ABSTRACT Microplastics are generated by the fragmentation of plastic that enters the oceans and is accidentally consumed by various species in the trophic chain. Otariids are considered bioindicators of the presence of microparticles in the environment; however, the level of impact in the coastal area of the Bio-bío region, Chile, is unknown. The aim of this work was to evaluate the presence of this polymer in faeces of sea lions (Otaria flavescenses), in the ‘La Poza’ sector, commune of Talcahuano, Bio-bío region. Stool samples were collected, freeze-dried, digested and subsequently filtered to identify microplastics. Microfibres of various colours were found, with a predominance of black. It is concluded that sea lions were indicators of the circulation of microplastics in their food chain in the sampling area.

RESUMEN Los microplásticos se generan por la fragmentación del plástico que ingresa a los océanos y es consumido accidentalmente por diversas especies que se encuentran en la cadena trófica. Los otáridos son considerados como bioindicadores de la presencia de micropartículas en el ambiente; sin embargo, se desconoce el nivel de afectación en la zona costera de la región del Bio-bío, Chile. El objetivo del presente trabajo fue evaluar la presencia de este polímero en heces de lobos marinos (Otaria flavescens), en el sector ‘La Poza’, comuna de Talcahuano, región del Bio-bío. Se tomaron muestras de heces que fueron liofilizadas, digeridas y posteriormente filtradas para identificar microplásticos. Se encontraron microfibras de varios colores, con predominio del color negro. Se concluye que los lobos marinos fueron indicadores de circulación de microplásticos en su cadena trófica en la zona de muestreo.

Resumo Este estudo objetivou analisar a dieta do cachorro-do-mato, de vida livre, por meio da identificação do conteúdo estomacal de 17 Cerdocyon thous atropelados em duas unidades de conservação da Floresta Amazônica. O conteúdo estomacal foi analisado e os itens alimentares foram quantificados pela frequência de ocorrência (FO) e percentagem de ocorrência (PO). Também foram avaliados os teores de matéria seca (MS), proteína bruta (PB), fibra bruta (FB), extrato etéreo (EE) e, matéria mineral (MM). Foram estimados o extrativo não-nitrogenado (ENN), a energia metabolizável (EM) e a necessidade energética de manutenção. A composição da dieta do cachorro-do-mato apresentou 29 itens alimentares dos diferentes grupos taxonômicos, tendo uma maior diversidade de itens de origem animal (n=22), ainda que a maior FO tenha sido de gramíneas (Poaceae) (41.18%). Dentre os itens de origem animal, 21% eram mamíferos, 18% répteis, 10% anfíbios, 9% invertebrados e 3% aves. Determinou-se um alto teor de FB (62.76%). A média do ENN e da MS foi 5.91% e 141.82 kcal/100g, respectivamente. A média da energia de manutenção foi 447.01 kcal/dia. Estes achados sugerem que o cachorro-do-mato encontrado na Bacia Amazônica é um animal generalista com uma dieta onívora, se alimentando de gramíneas, frutos, insetos, serpentes, anfíbios, aves e pequenos mamíferos, portanto com o mesmo hábito alimentar relatado a esta espécie quando encontrada em outros biomas brasileiros.

Abstract The present study aimed to evaluate the diet of the free-living crab-eating fox by identifying the stomach contents of the 17 crab-eating foxes (Cerdocyon thous) roadkilled in two conservation units, both located in the Amazon rainforest. The food items were quantified by frequency of occurrence (FO) and percentage of occurrence (PO). The stomach contents were analysed for dry matter (DM), crude protein (CP), crude fibre (CF), ether extract (EE), and mineral matter (MM). Nitrogen-free extractives (NFE), metabolisable energy (ME) values, as well as the energy need for maintenance were estimated. The composition of the diet for the crab-eating fox presented 29 food items from the different taxonomic groups, with a greater diversity of items of animal origin (n=22), although the highest frequency of occurrence was gramineae (Poaceae) (41.18%). Among the items of animal origin, 21% were mammals, 18% reptiles, 10% amphibians, 9% invertebrates and 3% birds. A high content of CF (62.76%) were determined. Nitrogen-free extractive and dry matter averages were 5.91% and 141.82 kcal/100g, respectively. The average maintenance energy was 447.01 kcal/day. These findings suggesting that the crab-eating foxes have a generalist diet with an omnivorous diet in the Amazon basin, feeding on gramineae, fruits, insects, snakes, amphibians, birds and small mammals and have the same feeding habit that present in other Brazilian biomes.

