmission. Presence of CWD was associated with emaciation, atrophy of marrow fat and hematopoietic cells, and ectoparasitism (lice and ticks). Occurrences of severe infectious disease processes clustered together (e.g., pneumonia, CWD), as compared to noninfectious or low-severity processes (e.g., sarcocystosis), although pneumonia cases were not fully explained by CWD status. With the prevalence of CWD increasing across North America, our results highlight the critical importance of understanding the potential role of CWD in favoring or maintaining disease processes of importance for deer population health and dynamics.

A national view of rural health workforce issues in the USA.

INTRODUCTION: Regional or state studies in the USA have documented shortages of rural physicians and other healthcare professionals that can impact on access to health services. The purpose of this study was to determine whether rural hospital chief executive officers (CEOs) in the USA report shortages of health professions and to obtain perceptions about factors influencing recruiting and retention. METHODS: A nationwide US survey was conducted of 1031 rural hospital CEOs identified by regional/state Area Health Education Centers. A three-page survey was sent containing questions about whether or not physician shortages were present in the CEO's community and asking about physician needs by specialty. The CEOs were also asked to assess whether other health professionals were needed in their town or within a 48 km (30 mile) radius. Analyses from 335 respondents (34.4%) representative of rural hospital CEOs in the USA are presented. RESULTS: Primary care shortages based on survey responses were very similar to the pattern for all rural areas in the USA (49% vs 52%, respectively). The location of respondents according to ZIP code rurality status was similar to all rural areas in the USA (moderately rural, 29.3% vs 27.6%, respectively), and 69.1% were located in highly rural ZIP codes (vs 72.4% of highly rural ZIP codes for all USA). Physician shortages were reported by 75.4% of the rural CEOs, and 70.3% indicated shortages of two or more primary care specialties. The most frequently reported shortage was family medicine (FM, 58.3%) followed by general internal medicine (IM, 53.1%). Other reported shortages were: psychiatry (46.6%); general surgery (39.9%); neurology (36.4%); pediatrics (PEDS, 36.2%); cardiology (35%); and obstetrics-gynecology (34.4%). The three most commonly needed allied health professions were registered nurses (73.5%), physical therapists (61.2%) and pharmacists (51%). The percentage of CEOs reporting shortages of two or more primary care specialties (FM, IM or PEDS) was 70.3% nationally, with no statistically significant regional variation (p = .394), while higher for the New England through Virginia region (83.9%) than for all other regions. The CEOs reported the highest specialty care shortages for psychiatry (46.6%) followed by general surgery (39.9%), neurology (36.4%), cardiology (35.0%) and obstetrics-gynecology (34.4%). Major specialty shortages varied among regions and only for neurology and cardiology were regional differences statistically significant (p < .05). Marked variation between need for healthcare professionals were reported ranging from approximately 73% for registered nurses (RNs) to 16% for health educators. Reporting of need for RNs in rural areas was nearly 74% nationally and 35% reported a need for nurse practitioners. Differences for both RNs and nurse practitioners were not statistically significant among regions. Nationally, approximately 30% of CEOs reported a shortage of licensed practical nurses, which differed significantly among regions (p = .006). There was variation in physical therapist shortages among regions (p = .001), with 61.2% of CEOs reporting shortages nationally. Regional variation pattern was observed for pharmacists (p = .004) with approximately 50% of rural CEOs reporting a need for pharmacists nationally. The association between CEOs' reported shortages of two or more primary care doctors and their indication of the need for other health professionals was statistically significant for nurse practitioners, physician assistants, pharmacists, and dentists. The recruitment and retention attributes deemed to be of greatest importance were: (1) healthcare is a major part of the local economy; (2) community is a good place for family; (3) doctors are well-respected and supported; and (4) people in the community are friendly and supportive of each other. These were remarkably similar across 6 US geographic regions. CONCLUSIONS: Similarities in shortages and attributes influencing recruitment across regions suggest that major policy and program interventions are needed to develop a rural health professions workforce that will enable the benefits of recent US health reform insurance coverage to be realized. Substantial and targeted programs to increase rural healthcare professionals are needed.

