Molecular Detection of Dengue Virus, Zika Virus, and Chikungunya Virus Arboviruses in Neotropical Bats.

Background: The dengue, Zika, and Chikungunya arboviruses have spread in America in the past year, thus becoming global health issues. These viruses are maintained in nature in two transmission cycles: an urban cycle, transmitted from hematophagous mosquitoes to humans, and a wild cycle, recorded only in Africa and Asia, involving mosquitoes and nonhuman primates as natural hosts. The evidence shows that these arboviruses infect other wild mammals in America, such as rodents, marsupials, and bats. This study aimed to determine the potential natural infection of arboviruses in bats captured in contrasting sites (tropical forests, urban areas, and caves) in Oaxaca, Mexico. Materials and Methods: Liver samples were collected from some bats and tested for RNA from dengue, Zika, and Chikungunya with the quantitative real-time PCR assay. We analyzed 162 samples that encompassed 23 bat species. Results: No natural infection with any of the three arboviruses was detected in any sample tested. Conclusion: The existence of a wild cycle of the three arboviruses in the American continent is not ruled out. However, owing to the low or zero prevalence recorded in other studies and the present study, bats are likely involved in the arbovirus transmission cycle as accidental hosts.

A Review of Mammarenaviruses and Rodent Reservoirs in the Americas.

In the Americas, infectious viral diseases caused by viruses of the genus Mammarenavirus have been reported since the 1960s. Such diseases have commonly been associated with land use changes, which favor abundance of generalist rodent species. In the Americas-where the rates of land use change are among the highest worldwide-at least 1326 of all 2277 known rodent species have been reported. We conducted a literature review of studies between 1960 and 2020, to establish the current and historical knowledge about genotypes of mammarenaviruses and their rodent reservoirs in the Americas. Our overall goal was to show the importance of focusing research efforts on the American continent, since the conditions exist for future viral hemorrhagic fever (VHF) outbreaks caused by rodent-borne viruses, in turn, carried by widely distributed rodents. We found 47 species identified down to the species level, and one species identified only down to the genus level (Oryzomys sp.), reported in the Americas as reservoirs of mammarenaviruses, most these are ecological generalists. These species associate with 29 genotypes of Mammarenavirus, seven of which have been linked to VHFs in humans. We also highlight the need to monitor these species, in order to prevent viral disease outbreaks in the region.

Experiences and needs of patients undergoing clinical isolation. Phenomenological-hermeneutic study.

OBJECTIVE: To know the experience lived by people subjected to hospital isolation, as well as to recognize the most significant needs expressed during this process. METHOD: Qualitative study from a phenomenological-hermeneutical approach. The study participants were patients subjected to hospital isolation during their admission to the trauma ward of the Vall d'Hebron University Hospital. Six in-depth interviews were conducted and recorded by audio. The data was analyzed using a thematic content analysis. RESULTS: The feedback from the participants in this study was essential to understand the experience lived by people subjected to hospital isolation. These perceptions were listed in the format of 5 categories related to the following experiences: loneliness, perception of "feeling like the last one", lack of communication, resilience and lack of attention and 3 categories related to their needs. CONCLUSIONS: The findings suggest that isolation requires compliance with a series of rules and restrictions in the hospital setting that, despite its therapeutic purposes, can promote negative feelings. Based on the results of our research, we conclude that an effort should be made to improve actions aimed at minimizing these feelings in situations of isolation.

Vivencias y necesidades de los pacientes sometidos a aislamiento clínico. Estudio fenomenológico-hermenéutico / Experiences and needs of patients undergoing clinical isolation. Phenomenological-hermeneutic study

Objetivo:Conocer la experiencia vivida de las personas sometidas a un aislamiento hospitalario, así como explorar las necesidades más significativas durante ese proceso.Método:Estudio cualitativo con enfoque fenomenológico-hermenéutico. Los participantes fueron pacientes sometidos a aislamiento hospitalario durante su ingreso en el Hospital de Traumatología de la Vall d’Hebron. Se realizaron 6 entrevistas en profundidad grabadas en audio. Los datos fueron analizados a través de un análisis de contenido temático.Resultados:Las interpretaciones de los participantes de este estudio fueron fundamentales para comprender la experiencia vivida de las personas sometidas a aislamiento hospitalario. Estas percepciones fueron capturadas en formato de 5 categorías para las experiencias: soledad, percepción de «sentirse el último», falta de comunicación, resiliencia y desatención y 3 categorías para las necesidades.Conclusiones:Los hallazgos sugieren que el aislamiento comporta una serie de normas y restricciones en el entorno hospitalario que a pesar de sus propósitos terapéuticos pueden favorecer sentimientos negativos. Debe fomentarse la búsqueda de acciones de mejora dirigidas a minimizar estos sentimientos frente al aislamiento.