Resumo Os mamíferos têm uma capacidade limitada de regenerar seus tecidos e órgãos. Um dos mecanismos associados à regeneração natural é a desdiferenciação. Várias moléculas pequenas, como vitamina C e fatores de crescimento, podem melhorar a eficiência da reprogramação. Neste estudo, as células NTERA2-D1 (NT2) foram induzidas à diferenciação (NT2-RA) com ácido retinóico (RA) 10-5 M por três dias e depois submetidas a várias quantidades de humor vítreo (VH). Os resultados mostram que a taxa de crescimento dessas células foi reduzida, enquanto essa taxa foi parcialmente restaurada após o tratamento com VH (NT2-RA-VH). A análise do ciclo celular com o método PI também mostrou que o número de células na fase S do ciclo celular nessas células estava aumentado. Os níveis de antígenos SSEA3 e TRA-1-81 em NT2-RA diminuíram, mas aumentaram em NT2-RA-VH a um nível semelhante ao das células NT2. O nível de SSEA1 teve um padrão oposto. A expressão do gene OCT4 diminuiu após o tratamento com AR, mas foi recuperado em células NT2-RA-VH. Em conclusão, sugerimos o VH como uma mistura potente para melhorar a reprogramação celular levando à desdiferenciação.

Abstract Mammals have a limited capacity to regenerate their tissues and organs. One of the mechanisms associated with natural regeneration is dedifferentiation. Several small molecules such as vitamin C and growth factors could improve reprogramming efficiency. In this study, the NTERA2-D1 (NT2) cells were induced towards differentiation (NT2-RA) with 10-5 M retinoic acid (RA) for three days and then subjected to various amounts of vitreous humor (VH). Results show that the growth rate of these cells was reduced, while this rate was partly restored upon treatment with VH (NT2-RA-VH). Cell cycle analysis with PI method also showed that the numbers of cells at the S phase of the cell cycle in these cells were increased. The levels of SSEA3 and TRA-1-81 antigens in NT2-RA were dropped but they increased in NT2- RA-VH to a level similar to the NT2 cells. The level of SSEA1 had an opposite pattern. Expression of OCT4 gene dropped after RA treatment, but it was recovered in NT2-RA-VH cells. In conclusion, we suggest VH as a potent mixture for improving the cellular reprogramming leading to dedifferentiation.

Resumen Antecedentes: La adolescencia está marcada por búsqueda de la novedad y acentuada sensibilidad a las propiedades estresantes de los estímulos novedosos. A pesar de la necesidad de probar nuevos alimentos potencialmente tóxicos durante el periodo de crecimiento adolescente, la neofobia gustativa y su atenuación durante este periodo apenas ha sido estudiada. Método: Se evaluaron la neofobia gustativa y los procesos de memoria relacionados en ratas Wistar macho y hembra adolescentes (PND28) y adultas (PND70). En los Experimentos 1 y 2 Se exploró la atenuación de la neofobia gustativa a soluciones de vinagre de sidra (3%) y sacarina sódica (0,1%), respectivamente. En los experimentos 3 y 4, se evaluó también la inhibición latente de aversiones gustativas y la memoria de reconocimiento de objetos. Resultados: Adolescentes y adultos mostraron neofobia gustativa a la sacarina, pero las ratas adolescentes requirieron más exposiciones a la solución de vinagre para reconocerla como segura. No hubo diferencias entre los grupos en los Experimentos 3 and 4. No se hallaron efectos significativos del sexo. Conclusiones: A pesar de la ampliamente aceptada asociación entre adolescencia y reducida neofobia, las ratas adolescentes muestran neofobia al sabor que resulta incluso incrementada cuando se trata de sabores ácidos.

Abstract Background: Adolescence in mammals is a period marked by increased novelty-seeking and enhanced responsiveness to the stressful properties of novel stimuli. Despite the need to taste potentially toxic novel foods during the adolescent growth spurt, there has been little study of taste neophobia and its attenuation. Method: Four experiments were carried out to compare taste neophobia and related memory processes in male and female adolescent (PND28) and adult (PND70) Wistar rats. Experiments 1 and 2 evaluated attenuation of taste neophobia to cider vinegar (3%) and sodium saccharin (0.1%) solutions were evaluated. Additionally, to test the role of memory in neophobia during adolescence, latent inhibition of taste aversion and object recognition memory were assessed in Experiment 3 and Experiment 4, respectively. Results: Adolescent and adult rats exhibited taste neophobia to the saccharin solution but adolescent rats required more exposure trials than adults to recognize the vinegar solution as safe. Both groups exhibited similar latent inhibition of taste aversion and object recognition memory. No sex effect was significant. Conclusions: Contrary to the accepted view associating adolescence with reduced neophobia, adolescent rats exhibited taste neophobia which even increased when sour tastes were encountered.

Abstract Introduction: Communication is part of economic and social development around the globe. The development of roads causes the fragmentation of natural ecosystems, increasing the mortality risk of wild animals due to vehicle collisions. Objective: To analyze the mortality rate of wild vertebrates run over according to the climatic season and the urbanization degree in the coastal area of the Guerrero state, in Southern Mexico. Methods: 12 trips with three observers using a vehicle at a speed of 30 km/h were conducted during one year (June 2021 to May 2022). The organisms were geo-referenced and identified. The roadkill rate (roadkill/day/km) was calculated for the wild vertebrates. Results: In total, 37 species of ran over wild vertebrates were registered, of which nine are considered endangered and seven are endemic of Mexico. Mammals had the highest mortality rate (0.126 roadkill/day/km). No differences were found in the mortality rate among rainy and dry seasons; 11 roadkill hotspots were detected. More incidences of roadkill were identified in low urbanization zones than medium and high urbanization areas. Conclusions: Our results showed that mammals are the most vulnerable wild vertebrates to vehicle collisions. The roadkill risk of wild animals is related to the urbanization level. This study can be a tool in the development of sustainable roads for wildlife.

