Primeros registros de mosquitos (Diptera: Culicidae) de la provincia de Misiones, Argentina

The following species represent first records for Argentina: Culex (Anoedioporpa) canaanensis Lane & Withman, Culex (Anoedioporpa) originator Gordon & Evans, Culex (Culex) declarator Dyar & Knab, Culex (Melanoconion) ribeirensis Forattini & Sallum, Culex (Microculex) neglectus Lutz, Culex (Microculex) pleuristriatus Theobald, Orthopodomyia fascipes (Coquillett) and Wyeomyia (Wyeomyia) medioalbipes Lutz. The species Anopheles (Nyssorhynchus) guarani Shannon and Ochlerotatus (Ochlerotatus) rhyacophilus (Da Costa Lima), recorded for Argentina, were recently resurrected from the synonymy of Anopheles (Nyssorhynchus) lutzii Cruz and Ochlerotatus (Ochlerotatus) scapularis (Rondani). The following species represent the first report for Misiones Province: Anopheles (Anopheles) neomaculipalpus Curry, Coquillettidia (Rhynchotaenia) fasciolata (Lynch Arribálzaga), Culex (Culex) acharistus Root, Culex (Culex) tatoi Casal & García, Culex (Culex) usquatus Dyar. With these new records the number of mosquito species for Misiones Province increases to 189 while for Argentina to 242.Las siguientes especies representan el primer registro de la Argentina: Culex (Anoedioporpa) canaanensis Lane & Withman, Culex (Anoedioporpa) originator Gordon & Evans, Culex (Culex) declarator Dyar & Knab, Culex (Melanoconion) ribeirensis Forattini & Sallum, Culex (Microculex) neglectus Lutz, Culex (Microculex) pleuristriatus Lutz, Orthopodomyia fascipes Coquillett y Wyeomyia (Wyeomyia) medioalbipes Lutz. Las especies Anopheles (Nyssorhynchus) guarani Shannon y Ochlerotatus (Ochlerotatus) rhyacophilus (Da Costa Lima) fueron recientemente rescatadas de la sinonimia de Anopheles (Nyssorhynchus) lutzii Cruz y Ochlerotatus (Ochlerotatus) scapularis (Rondani). Las siguientes especies corresponden a nuevos registros de la provincia de Misiones: Anopheles (Anopheles) neomaculipalpus Curry, Coquillettidia (Rhynchotaenia) fasciolata (Lynch Arribalzaga), Culex (Culex) acharistus Root, Culex (Culex) tatoi Casal & García, Culex (Culex) usquatus Dyar y Toxorhynchites (Lynchiella) guadeloupensis (Dyar & Knab). Con estos nuevos registros el número de especies citadas se eleva a 189 de la provincia de Misiones y 242 de Argentina.Fil: Rossi, Gustavo Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); ArgentinaFil: Lestani, Eduardo Ariel. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentin

El desafío de publicar más y mejor

La motivación para escribir esta reseña nace con la creación del Instituto de Investigación sobre Producción Agropecuaria, Ambiente y Salud (IIPAAS) en la Facultad de Ciencias Agrarias de la UNLZ, hecho que aconteció el 25 de Agosto del 2015 por Resolución CAA/146. El IIPAAS se proyectó como un instituto interdisciplinario que promueve las interacciones entre los grupos de investigación vinculados a nuestra Facultad. La primera meta institucional fue su postulación como Centro Asociado a la Comisión de Investigaciones Científicas bonaerense (CIC) como estrategia para fortalecer las actividades de investigación y vincularse de manera directa con un organismo gubernamental de ciencia y técnica. En 2016, el IIPAAS calificó dentro de los 29 nuevos Centros Asociados a la CIC, junto a dos Institutos de la Facultad de Ingeniería, UNLZ (Ingeniería Industrial y Tecnología y Educación).Durante este proceso, se generó un espacio de recopilación de información, reflexión e introspección acerca del conocimiento científico y tecnológico generado en nuestra institución, las formas de difusión de dicho conocimiento a la sociedad, y la valoración que el sistema científico y tecnológico le otorga a las publicaciones como indicador de productividad. Como resultado del análisis, se identificaron fortalezas, oportunidades de mejora y áreas de vacancia que el IIPAAS y la FCA-UNLZ están llamados a atender. Esperamos que esta reseña sirva como línea de base y punto de partida para futuros análisis multidimensionales, más completos y exhaustivos, acerca del desafío de publicar más y mejor.Fil: Rondanini, Deborah Paola. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Lomas de Zamora. Facultad de Ciencias Agrarias; ArgentinaFil: Lopez, Cesar Gabriel. Universidad Nacional de Lomas de Zamora. Facultad de Ciencias Agrarias; ArgentinaFil: Greizerstein, Eduardo Jose. Universidad Nacional de Lomas de Zamora. Facultad de Ciencias Agrarias; ArgentinaFil: Rossi, Carlos Alberto. Universidad Nacional de Lomas de Zamora. Facultad de Ciencias Agrarias; Argentin

Incipient loss of flagella in the genus Geolegnia: the emergence of a new clade within Leptolegnia?