Objetive:To know the experience lived by people subjected to hospital isolation, as well as to recognize the most significant needs expressed during this process.Method:Qualitative study from a phenomenological-hermeneutical approach. The study participants were patients subjected to hospital isolation during their admission to the trauma ward of the Vall d’Hebron University Hospital. Six in-depth interviews were conducted and recorded by audio. The data was analyzed using a thematic content analysis.Results:The feedback from the participants in this study was essential to understand the experience lived by people subjected to hospital isolation. These perceptions were listed in the format of 5 categories related to the following experiences: loneliness, perception of “feeling like the last one”, lack of communication, resilience and lack of attention and 3 categories related to their needs.Conclusions:The findings suggest that isolation requires compliance with a series of rules and restrictions in the hospital setting that, despite its therapeutic purposes, can promote negative feelings. Based on the results of our research, we conclude that an effort should be made to improve actions aimed at minimizing these feelings in situations of isolation.

Efectividad de una intervención para reducir las interrupciones durante la preparación y administración de medicación / Efficacy of an intervention to reduce interruptions during the preparation and administration of medication

Objetivo: analizar la efectividad de la implementación del programa multi-intervención Programa Interrupciones Zero (PIZ) para disminuir las interrupciones durante el proceso de preparación y administración de medicamentos (PPAM) en el ámbito hospitalario y aumentar la satisfacción de los profesionales de Enfermería.Método: analítico cuasi-experimental pre-post intervención de grupo único en una unidad de cirugía traumatológica hospitalaria. Se recogieron datos sociodemográficos y profesionales de los participantes, número de interrupciones autorreferido según la persona origen de la interrupción, otros motivos y turno laboral en la que se produjeron, y variables de percepción del tiempo dedicado al PPAM y satistacción respecto al proceso. Se llevó a cabo un análisis descriptivo y una comparación de proporciones pre-post a los dos meses con la prueba t para muestras apareadas considerando una p< 0,05 como estadísticamente significativa.Resultados: participaron 23 enfermeras y siete enfermeros. Se registraron 839 interrupciones antes del PIZ y 484 tras él. Las personas que más interrupciones generaron fueron los técnicos en curas auxiliares de Enfermería (24,3% pre y 22,7% post) y los principales motivos no originados por personas fueron los relacionados con el tratamiento (24,3% y 22,2% respectivamente) (p> 0,05). La reducción de interrupciones fue significativa en el turno de día disminuyendo un 51,3% (p< 0,01) y en el turno de noche disminuyendo un 22,8% (p= 0,03). La satisfacción de los profesionales aumentó significativamente tras el PIZ (p= 0,01).Conclusiones: el PIZ demuestra ser eficaz para la disminución del número de interrupciones totales durante el PPAM y para aumentar el grado de satisfacción del equipo de Enfermería respecto a este proceso.(AU)

Objective: to analyze the efficacy of implementing the multi-intervention “Zero Interruptions Program” (ZIP) to reduce the number of interruptions during the process of preparation and administration of medications (PPAM) in the hospital setting, and to increase the satisfaction of Nursing professionals.Method: an analytical, quasi-experimental, pre-post intervention with a single arm in an Orthopedic Surgery Unit in the hospital setting. Sociodemographic and professional data were collected from the participants, as well as self-reported number of interruptions according to the person causing the interruption, other reasons, and work shift when these occurred, and variables of perception of time spent for PPAM and satisfaction regarding the process. A descriptive analysis was conducted, as well as a pre-post comparison of proportions at two months, with the t test for paired samples, considering p< 0.05 as statistically significant.Results: the study included 23 female nurses and seven male nurses. In total, 839 interruptions were recorded before the ZIP and 484 after it. The persons who generated more interruptions were Nursing Assistants (24.3% before and 22.7% after), and the main reasons not originated by persons were those associated with the treatment (24.3% and 22.2% respectively) (p> 0.05). There was a significant reduction in interruptions during the day shift, by 51.3% p< 0,01) and in the night shift, with a 22.8% reduction (p= 0,03). There was a significant increase in the satisfaction of professionales after the ZIP (p= 0.01).Conclusions: the ZIP has shown efficacy in the reduction of the total number of interruptions during the PPAM, and in the increase of the level of satisfaction of the Nursing team regarding this process.(AU)

Coronaviruses in Bats: A Review for the Americas.