Resumen Introducción: Las vías de comunicación son parte del desarrollo económico y social en todo el mundo. El desarrollo de carreteras causa la fragmentación de ecosistemas naturales, aumentando el riesgo de mortalidad de los animales silvestres por atropellamientos vehiculares. Objetivo: Analizar la tasa de mortalidad de vertebrados silvestres atropellados de acuerdo con la temporada climática y el grado de urbanización en una zona costera del estado de Guerrero, al sur de México. Métodos: Se realizaron 12 recorridos con tres observadores en un vehículo a una velocidad de 30 km/h durante un año (junio de 2021 a mayo de 2022). Los organismos fueron georreferenciados e identificados. Se calculó la tasa de atropellamiento (atropellos/día/kilómetro) de los vertebrados silvestres. Resultados: Se registraron 37 especies de vertebrados silvestres atropellados, de las cuales nueve están en peligro de extinción y siete son endémicas de México. Los mamíferos presentaron la tasa de mortalidad más elevada (0.126 animales atropellados/día/km). No hubo diferencias en la tasa de mortalidad entre temporadas. Se detectaron 11 puntos calientes (hotspots) de atropellos. Se identificaron más vertebrados silvestres atropellados en zonas de baja urbanización que en áreas de media y alta. Conclusión: Nuestros resultados mostraron que los mamíferos son los vertebrados silvestres más vulnerables a los atropellamientos vehiculares. El riesgo de atropellamientos de animales silvestres está relacionado con el nivel de urbanización. Este estudio puede ser una herramienta en el desarrollo de carreteras sustentables para la fauna silvestre.

Resumen Introducción: Los mamíferos medianos y grandes están amenazados globalmente debido a la pérdida y fragmentación de su hábitat. En Costa Rica, los fragmentos de bosque fuera de áreas protegidas pueden servir como refugio o sitio de paso para estos animales. La presencia de mamíferos en ambientes fragmentados puede estar influenciada por la disponibilidad de recursos, la cual puede variar ampliamente en sitios con una estacionalidad marcada. Objetivo: Determinar la riqueza de especies de mamíferos medianos y grandes en un fragmento de bosque, y examinar si la diversidad y detectabilidad de estas especies variaron entre la época seca y lluviosa. Métodos: Establecimos 26 estaciones de cámaras trampa en el Bosque Municipal de Atenas (Alajuela, Costa Rica), un fragmento de bosque de 26.4 ha, que brinda agua potable a cerca de 1 800 personas. Desde agosto de 2021 hasta abril de 2022, una cámara trampa estuvo activa en cada estación durante 12-21 días en cada época (seca y lluviosa), para un total de 810 días cámara trampa. Aplicamos curvas de rarefacción y extrapolación para caracterizar la diversidad de especies y compararla entre la época seca y lluviosa. Resultados: Registramos 19 especies de mamíferos medianos y grandes, siendo las más detectadas el pizote (Nasua narica; 0.254 detecciones/día cámara trampa) y la guatusa (Dasyprocta punctata; 0.163 detecciones/día cámara trampa). También, registramos cuatro especies consideradas en peligro de extinción en Costa Rica, tres felinos: Puma concolor, Herpailurus yagouaroundi, Leopardus pardalis y la nutria, Lontra longicaudis. No observamos un efecto de la estacionalidad en la diversidad, pero sí en la detectabilidad, la cual fue mayor durante la época lluviosa. Conclusiones: Nuestro estudio demuestra cómo la protección de parches de bosque pequeños puede contribuir a la conservación de mamíferos en paisajes fragmentados.

Abstract Introduction: Medium and large-sized mammals are threatened globally due to habitat loss and fragmentation. In Costa Rica, forest fragments that remain outside protected areas may serve as a refuge or corridor for these animals. Mammal presence in fragmented landscapes may be influenced by resource availability, which varies greatly in seasonal regions. Objective: To determine the species richness of medium and large-sized mammals in a forest fragment, and to examine if species diversity and detectability varied between the wet and dry season. Methods: We established 26 camera trap stations throughout the Municipal Forest of Atenas (Alajuela, Costa Rica), a 26.4 ha forest fragment that provides water to about 1 800 people. From August 2021 to April 2022, one camera trap was active at each station for 12-21 days throughout each season (dry and wet), for a total of 810 camera trap days. We applied rarefaction and extrapolation curves to characterize mammal's species diversity and compare it between seasons. Results: We detected 19 species of mammals. The most frequently detected species were the White-nosed Coati (Nasua narica; 0.254 detections/camera trap day), and the Central American Agouti (Dasyprocta punctata; 0.163 detections/camera trap day). We also registered four species considered as endangered in Costa Rica, three felines: Puma concolor, Herpailurus yagouaroundi, Leopardus pardalis, and the Neotropical River Otter, Lontra longicaudis. Seasonality did not affect species diversity, but it influenced dominant species and detectability, which was greater during the wet season. Conclusions: Our study demonstrates how protecting small forest fragments, can help conserve endangered medium and large-sized mammals in human-dominated landscapes.