Differential MicroRNA Expression of miR-21 and miR-155 within Oral Cancer Extracellular Vesicles in Response to Melatonin.

OBJECTIVE: Extracellular vesicles derived from oral cancer cells, which include Exosomes and Oncosomes, are membranous vesicles secreted into the surrounding extracellular environment. These extracellular vesicles can regulate and modulate oral squamous cell carcinoma (OSCC) progression through the horizontal transfer of bioactive molecules including proteins, lipids and microRNA (miRNA). The primary objective of this study was to examine the potential to isolate and evaluate extracellular vesicles (including exosomes) from various oral cancer cell lines and to explore potential differences in miRNA content. METHODS: The OSCC cell lines SCC9, SCC25 and CAL27 were cultured in DMEM containing 10% exosome-free fetal bovine serum. Cell-culture conditioned media was collected for exosome and extracellular vesicle isolation after 72 hours. Isolation was completed using the Total Exosome Isolation reagent (Invitrogen) and extracellular vesicle RNA was purified using the Total Exosome RNA isolation kit (Invitrogen). Extracellular vesicle miRNA content was evaluated using primers specific for miR-16, -21, -133a and -155. RESULTS: Extracellular vesicles were successfully isolated from all three OSCC cell lines and total extracellular vesicle RNA was isolated. Molecular screening using primers specific for several miRNA revealed differential baseline expression among the different cell lines. The addition of melatonin significantly reduced the expression of miR-155 in all of the OSCC extracellular vesicles. However, miR-21 was significantly increased in each of the three OSCC isolates. No significant changes in miR-133a expression were observed under melatonin administration. CONCLUSIONS: Although many studies have documented changes in gene expression among various cancers under melatonin administration, few studies have evaluated these effects on microRNAs. These results may be among the first to evaluate the effects of melatonin on microRNA expression in oral cancers, which suggests the differential modulation of specific microRNAs, such as miR-21, miR-133a and miR-155, may be of significant importance when evaluating the mechanisms and pathways involved in melatonin-associated anti-tumor effects.

Three-Year MD Programs: Perspectives From the Consortium of Accelerated Medical Pathway Programs (CAMPP).

In the last decade, there has been renewed interest in three-year MD pathway programs. In 2015, with support from the Josiah Macy Jr., Foundation, eight North American medical schools with three-year accelerated medical pathway programs formed the Consortium of Accelerated Medical Pathway Programs (CAMPP). The schools are two campuses of the Medical College of Wisconsin; McMaster University Michael G. DeGroote School of Medicine; Mercer University School of Medicine; New York University School of Medicine; Penn State College of Medicine; Texas Tech University Health Sciences Center School of Medicine; University of California, Davis School of Medicine; and University of Louisville School of Medicine. These programs vary in size and medical specialty focus but all include the reduction of student debt from savings in tuition costs. Each school's mission to create a three-year pathway program differs; common themes include the ability to train physicians to practice in underserved areas or to allow students for whom the choice of specialty is known to progress more quickly. Compared with McMaster, these programs are small, but most capitalize on training and assessing competency across the undergraduate medical education-graduate medical education continuum and include conditional acceptance into an affiliated residency program. This article includes an overview of each CAMPP school with attention to admissions, curriculum, financial support, and regulatory challenges associated with the design of an accelerated pathway program. These programs are relatively new, with a small number of graduates; this article outlines opportunities and challenges for schools considering the development of accelerated programs.

A decade of rural physician workforce outcomes for the Rockford Rural Medical Education (RMED) Program, University of Illinois.