The SARS-CoV-2 coronavirus is the focus of attention as it has caused more than three million human deaths globally. This and other coronaviruses, such as MERS-CoV, have been suggested to be related to coronaviruses that are hosted in bats. This work shows, through a bibliographic review, the frequency of detection of coronavirus in bats species of the Americas. The presence of coronavirus in bats has been examined in 25 investigations in 11 countries of the Americas between 2007 and 2020. Coronaviruses have been explored in 9371 individuals from 160 species of bats, and 187 coronavirus sequences have been deposited in GenBank distributed in 43 species of bats. While 91% of the coronaviruses sequences identified infect a single species of bat, the remainder show a change of host, dominating the intragenera change. So far, only Mex-CoV-6 is related to MERS-CoV, a coronavirus pathogenic for humans, so further coronavirus research effort in yet unexplored bat species is warranted.

Current Knowledge and Ecological and Human Impact Variables Involved in the Distribution of the Dengue Virus by Bats in the Americas.

Dengue fever, caused by the dengue virus (DENV), is one of the most important reemerging viral diseases transmitted by arthropods worldwide. DENV is maintained in nature in two transmission cycles: urban and sylvatic. The latter has only been recorded in Africa and Asia and involves nonhuman primates as natural hosts, although it has been suggested that other mammals may play a secondary role as potential reservoir host, including bats. The objective of this article is to review the current state of knowledge about DENV-positive bats in the Americas and to determine what ecological and human impact variables could favor DENV infection in bats. We performed a search of published studies on natural and experimental DENV infection in bats. From 1952 to 2019, 14 studies have been carried out (71.4% in the last decade) examining DENV infection in bats in seven countries of the Americas. DENV infection was examined in 1884 bats of 63 species and DENV was detected in 19 of these species. Clench's model estimated that more than 75 species could be carriers of DENV; therefore, considering that at least 350 species of bats are distributed in the Americas, to detect 95% of the DENV-bearing species, it would be necessary to examine about 10,206 bats of ∼287 species that have not been analyzed until 2019. The species with the highest number of positive cases were Molossus sinaloae and Artibeus jamaicensis. Species, colony size, mean annual temperature, mean annual precipitation, human population size, and bat collection site (site inhabited by humans, vegetation cover, and caves) contributed to explain the variation in DENV detection in bats in the Americas. These results provide evidence on the exposure of bats to DENV in different geographic areas of the Americas and a bat sylvatic transmission cycle is very likely to be occurring, where bats may be either accidental hosts, dead-end hosts, or potential reservoir hosts for DENV.

Perfil y satisfacción del patrón evacuador en pacientes hospitalizados en una unidad de ortogeriatría / Satisfaction profile of the evacuation pattern in patients hospitalized in an orthogeriatric unit

OBJETIVOS: Describir el perfil de los pacientes hospitalizados en la unidad de ortogeriatría de un hospital terciario en lo que respecta a su patrón evacuador e identificar la satisfacción de aquellos durante la hospitalización y los posibles motivos de insatisfacción. METODOLOGÍA: Estudio descriptivo y transversal sobre 200 personas mayores de 65 años ingresadas en la Unidad de Ortogeriatría del Hospital Vall d'Hebron (Barcelona). VARIABLES: sociodemográficas (edad y sexo), polifarmacia, consumo de fibra, consumo de laxantes previo y durante la hospitalización, ingesta hídrica, consumo de mórficos durante la hospitalización, movilización precoz, estreñimiento crónico (Escala Roma III), satisfacción del patrón evacuador tanto en domicilio como durante la hospitalización, principales síntomas y factores desencadenantes de la posible insatisfacción. RESULTADOS: Predominio del sexo femenino (77%) frente al masculino (23%), edad media 83,92 años. Destaca polifarmacia (>5 fármacos) (63%), consumo de opiáceos (57,5%), automedicación de laxantes (52,5%), insatisfacción del patrón evacuador durante el ingreso (65%) respecto al previo (38%) y estreñimiento crónico (25%) según criterios Roma III. El síntoma más descrito por los pacientes es el esfuerzo excesivo para evacuar (60%) y la demora en la respuesta de la llamada (43,84%). Se identificaron 8 factores que explican hasta el 61,25% de la varianza total. CONCLUSIÓN: El estudio ha permitido identificar los factores relacionados con el perfil de los pacientes hospitalizados en la Unidad de Ortogeriatría del Hospital Vall d'Hebron en lo que respecta a su patrón evacuador e identificar la satisfacción respecto al patrón de eliminación durante la hospitalización y los posibles motivos de insatisfacción