ABSTRACT Introduction: Monkeypox is a zoonotic disease that was first identified in 1958. The virus is a member of Orthopoxvirus genus, of Poxviridae family. It infects wide variety of mammals and its natural reservoir is unknown. Objectives: To describe the important aspects related to pathophysiology, genome, pathogenesis, transmission, replication and immunology of monkeypox. Methods: A search of original articles, case reports, bibliographic and systematic reviews was carried out in VHL Regional Portal, PubMed, Science, Nature and Lancet. Reports from the World Health Organization and the Pan American Health Organization on monkeypox were consulted. Results: Spread of monkeypox virus can occur through close contact with lesions, body fluids, respiratory droplets, and contaminated objects. Once inside the body, the virus infects mucous membranes, epithelial cells and immune cells of adjacent tissues. The virus replicates and spreads rapidly through the blood and lymphatic system. T cells play an important role in regulating the immune response against the virus. However, Orthopoxviruses have developed several mechanisms to evade the immune response. Conclusions: The important aspects described, taken into account about monkeypox transmission, have significantly changed over time. 2022 global monkeypox outbreak presented a chain of transmission primarily among humans associated with sexual contact.

RESUMEN Introducción: La viruela símica es una enfermedad zoonótica identificada por primera vez en 1958. El virus es un miembro del género Orthopoxvirus, de la familia Poxviridae. Infecta a una amplia variedad de mamíferos y se desconoce su reservorio natural. Objetivos: Describir los aspectos importantes relacionados a la fisiopatología, genoma, patogénesis, transmisión, replicación e inmunología de la viruela símica. Métodos: Se realizó una búsqueda de artículos originales, reportes de casos, revisiones bibliográficas y sistemáticas en el Portal Regional de la BVS, PubMed, Science, Nature y Lancet. Se consultaron los informes de la Organización Mundial de la Salud y la Organización Panamericana de la Salud sobre la viruela símica. Resultados: La propagación del virus de la viruela símica puede ocurrir a través del contacto cercano con lesiones, fluidos corporales, gotitas respiratorias y objetos contaminados. Una vez dentro del organismo, el virus infecta mucosas, células epiteliales y células inmunitarias de los tejidos adyacentes. El virus se replica y disemina rápidamente a través del sistema hemático y linfático. Las células T desempeñan un papel importante en la regulación de la respuesta inmunitaria contra el virus. Sin embargo, los Orthopoxvirus han desarrollado varios mecanismos para la evasión de la respuesta inmunitaria. Conclusiones: Los aspectos importantes descritos que se tuvieron en cuenta acerca de la transmisión de la viruela símica han tenido cambio significativo con el tiempo. El brote mundial de viruela símica de 2022 presentó una cadena de transmisión principalmente entre humanos asociada al contacto sexual.

Resumen Los roedores son organismos muy importantes dentro de los ecosistemas; sin embargo, algunas especies son consideradas como plagas porque consumen y dañan cultivos y porque son vectores, hospederos o reservorios en la trasmisión de enfermedades infecciosas emergentes. Los roedores en Bolivia están representados por 148 especies, entre las cuales Oligoryzomys microtis (Allen, 1916) es de importancia en salud pública, debido a que se considera como potencial reservorio natural del virus Chapare, el cual produce la fiebre hemorrágica Chapare, enfermedad mortal para el ser humano y con un impacto en la salud pública aún desconocido. En este estudio se registró la presencia de la especie O. microtis en los hábitats silvestres e intervenidos de la comunidad de Samuzabety, sitio en el que se detectó por primera vez el virus Chapare. Esta comunidad se encuentra ubicada en la Provincia Chapare del departamento de Cochabamba, Bolivia. Las especies registradas fueron los roedores Oligoryzomys microtis (morfotipo mattogrossae), Proechimys brevicauda, Neacomys vargasllosai, Hylaeamys perenensis y el marsupial Metachiurus nudicaudatus. Se confirma la presencia de la especie O. microtis (morfotipo mattogrossae) en la comunidad de Samuzabety, la cual se encuentra asociada con hábitats de bosques, cultivos cercanos y alrededores. La especie O. microtis tiene relevancia epidemiológica al ser el reservorio natural del hantavirus Río Mamoré y al ser considerado actualmente como potencial reservorio del virus Chapare y de otros arenavirus.