PURPOSE: To report on the retention and practice outcomes of the University of Illinois College of Medicine at Rockford Rural Medical Education (RMED) Program and to examine distance from influential locations in relation to graduates' current practice location. METHOD: The RMED Program recruits candidates from rural backgrounds, provides a supplemental curriculum addressing rural topics and experiences, and tracks graduates' practice location and specialty choice outcomes. Practice location and specialty were compared for 160 RMED graduates and 2,663 non-RMED graduates, from 1997 to 2007. Rural status was based on rural-urban commuting codes. Comparisons were made using cross-tabulation with calculation of chi-square or odds ratios to assess differences. RESULTS: RMED graduates were 14.4 times more likely than non-RMED graduates to choose family medicine; 6.7 times more likely to choose a primary care practice specialty; 17.2 times more likely to be currently practicing in a rural location; and 12.8 times more likely to be currently practicing in a primary care shortage zip code. Analysis of current RMED graduates' practice locations indicates that 41.9% were within 90 miles of their fourth-year preceptorship community. Among RMED graduates practicing in Illinois, 62.1% and 73.3% were located within 60 and 90 miles, respectively, of their hometown. CONCLUSIONS: Recruitment of students combined with a rural-focused curriculum yielded positive outcomes related to primary care practice and decisions regarding practice location. RMED graduates were considerably more likely than non-RMED graduates to choose family medicine, choose a primary care specialty, and be currently practicing in a rural location.

Medical school rural programs: a comparison with international medical graduates in addressing state-level rural family physician and primary care supply.

PURPOSE: Comprehensive medical school rural programs (RPs) have made demonstrable contributions to the rural physician workforce, but their relative impact is uncertain. This study compares rural primary care practice outcomes for RP graduates within relevant states with those of international medical graduates (IMGs), also seen as ameliorating rural physician shortages. METHOD: Using data from the 2010 American Medical Association Physician Masterfile, the authors identified all 1,757 graduates from three RPs (Jefferson Medical College's Physician Shortage Area Program; University of Minnesota Medical School Duluth; University of Illinois College of Medicine at Rockford's Rural Medical Education Program) practicing in their respective states, and all 6,474 IMGs practicing in the same states and graduating the same years. The relative likelihoods of RP graduates versus IMGs practicing rural family medicine and rural primary care were compared. RESULTS: RP graduates were 10 times more likely to practice rural family medicine than IMGs (relative risk [RR] = 10.0, confidence interval [CI] 8.7-11.6, P < .001) and almost 4 times as likely to practice any rural primary care specialty (RR 3.8, CI 3.5-4.2, P < .001). Overall, RPs produced more rural family physicians than the IMG cohort (376 versus 254). CONCLUSIONS: Despite their relatively small size, RPs had a significant impact on rural family physician and primary care supply compared with the much larger cohort of IMGs. Wider adoption of the RP model would substantially increase access to care in rural areas compared with increasing reliance on IMGs or unfocused expansion of traditional medical schools.

A comprehensive medical education program response to rural primary care needs.

This article presents the characteristics and results of the Rural Medical Education (RMED) Program which addresses medical workforce needs focused on reducing rural health disparities. The program is comprehensive in implementing a system of recruitment of candidates from rural backgrounds, offering a rural-focused curriculum, and instituting evaluative components to track outcomes. Distinctive program features include a Recruitment and Retention Committee of rural community members; special rural-focused topics and events during the first three years of undergraduate medical education; and a required fourth-year, 16-week rural preceptorship through which students work with primary care physicians and conduct community-oriented primary care projects. Since 1993, 216 students have matriculated. More than three quarters of candidates interviewed received offers into the program (overall acceptance rate of 75%). Comparisons between RMED and all other students on composite MCAT scores and United States Medical Licensing Examination (USMLE) Part 1 scores show a slightly lower MCAT average for RMED students, but USMLE scores are equal to those of non-RMED students. To date, 159 students have graduated, with 76% entering primary care residencies; 103 are currently in practice, with 64.4% in primary care practice in small towns and/or rural communities. RMED Program outcomes compare favorably with those of other rural medical education programs. RMED can serve as a model at many levels, including recruitment, collaboration, curriculum, and retention. Future challenges for program development and disparity reduction include recruiting students from the growing number of rural minority populations, expanding the number of program slots, and integrating the program with other health professions to address the needs of rural populations.