OBJECTIVE: Describe the defecation pattern profile of patients hospitalized at Orthogeriatrics Unit of a tertiary Trauma Center, to evaluate defecation satisfaction during hospitalization and potential reasons for dissatisfaction. METHODS: This is a cross-sectional descriptive study of 200 patients (> 65 years old) admitted to the Orthogeriatrics Unit of Hospital Vall d'Hebron. EVALUATED VARIABLES INCLOUDE: sociodemographic date (age and sex), polypharmacy (>5 drugs), fiber intake, laxatives use before and during hospitalization, water intake, morphine intake during hospitalization, early mobilization, chronic constipation (Rome III scale), satisfaction of the evacuation pattern at home and during hospitalization, symptoms and trigger factors of their potential dissatisfaction. RESULTS: Most of the patients were female (77%) with a mean (23%) age of 83.92 years. Among the enrolled patients, (63%) take more than (>5 drugs), 57.5% use opioid and 52.5% reported self-prescribed laxatives use 65% were dissatisfied with their evacuation pattern during admission compared to the previous one (38%). According to Rome III criteria, 25% suffer from chronic constipation. The most reported symptom was the excessive straining (60%) and the trigger factor for dissatisfaction was the delayed response to the call of sanitary teams (43.84%). We obtained eight factors that explain up to 61.25% of the total variance. CONCLUSION: Due to the high rate of dissatisfaction reported by patients while, we believe it is necessary to carry out further research on new tools that improve constipation diagnosis, including specific criteria. Moreover, we recommend the implementation of an action algorithm could diminish the variability of therapeutic approaches in our clinical practice

Projected impact of global warming on the distribution of two pocket mouse species with implications on the conservation of Heteromys nelsoni (Rodentia: Heteromyidae)

Introduction: Understanding how species respond to climate change is critical for implementing conservation strategies. Objective: We explain through potential distributions and changes in altitudinal variation, the possible impacts of climate change in an endangered micro-endemic rodent of Mexico with narrow altitudinal range, Heteromys nelsoni and a rodent with a wide distributional and altitudinal range, Heteromys goldmani. Methods: We obtained historical and current records of both Heteromys species. Potential distribution models were generated using Maxent, including altitudes for each species and bioclimatic layers. We determined the Extent of Occurrence and Area of Occupancy for H. nelsoni according to the criteria of the IUCN in order to generate information about its risk status. Results: The altitude is not a variable that determines a shift in the distribution caused by climate change. In contrast, the temperature and precipitation are important for the potential distribution of both Heteromys species. The future changes in climatic conditions could reduce the area of suitable habitat for both species. Conclusions: The distribution surface is not greater than 33.44 km2 for H. nelsoni. Therefore, is urgent to re-evaluate their conservation status by the IUCN, mainly in its B criterion, and to take specific actions for their conservation. We suggest the creation of a terrestrial protected area.

Introducción: El entendimiento de cómo las especies responden al cambio climático es crítico para la implementación de estrategias de conservación. Objetivo: Explicar a través de distribuciones potenciales y cambios en la variación altitudinal, los posibles impactos del cambio climático en un roedor micro endémico de México, en peligro de extinción y con un rango altitudinal estrecho, Heteromys nelsoni y un roedor con una amplia distribución y rango altitudinal, Heteromys goldmani. Metodología: Obtuvimos registros históricos y actuales de ambas especies. Los modelos de distribución potencial se generaron utilizando Maxent, incluyendo altitudes y capas bioclimáticas. Determinamos la extensión de su presencia y el área de ocupación para H. nelsoni según los criterios de la IUCN, para generar información sobre su estado de riesgo. Resultados: La altitud no es una variable que determina un cambio en la distribución causada por el cambio climático. En contraste, la temperatura y precipitación son importantes para la distribución potencial de ambas especies de Heteromys. Los análisis sugieren que los cambios futuros en las condiciones climáticas podrían reducir el área de hábitat adecuado para ambas especies. Conclusión: La superficie de distribución de H. nelsoni no es mayor a 33.44 km2. Es urgente reevaluar su estado de conservación de la UICN, principalmente en su criterio B y tomar medidas específicas para su conservación. Sugerimos la creación de un área terrestre protegida.