Abstract Rodents are very important organisms within ecosystems; however, some species are considered pests because they consume and damage crops and because they are vectors, hosts, or reservoirs in the transmission of emerging infectious diseases. Rodents in Bolivia are represented by 148 species, Oligoryzomys microtis (Allen, 1916) being a species of public health importance because it is considered a potential natural reservoir of the Chapare virus, which causes Chapare Hemorrhagic Fever, and it is a deadly disease for humans. Its impact on public health is still unknown. The present study consisted of recording the presence of the species O. microtis through the use of Sherman-type live capture traps for small mammals arranged in linear transects in the wild and intervened habitats of the Samuzabety community, where the Chapare virus was detected for the first time, this community is located in the Chapare Province of the department of Cochabamba, Bolivia. The species recorded were the rodents Oligoryzomys microtis (morphotype matogrossae), Proechimys brevicauda, Neacomys vargasllosai, Hylaeamys perenensis, and the marsupial Metachiurus nudicaudatus. The presence of the species O. microtis (morphotype matogrossae) in the community of Samuzabety is confirmed. This species is associated with forest habitats with nearby and surrounding crops. The species O. microtis has epidemiological relevance, as it is the natural reservoir of the Río Mamoré Hantavirus and is currently considered a potential reservoir of the Chapare virus and other Arenaviruses.

We created a role-playing game (RPG) about Cerrado, the Brazilian savanna, in order to translate scientific knowledge to the general public and to contribute to environmental education in schools. With this game, we aimed to disseminate knowledge about Cerrado native plant and animal species and the biome phytophysiognomies. The RPG quest involves seed dispersal by animals, thus showing the interdependence between flora and fauna. Moreover, by presenting as fictional characters the big mammals of Cerrado, we expect that the participants experience the threats faced by these animals due to anthropogenic actions. The use of the RPG is an active methodology that mobilizes competences and skills from National Common Curricular Basis (BNCC). In a case study, we report the use of the game in high school classes at a Full-Time State School (CEPI) in the state of Goiás, Brazil, which is a public school in the Cerrado region. The students actively participated in the game, including students with special needs and students that usually do not participate in classes that use traditional teaching methods. Students made positive comments about the game, and were interested in learning more about Cerrado species. We conclude that the Cerrado RPG can be used as an efficient teaching tool.

Diante do desafio de traduzir o conhecimento científico para uma linguagem acessível ao público leigo e de contribuir para a educação ambiental nas escolas, elaboramos um jogo de tabuleiro no formato role-playing game (RPG) sobre o bioma Cerrado. Com esse jogo, objetivamos difundir o conhecimento sobre espécies nativas de plantas e animais do Cerrado e as fitofisionomias do bioma. A missão do jogo envolve a dispersão de sementes por animais e mostra a interdependência entre flora e fauna. Além disso, ao apresentar como personagens fictícios os grandes mamíferos do Cerrado, visamos que os participantes vivenciem as ameaças enfrentadas pela fauna devido a ações antrópicas. O jogo consiste em uma metodologia ativa que mobiliza competências e habilidades da Base Nacional Comum Curricular (BNCC) e está disponibilizado em um formato pronto para ser jogado. Apresentamos um relato de experiência, no qual descrevemos a utilização do jogo em turmas de Ensino Médio em um Centro de Ensino em Período Integral (CEPI) em Goiás, uma escola pública na região do Cerrado. As turmas participaram ativamente do jogo, incluindo estudantes com necessidades especiais e estudantes que não costumam participar de aulas que utilizam métodos tradicionais de ensino. Os estudantes afirmaram terem gostado de jogar e fizeram comentários positivos sobre o jogo, além de demonstrarem interesse em aprender mais sobre plantas e animais do Cerrado. Concluímos que o jogo de RPG do Cerrado pode ser utilizado como uma eficiente ferramenta de ensino.

Abstract 26. Echinococcus vogeli originates neotropical polychistic echinococcosis, an emerging zoonotic disease in tropical countries of Central and South America. Its life cycle is adapted to a mandatory relationship between the bush dog (Speothos venaticus) and one of its main prey, the paca (Cuniculus paca), which is, in turn, one of the most consumed species as a source of animal protein in the Peruvian Amazon. The aim of this work was to evaluate the frequency of E. vogeli in pacas hunted for personal consumption by inhabitants in the high basin of the Itaya River. During 2016-2017, subsistence hunters from the communities of Melitón Carbajal, Luz del Oriente, 28 de Enero and Nueva Villa Belén collected liver and lungs of 36 pacas and the liver of a nine-banded armadillo (Dasypus novemcinctus). These organs were analyzed by parasitological, including macroscopic, microscopic-morphometric analysis. The 13.5% (5/37) of the wild mammals collected (paca n=4; nine-banded armadillo n=1) presented polycystic masses in the liver, with rostral hooks of protocystic scolices compatible with E. vogeli. This work contributes to the ecoepidemiological knowledge of new records on the distribution of E. vogeli and confirms the first record of E. vogeli in the nine-banded armadillo in the Peruvian Amazon, reinforcing the need to raise awareness, prevent, monitor, control and expand the search for neotropical echinococcosis and other zoonoses in wildlife and human populations in coexistence, from the “One Health” approach.