Efectividad de una intervención educativa multidisciplinar en pacientes con fractura de fémur: estudio SWEET HOME / Effectiveness of a multidisciplinary educational intervention in patients with hip fracture: SWEET HOME study

Antecedentes y objetivo: La fractura de fémur (FF) es una lesión frecuente en personas de edad avanzada. El objetivo fue evaluar la efectividad de una intervención educativa multidisciplinar en pacientes con FF para favorecer el regreso al domicilio y disminuir las complicaciones hospitalarias. Material y método: Estudio cuasiexperimental con medidas repetidas al ingreso, al alta, a los 30días y al año de seguimiento. Se incluyeron pacientes ≥65años con FF ingresados en la unidad de ortogeriatría entre febrero de 2016 y enero de 2017. La intervención educativa constó de dos actuaciones coordinadas: una educación sanitaria durante la hospitalización y un soporte multimodal durante la transición al domicilio. Resultados: Se incluyeron 67 pacientes (77,6% mujeres; edad 84,19±7,78 años). Regresaron al domicilio el 70,1%, doblando la cifra de los años 2014-2015. Hubo un 8,5% de reingresos a los 30días y al año. Al año, el nivel de dependencia fue cercano al nivel prefractura (Barthel: 86,67±19,31; 94,33±14,66), la movilidad mejoró respecto al alta (Parker: 4,73±1,84; 6,73±2,76; Timed Up and Go test: 38,29±21,27; 21,91±10,97) y el rendimiento cognitivo no empeoró de forma significativa. La percepción de pacientes, cuidadores y profesionales fue que la educación sanitaria mejoró la autonomía del paciente. La satisfacción con el proceso asistencial fue alta. Conclusiones: Este estudio aporta como novedad, a los beneficios ya descritos en los modelos asistenciales ortogeriátricos, el incremento del número de pacientes que regresan al domicilio en condiciones de seguridad

Background and objective: Hip fracture is a common injury among elderly patients. The main goal of our study was to assess the effectiveness of a multidisciplinary educational intervention aimed at hip fracture patients to promote home discharges and reduce in-hospital complications. Material and method: A quasi-experimental study was performed by taking repeated measurements at hospital admission, at hospital discharge, and at both 30days and one year of discharge. Patients aged ≥65years with hip fracture who were admitted to the Orthogeriatric Service between February 2016 and January 2017 were included in the study. The educational intervention consisted in two coordinated actions: patient education administered during their hospitalization and multimodal support provided during their discharge home. Results: A total of 67 patients were included in the study (77.6% of whom were women; 84.19±7,78 years old). Of these, 70.1% were discharged home, which doubles the figures recorded in the 2014-2015 period. The rate of readmission at 30days and one year of the discharge was 8.5%. At the one-year follow-up, the patient's dependence to perform basic activities of daily living was nearer to the pre-fracture level (Barthel: 86.67±19.31; 94.33±14.66), their mobility had improved in comparison with the time of discharge (Parker: 4.73±1.84; 6.73±2.76; Timed Up and Go Test: 38.29±21.27; 21.91±10.97), and their cognitive function had not worsened significantly. The patient education measures improved the patients' autonomy as perceived by the patients, the caregivers, and the healthcare providers. Satisfaction with the healthcare received was high. Conclusions: As a novelty to the already described benefits in orthogeriatric care models, this study would contribute by proving an increase of the number of patients discharged home in a safe condition

Effectiveness of a multidisciplinary educational intervention in patients with hip fracture: SWEET HOME study. / Efectividad de una intervención educativa multidisciplinar en pacientes con fractura de fémur: estudio SWEET HOME.

BACKGROUND AND OBJECTIVE: Hip fracture is a common injury among elderly patients. The main goal of our study was to assess the effectiveness of a multidisciplinary educational intervention aimed at hip fracture patients to promote home discharges and reduce in-hospital complications. MATERIAL AND METHOD: A quasi-experimental study was performed by taking repeated measurements at hospital admission, at hospital discharge, and at both 30days and one year of discharge. Patients aged ≥65years with hip fracture who were admitted to the Orthogeriatric Service between February 2016 and January 2017 were included in the study. The educational intervention consisted in two coordinated actions: patient education administered during their hospitalization and multimodal support provided during their discharge home. RESULTS: A total of 67 patients were included in the study (77.6% of whom were women; 84.19±7,78 years old). Of these, 70.1% were discharged home, which doubles the figures recorded in the 2014-2015 period. The rate of readmission at 30days and one year of the discharge was 8.5%. At the one-year follow-up, the patient's dependence to perform basic activities of daily living was nearer to the pre-fracture level (Barthel: 86.67±19.31; 94.33±14.66), their mobility had improved in comparison with the time of discharge (Parker: 4.73±1.84; 6.73±2.76; Timed Up and Go Test: 38.29±21.27; 21.91±10.97), and their cognitive function had not worsened significantly. The patient education measures improved the patients' autonomy as perceived by the patients, the caregivers, and the healthcare providers. Satisfaction with the healthcare received was high. CONCLUSIONS: As a novelty to the already described benefits in orthogeriatric care models, this study would contribute by proving an increase of the number of patients discharged home in a safe condition.

Variation and genetic structure of the endangered Lepus flavigularis (Lagomorpha: Leporidae) / Variación y estructura genética de la liebre en peligro de extinción, Lepus flavigularis (Lagomorpha: Leporidae)

Abstract Lepus flavigularis, is an endemic and endangered species, with only four populations inhabiting Oaxaca, México: Montecillo Santa Cruz, Aguachil, San Francisco del Mar Viejo and Santa María del Mar. Nevertheless, human activities like poaching and land use changes, and the low genetic diversity detected with mitochondrial DNA and allozymes in previous studies, have supported the urgent need of management strategies for this species, and suggest the definition of management units. For this, it is necessary to study the genetic structure with nuclear genes, due to their inheritance and high polymorphism, therefore, the objective of this study was to examine the variation and genetic structure of L. flavigularis using nuclear microsatellites. We sampled four populations of L. flavigularis and a total of 67 jackrabbits were captured by night sampling during the period of 2001 to 2006. We obtained the genomic DNA by the phenol-chloroform-isoamyl alcohol method. To obtain the diversity and genetic structure, seven microsatellites were amplified using the Polymerase Chain Reaction (PCR); the amplifications were visualized through electrophoresis with 10 % polyacrylamide gels, dyed with ethidium bromide. Genetic diversity was determined using the software GenAlEx v. 6.4, and genetic structure was obtained with ARLEQUIN v. 3.1; null alleles were evaluated using the program Micro-Checker v.2.2.2. Additionally, a Bayesian analysis was performed with software STRUCTURE v. 2.2.3., and the isolation by distance (IBD) was studied using the program PASSAGE v.2.0.11.6. Our results showed that the genetic variation found was low ( HO = 0.30, HE = 0.24) when compared to other jackrabbit species. Fixed alleles and moderate levels of genetic differentiation (F ST = 0.18, P = 0.001) were detected among populations, indicating the effect of the genetic drift and limited gene flow. Bayesian clustering analysis revealed two groups: (1) jackrabbits from Montecillo Santa Cruz, and (2) individuals living in Aguachil, San Francisco del Mar Viejo and Santa María del Mar. No evidence was found of isolation by distance. It is possible that the geographic barriers present between populations (e.g. lagoons, human settlements), rather than the geographical distance between them, may explain the observed genetic structure. The inbreeding coefficient was negative ( FIS =-0.27, P = 0.03), indicating genetic sub-structure in populations. We suggest two management units based on the genetically closer populations, which will help define precise conservation actions in L. flavigularis. This research is the basis for defining translocation of individuals between populations, nevertheless, a more extensive future study, with specific molecular markers for L. flavigularis, is required. In addition, it is necessary to analyze the barriers that limit the gene flow, since it is urgent to reduce the genetic differentiation between populations and increase the genetic diversity of this species.