Resumen 22. Echinococcus vogeli origina la Equinococosis Neotropical Poliquística, enfermedad zoonótica emergente en países tropicales de Centro y Sur América. Su ciclo natural está adaptado a una relación predador-presa representado principalmente por el perro de monte (Speothos venaticus) y el majaz (Cuniculus paca), que es una de las especies silvestres más consumidas en la Amazonia. El objetivo de este trabajo fue evaluar la frecuencia de E. vogeli en majaces cazados para consumo personal por pobladores de la cuenca alta del Río Itaya, en la Amazonía peruana. Durante el periodo 2016-2017, cazadores de subsistencia de las comunidades de Melitón Carbajal, Luz del Oriente, 28 de Enero y Nueva Villa Belén realizaron la colecta de hígados y pulmones de 36 majaces y el hígado de un armadillo de nueve bandas, (Dasypus novemcinctus). Se realizaron análisis parasitológicos, que incluyó descripciones macroscópicas, microscópicas y morfometría. El 13,5% (5/37) de los mamíferos silvestres colectados (majaz n=4; armadillo de nueve bandas n=1) presentaron masas poliquísticas en hígado, con ganchos rostelares de protoescólices compatibles con E. vogeli. Este trabajo aporta al conocimiento ecoepidemiológico de nuevos registros sobre la distribución de E. vogeli y confirma el primer registro de E. vogeli en armadillo de nueve bandas en la Amazonia peruana, reforzando la necesidad de concientizar, prevenir, monitorear, controlar y ampliar la búsqueda de la equinococosis neotropical y otras zoonosis en fauna silvestre y en poblaciones humanas en coexistencia, desde el enfoque de “Una Salud”.

SUMMARY: In this work, we report new records of the Chilean shrew opossum (Rhyncholestes raphanurus), one of the least known mammals of the South American temperate rainforests. Using camera traps, we detected Chilean shrew opossums on 31 different occasions distributed over 17 sites, located in two protected areas of the Los Ríos region, southern Chile. The records, obtained in evergreen and alerce forests, as well as in eucalyptus plantations, show markedly nocturnal activity. These findings represent a significant increase in the number of locations where the presence of this species has been confirmed.

RESUMEN: En este trabajo, presentamos nuevos registros de la comadrejita trompuda (Rhyncholestes raphanurus), uno de los mamíferos más desconocidos de los bosques templados sudamericanos. Por medio de trampas cámaras, detectamos comadrejitas trompudas en 31 ocasiones distribuidas en 17 sitios, ubicados en dos áreas protegidas de la Región de Los Ríos, sur de Chile. Los registros, obtenidos en bosque siempreverde, alerce y plantaciones de eucaliptos, muestran una actividad marcadamente nocturna. Estos hallazgos representan un incremento significativo en el número de localidades con presencia confirmada de esta especie.

Resumen Los ecosistemas tropicales albergan una amplia diversidad de mamíferos medianos y grandes. El objetivo de esta investigación fue estimar la diversidad de especies de mamíferos medianos y grandes mediante fototrampeo en acahuales y Selva alta perennifolia del Sitio Experimental Las Margaritas, ubicado en la Sierra Nororiental de Puebla. Se muestrearon dos áreas de vegetación con diferentes grados de recuperación: vegetación secundaria (acahual) y Selva alta perennifolia. Se estimaron riqueza, abundancia, y diversidad alfa y beta de mamíferos medianos y grandes. Se registraron 19 especies de mamíferos silvestres pertenecientes a seis órdenes y 10 familias; las especies más abundantes fueron Nasua narica, Didelphis marsupialis y Dasypus novemcinctus, mientras que Herpailurus yagouaroundi, Potos flavus, Puma concolor, Leopardus wiedii, Urocyon cinereoargenteus y Conepatus leuconotus registraron la menor abundancia. El acahual y la Selva alta perennifolia presentaron una riqueza proporcional y una diversidad alfa con valores de H´=2.04 y 2.11, el Índice de Pielou fue de J’=0.94 y 0.89, el índice de Simpson tuvo valores de λ=0.14 y 0.16, respectivamente; la complementariedad fue de 32 %, lo que representa una escasa diferenciación de la equidad de las comunidades de especies existentes en las dos áreas. La diversidad beta correspondió a 68 % de similitud, ello indica una complementariedad intermedia entre hábitats. Los ecosistemas del Sitio Experimental “Las Margaritas” funcionan como refugio de una diversidad notable de mamíferos medianos y grandes que incluyen cuatro especies listadas en la NOM-059-SEMARNAT-2010.