Resumen Lepus flavigularis es una especie endémica y en peligro, con solo cuatro poblaciones ubicadas en Oaxaca, México: Montecillo Santa Cruz, Aguachil, San Francisco del Mar Viejo y Santa María del Mar. Las actividades humanas (e.g. cacería, cambios de uso de suelo) y la baja diversidad genética detectada con ADN mitocondrial y aloenzimas muestran la urgencia de desarrollar estrategias de manejo para esta especie. Para definir unidades de manejo es necesario estudiar la estructura genética con genes nucleares debido a su herencia y alto polimorfismo, por lo tanto, el objetivo de este estudio fue examinar la variación y estructura genética de L. flavigularis con microsatélites nucleares. Se obtuvo el ADN genómico de 67 liebres de las cuatro poblaciones de L. flavigularis, capturadas mediante muestreo nocturno de 2001 a 2006, mediante el método fenol-cloroformo-alcohol isoamílico. Para obtener la diversidad y estructura genética se amplificaron siete microsatélites con la Reacción en Cadena de la Polimerasa (PCR). Las amplificaciones se visualizaron mediante electroforesis con geles de poliacrilamida al 10 %, teñidas con bromuro de etidio. La diversidad genética se determinó con el programa GenAlEx v.6.4, y la estructura genética se obtuvo con el ARLEQUIN v.3.1. Se evaluaron los alelos nulos con el programa Micro-Checker v.2.2.2. Adicionalmente, se realizó un análisis bayesiano con el software STRUCTURE v.2.2.3, y se estudió el aislamiento por distancia (IBD) mediante el programa PASSAGE v.2.0.11.6. La variación genética encontrada fue baja ( HO = 0.30, HE = 0.24) en comparación con otras especies de liebres. Se detectaron alelos fijos y diferenciación genética moderada (F ST = 0.18, P < 0.001) entre las poblaciones, lo que indica el efecto de la deriva genética y flujo genético limitado. El análisis Bayesiano reveló dos grupos: (1) liebres de Montecillo Santa Cruz, e (2) individuos de Aguachil, San Francisco del Mar Viejo y Santa María del Mar. No se detectó evidencia de aislamiento por distancia. Es posible que las barreras geográficas presentes entre las poblaciones (e.g. lagunas, asentamientos humanos), más que la distancia geográfica entre ellas, expliquen la estructura genética observada. El coeficiente de endogamia fue negativo ( FIS =-0.27, P = 0.03), indicando sub-estructura genética en las poblaciones. Sugerimos dos unidades de manejo con base en las poblaciones más cercanas genéticamente, lo que ayudará a definir acciones precisas de conservación en L. flavigularis. Esta investigación es la base para definir la translocación de individuos entre las poblaciones, sin embargo, se requiere un estudio futuro más amplio que incorpore marcadores moleculares específicos para L. flavigularis. Asimismo, es necesario analizar las barreras que limitan el flujo genético, ya que es urgente reducir la diferenciación genética entre poblaciones e incrementar la diversidad genética de esta especie.

Genetic evidence supports Sylvilagus mansuetus (Lagomorpha: Leporidae) as a subspecies of S. bachmani.

Since Sylvilagus bachmani (Lagomorpha: Leporidae) from the Baja California Peninsula and S. mansuetus from San Jose Island, Mexico, display an allopatric distribution and are closely related, their taxonomy is unclear. The phylogenetic relationships among specimens of both species were evaluated using two mitochondrial genes (Cyt b, COI) and the beta-fibrinogen nuclear gene intron 7 (ß-fib I7). The genetic analyses revealed that S. mansuetus was included within the S. bachmani clade as the sister-group of S. b. cerrosensis. The genetic distances among S. b. cerrosensis and mansuetus were relatively low (1.3% with Cyt b), similar to intraspecific distances observed within other species of Sylvilagus. We consider mansuetus to be a subspecies of S. bachmani, and the morphological traits previously used to differentiate the two taxa should be used to distinguish S. b. mansuetus from the other subspecies of S. bachmani.

Causes and consequences of change rates in the habitat of the threatened tropical porcupine, Sphiggurus mexicanus (Rodentia: Erethizontidae) in Oaxaca, Mexico: implications for its conservation / Causas y consecuencias de las tasas de cambio en el hábitat del puerco espín tropical amenazado, Sphiggurus mexicanus (Rodentia: Erethizontidae), en Oaxaca, México: implicaciones para su conservación

Land use changes by human activities have been the main causes of habitats and wildlife population degradation. In the Tehuantepec Isthmus in Oaxaca, the tropical habitat of the porcupine Sphiggurus mexicanus has been subject to vegetation and land use changes, causing its reduction and fragmentation. In this study, we estimated vegetation cover and land use (δn) change rates and assessed habitat availability and potential corridors for possible porcupine movements to avoid its isolation. In the study area, the type of vegetation with the most change rate value was the savanna (δn=-2.9), transformed into induced grasslands. Additionally, we have observed the porcupine (since 2011) in semi-deciduous (δn=-0.87) and tropical dry (δn=-0.89) forests that have been transformed in temporal agriculture and mesquite and induced grasslands. The vegetation inhabited by the porcupine resulted in recording a total of 64 plant species (44 trees, nine vines, seven herbs, four shrubs), of which the vine Bunchosia lanceolata showed the highest importance value (41.85) followed by the trees Guazuma ulmifolia (22.71), Dalbergia glabra (18.05), and Enterolobium cyclocarpum (17.02). The habitat evaluation and potential corridor analysis showed that only 1 501.93ha could be considered as suitable habitats with optimum structural conditions (coverage, surface, and distances to transformed areas) to maintain viable populations of S. mexicanus, and 293.6ha as corridors. An increasing destruction of the porcupines’ habitat has been observed in the study area due to excessive logging, and actions for this species and its habitat conservation and management have to be taken urgently. Rev. Biol. Trop. 62 (4): 1481-1494. Epub 2014 December 01.

Los cambios de uso del suelo por actividades humanas, han sido de las principales causas de la degradación, reducción y fragmentación de los hábitats y poblaciones de fauna silvestre. En el Istmo de Tehuantepec, Oaxaca, el hábitat del puercoespín tropical Sphiggurus mexicanus, se encuentra sometido a cambios de cobertura vegetal y uso del suelo, que están causando la reducción y fragmentación de su hábitat. Debido a ello, estimamos las tasas de cambio de la cobertura vegetal y uso del suelo (δn), y evaluamos la disponibilidad del hábitat y de corredores vegetales potenciales para los posibles movimientos del puercoespín tropical y evitar su aislamiento. En el área de estudio el tipo de vegetación con mayor valor de tasa de cambio fue la sabana (δn=-2.9), transformado en pastizal inducido. Adicionalmente, observamos puercoespínes (desde 2011) en selva mediana subperennifolia (δn=-0.87) y selva baja caducifolia (δn=-0.89), los cuales han sido transformados en áreas de cultivo, selva baja espinosa y pastizal inducido. Caracterizamos la vegetación del hábitat del puercoespín, registrando un total de 64 especies vegetales (44 árboles, nueve bejucos, siete hierbas y cuatro arbustos), de los cuales, el bejuco Bunchosia lanceolata, presentó los valores más altos de importancia (41.85), seguidos por los árboles Guazuma ulmifolia (22.71), Dalbergia glabra (18.05), y Enterolobium cyclocarpum (17.02). El análisis de evaluación de hábitat y corredores potenciales mostró que solo 1 501.93ha pueden considerarse como hábitats adecuados con condiciones estructurales (de cobertura, superficie y distancias a áreas transformadas) para mantener poblaciones viables de S. mexicanus; y 293.6ha como corredores. La destrucción del hábitat del puerco espín en el área de estudio está incrementándose por la tala excesiva, por lo tanto, es prioritario emprender acciones para la conservación y manejo del taxón y su hábitat.

Causes and consequences of change rates in the habitat of the threatened tropical porcupine, Sphiggurus mexicanus (Rodentia: Erethizontidae) in Oaxaca, Mexico: implications for its conservation.

Land use changes by human activities have been the main causes of habitats and wildlife population degradation. In the Tehuantepec Isthmus in Oaxaca, the tropical habitat of the porcupine Sphiggurus mexicanus has been subject to vegetation and land use changes, causing its reduction and fragmentation. In this study, we estimated vegetation cover and land use (δn) change rates and assessed habitat availability and potential cor- ridors for possible porcupine movements to avoid its isolation. In the study area, the type of vegetation with the most change rate value was the savanna (δn = -2.9), transformed into induced grasslands. Additionally, we have observed the porcupine (since 2011) in semi-deciduous (δn = -0.87) and tropical dry (δn = -0.89) forests that have been transformed in temporal agriculture and mesquite and induced grasslands. The vegetation inhabited by the porcupine resulted in recording a total of 64 plant species (44 trees, nine vines, seven herbs, four shrubs), of which the vine Bunchosia lanceolata showed the highest importance value (41.85) followed by the trees Guazuma ulmifolia (22.71), Dalbergia glabra (18.05), and Enterolobium cyclocarpum (17.02). The habitat evaluation and potential corridor analysis showed that only 1 501.93ha could be considered as suitable habitats with optimum structural conditions (coverage, surface, and distances to transformed areas) to maintain viable populations of S. mexicanus, and 293.6 ha as corridors. An increasing destruction of the porcupines' habitat has been observed in the study area due to excessive logging, and actions for this species and its habitat conserva- tion and management have to be taken urgently.

A new species of Pelecitus (Filarioidea: Onchocercidae) from the endangered Tehuantepec jackrabbit Lepus flavigularis.

Pelecitus meridionaleporinus n. sp. from the Tehuantepec jackrabbit is described. The new species differs from Pelecitus helicinus (Molin, 1860) in having delicate transverse striations, a salient vulva, and a readily apparent preesophageal ring; P. helicinus has teardrop cells around the vulva, which are lacking in the species presently described. The new species is different from Pelecitus scapiceps (Leidy, 1886) in having the vulva anterior to the esophageal-intestinal junction and wider lateral alae. Pelecitus scapiceps is found in the tarsal bursa of the hind feet of lagomorphs, whereas P. helicinus is found around tendons of legs and feet of birds. Pelecitus meridionaleporinus n. sp. occurs in the subcutaneous tissue at the base of both ears. This is the second species in Pelecitus Railliet and Henry, 1910 that occurs in New World lagomorphs, and the third found infecting mammals.