Abstract Tropical ecosystems are home to a wide diversity of medium-sized and large mammals. The objective of this research was to estimate the species diversity of medium-sized and large mammals by photo-trapping in the high grass and Evergreen tropical rain forest of the Las Margaritas Experimental Site, located in the Northeastern Sierra of Puebla. Two vegetation areas with different degrees of recovery were sampled: secondary vegetation (high grass) and Evergreen tropical rain forest. The richness, abundance, and alpha and beta diversity of medium-sized and large mammals were estimated. Nineteen species of wild mammals belonging to six orders and 10 families were recorded; the most abundant species were Nasua narica, Didelphis marsupialis, and Dasypus novemcinctus; Herpailurus yagouaroundi, Potos flavus, Puma concolor, Leopardus wiedii, Urocyon cinereoargenteus, and Conepatus leuconotus were the least abundant. The high grass and the Evergreen tropical rain forest presented a proportional richness and alpha diversity with values of H´=2.04 and 2.11, the Pielou index was J’=0.94 y 0.89, Simpson's index had values of λ=0.14 y 0.16, respectively; the complementarity rate was 32 %, which represents a low differentiation of the equity of the species communities existing in the two areas. The beta diversity corresponded to 68 % similarity, this indicates an intermediate complementarity between habitats. The ecosystems of the Las Margaritas Experimental Site serve as a refuge for a remarkable diversity of medium-sized and large mammals, including four species listed in the norm NOM-059-SEMARNAT-2010.

Resumen Muchos microorganismos capaces de producir infecciones en el ser humano son de origen zoonótico. Entre éstos está Pasteurella multocida, la cual se encuentra como comensal y/o patógeno oportunista, colonizando el tracto gastrointestinal y respiratorio de gran cantidad de mamíferos y aves. Por otro lado, Staphylococcus aureus es un colonizante de piel y nasofaringe y un patógeno oportunista para seres humanos y animales y su transmisión podría ser bidireccional. Se presenta un caso de neumonía por P. multocida y S. aureus en una mujer sin enfermedad subyacente, que acogía perros y gatos abandonados e ingresó con politraumatismo por caída desde un quinto piso. Ambos microorganismos fueron recuperados en una muestra de aspirado traqueal e identificados por Vitek®2 Compact. La identificación de P. multocida fue confirmada por espectrometría de masas (MALDI-TOF-MS) y presentó sensibilidad a penicilina, cefotaxima, amoxicilina-ácido clavulánico, ciprofloxacina, tetraciclina y trimetoprima-sulfametoxazol. S. aureus era sensible a meticilina sin resistencia acompañante.

Resumo Muitos dos microrganismos capazes de produzir infecções no ser humano têm origem zoonótico. Entre eles está a Pasteurella multocida, que se encontra como comensal e/ou patógeno oportunista, colonizando o trato gastrintestinal e respiratório de grande quantidade de mamíferos e aves. Por outro lado, Staphylococcus aureus é um colonizador de pele e nasofaringe e um patógeno oportunista para seres humanos e animais e sua transmissão poderia ser bidirecional. Apresenta-se um caso de pneumonia por P. multocida e S. aureus em uma mulher, sem doença subjacente, que abrigava cães e gatos abandonados e entrou com múltiplos traumatismos devido à queda desde o quinto andar. Ambos os microrganismos foram obtidos da amostra de aspiração traqueal e identificados por Vitek®2 Compact. A identificação de P. multocida foi validada por espectrometria de massas (MALDI-TOF MS) e apresentou sensibilidade à penicilina, cefotaxima, amoxicilina-ácido clavulânico, ciprofloxacina, tetraciclina e trimetoprim-sulfometoxazol. S. aureus era meticilino sensível sem resistência acompanhante.

Abstract Many microorganisms capable of producing infections in humans are of zoonotic origin. Among them, Pasteurella multocida, is a commensal and/or opportunistic pathogen that colonises the gastrointestinal and the respiratory tract of a great number of mammals and birds. On the other hand, Staphylococcus aureus is a coloniser of skin and nasopharynx and an opportunistic pathogen in humans and animals, whose transmission might be bidirectional. A case of pneumonia by P. multocida and S. aureus was presented in a woman without an underlying condition, who sheltered stray dogs and cats and was admitted with multiple trauma due to a fall from a fifth floor. Both microorganisms were recovered from a tracheal aspirate sample and identified by Vitek®2 Compact. Identification of P. multocida was confirmed by mass spectrometry (MALDI-TOF MS) and was susceptible to penicillin, cefotaxime, amoxicillin-clavulanic acid, ciprofloxacin, tetracycline and trimethoprim-sulfamethoxazole. S. aureus was methicillin-susceptible without accompanying resistance.

ABSTRACT The forest of Araucaria araucana ("pewen" in Mapuche language), with its associated species of the genus Nothofagus, is unique from an evolutionary, biological and sociocultural point of view. Due to the interdependence and interrelation with the Mapuche-Pewenche people, it is considered a biocultural ecosystem. This work is a comprehensive binational review of current scientific information applicable to its management and conservation. The scientific community contributed with significant advances in the knowledge of: a) the interrelationships within and significance of this biocultural ecosystem; b) the regional genetic diversity; c) the fire regimen, its main drivers, its role in forest dynamics, and the recovery capacity of biodiversity in the face of different burn severities; d) the ecological role of seed production and its unusual interactions with granivorous fauna and cavity nesters; e) the decline and death of the canopy, due to environmental stress and the emergence of new pewen pathogens; f) the consequences of the invasion of pines and exotic mammals that alter the biological interactions and the original ecological processes, and g) the effects of cattle ranching and overexploitation of firewood and pine nuts on ecological integrity and biodiversity. This knowledge is considered essential to strengthen policies and strategies for protection, conservation, and management of this ecosystem, which is endemic, rare, regionally threatened, and globally declared endangered. Considering the identified problems, it is imperative to achieve social empowerment of the Mapuche-Pehuenche people, intercultural respect, and enforcing public policies for the conservation and sustainable use of these forests.

RESUMEN El bosque de Araucaria araucana (“pewén” en lengua Mapuche), con sus especies asociadas del género Nothofagus, es singular desde el punto de vista evolutivo, biológico y sociocultural. Por la interdependencia con el pueblo Mapuche-Pewenche, se lo considera un ecosistema biocultural. Este trabajo es una revisión integral binacional de información científica actualizada aplicable a su gestión y conservación. La comunidad científica avanzó significativamente en el conocimiento de: a) la interrelación y significancia del ecosistema biocultural; b) la diversidad genética regional; c) el régimen de incendios, sus factores determinantes, su rol en el bosque y la capacidad de recuperación de la biodiversidad frente a distintas severidades de quema; d) el rol ecológico de la producción de semillas y sus interacciones con la fauna granívora y nidificadora de cavidades; e) el decaimiento y muerte del dosel debido al estrés ambiental y al surgimiento de nuevos patógenos del pewén; f) las consecuencias de la invasión de pinos y de mamíferos exóticos que alteran las interacciones biológicas y los procesos ecológicos originales y; g) los efectos de la ganadería y la sobreexplotación de leña y piñones sobre la integridad ecológica y la biodiversidad. Este conocimiento se considera fundamental para fortalecer políticas y estrategias de protección, conservación y gestión de este ecosistema endémico, escaso, amenazado regional y globalmente declarado en peligro. Frente a las problemáticas identificadas, es imperioso lograr el empoderamiento social del pueblo Mapuche-Pehuenche, el respeto intercultural y la efectivización de las políticas públicas para la conservación y uso sustentable de este ecosistema biocultural.

Resumen Antecedentes: Para poblaciones con distribución fragmentada, la alta remoción de frutos/semillas puede representar un cuello de botella para su propagación a nuevas áreas. Por lo que es importante conocer cómo la vegetación y el comportamiento de los comedores de frutos influyen en el patrón espacial de remoción. Pregunta: ¿De qué manera la densidad de la vegetación influye en la probabilidad de remoción de frutos post-dispersión de P. hintonii? Sitio y fecha: Estación Científica las Joyas, Reserva de la Biósfera Sierra de Manantlán, Jalisco. Abril-mayo 2015. Métodos: El número de frutos removidos fue registrado en áreas con sotobosque denso y escaso, en dos tipos de bosques y dos áreas abiertas cubiertas de arbustos. Para identificar las especies de vertebrados removedores de frutos, fueron colocadas cámaras-trampas bajo dosel de P. hintonii con alta producción de frutos. Resultados: La remoción de frutos fue más bajo en áreas con baja densidad de sotobosque en pino-encino (11.17 ± 5.30 %) y áreas abiertas (25.5 ± 2.39 %), comparado al bosque nublado (72.51 ± 0.60 %). El número de días para el inicio de la remoción de frutos fue más bajo en el bosque nublado y pino-encino con sotobosque denso, que en aquellos con sotobosque escaso. Se identificaron seis especies de mamíferos y tres especies de aves consumidoras de frutos de P. hintonii; Pecari tajacu y pequeños mamíferos fueron los más importantes removedores de semillas. Conclusiones: Sotobosques poco densos en pino-encino favorecen menor remoción de frutos de P. hintonii, asociado probablemente al comportamiento de sus consumidores.

Abstract Background: High post-dispersal fruit-seed removal can be a bottleneck for successful propagation to new areas of plant populations with fragmented distribution, as in cloud forest. Therefore, it is important to know how vegetation and fruit-eating behavior will influence the spatial removal pattern. Questions and/or Hypotheses: How do vegetation structure and density influence fruit removal of Persea hintonii in potential propagation areas? Study site and dates: Las Joyas Scientific Station, Sierra de Manantlán Biosphere Reserve, Jalisco, Mexico. April-May 2015. Methods: The number of fruits removed were recorded in treatments excluding of different size vertebrates, in areas with a dense or sparse understory within two forest types plus open areas with shrub cover. To identify vertebrate fruit-removing species, camera-traps were placed under the canopy of P. hintonii trees with high fructification amounts. Results: Fruit removal was lower in areas of low understory density at pine-oak forests (11.17 ± 5.30 %) and gap areas (25.5 ± 2.39 %), compared to subtropical cloud forests (72.51 ± 0.60 %). The number of days to start the fruit removal was lower in the cloud and pine-oak forests with dense understory than in those with a sparse understory. We identified six mammal and three bird species as removers of P. hintonii fruits, among which Pecari tajacu and small mammals were the most important fruit removers. Conclusions: Low density understory in pine-oak favor less fruit removal of P. hintonii, probably associated with the behavior of its consumers.