The genus Geolegnia represents a poorly documented group of saprolegnialean oomycetes isolated from soils as free-living organisms. Although it is morphologically similar to the facultative parasitic genus Leptolegnia, Geolegnia presents the uncommon property of having lost a flagellate stage in its lifecycle. Based on ITS and large subunit (LSU) rRNA sequence data, we show Geolegnia to be basal to Leptolegnia, and also introduce Geolegnia helicoides sp. nov. Using sequence data of Leptolegnia available in GenBank, supplemented by data derived from culture collections, we show that Geolegnia is nested within Leptolegnia, a genus characterised by its “conventional” biflagellate life cycle. The emergence of Geolegnia is therefore seen as a recent event, and we suggest here an evolutionary context where this loss might have been advantageous. Based on this study, Leptolegnia remains paraphyletic, awaiting the redefinition of genera in this complex.Instituto de Botánica "Dr. Carlos Spegazzini"Centro de Estudios Parasitológicos y de Vectore

Primary Perianal Malignant Melanoma in a Dog - Combination Therapy

Background: Melanocytic neoplasm can arise from melanocytes in any location of the body. Malignant melanoma (MM) has a poor prognosis in dogs and presence of lymphvascular invasion, distant metastasis, or mitotic activity present prognostic value. Primary melanoma affecting the gastrointestinal tract has been rarely reported in veterinary literature, thus the prognosis affecting gastrointestinal tract is unknown. Electrochemotherapy (ECT) is an effective local treatment which combines chemotherapeutic drugs mainly bleomycin or cisplatin followed by the delivery of permeabilizing electrical pulses However, other hydrophilic drugs seem to present an increase cytotoxic effect such as carboplatin.Case: A 9-year-old mixed-breed neutered dog was referred to a private clinic with a mass in the perianal region diagnosed as perianal melanoma. No metastasis was observed on abdominal ultrasound nor chest x-ray (3 views). Clinical signs noted were tenesmus, hemorrhagic discharge, weight loss and hyporexia. Considering the tumor volume (16.0 x 10.0 cm), a neoadjuvant ECT session was proposed. The authors opted for carboplatin (300 mg/m², intravenously), administered over 20 min and cisplatin intratumorally (1 mg/cm³, equivalent to 1 mL/1cm³; total volume 20 mL) administered in the upper parts of the mass that could be reached while avoiding drug leakage. After administration, sequences of eight biphasic pulses, (100 microseconds), with a voltage ranging from 650-1,000V/cm (pulse generator Onkodisruptor®) using a hexagonal/single pair and plate electrode were delivered. At day 30th, a partial response was observed accordingly to RECIST system, with tumor size of 5.0 x 5.0 cm (65.4 cm³). A second ECT session was performed with the same previous protocol, but with a decreased dosage of carboplatin (240 mg/m² consistent with 20% reduction) due to adverse effects in the first session, resulting in stable disease at day 60th (30 days after second ECT). Then, we proposed a surgical excision of the mass including partial resection of ventral rectum with intraoperative ECT. Afterwards, it was observed fecal incontinence that did not resolved after time but did not significant cause a morbidity in the patient. Patient achieved a disease-free interval (DFI) of 700 days and survival time of 730 days. Unfortunately, patient died due to distant metastasis.Discussion: Surgery is still the cornerstone treatment for MM in dogs, regardless anatomic site. However, in perianal region, wide or radical local surgical excision is a challenge due to anatomic region which precluded most of the time to achieve complete margins. In this report, the origin of the tumors was not defined since no normal tissue was found surrounding tumors cells probably due to tumor invasion and destruction of surrounding tissue. Thus, based on the previous literature, this tumor could have been arisen from rectum wall or anal sac. The longer DFI and survival time from this patient is superior from the most veterinary cases in literature which combined different types of treatment such as surgery, chemotherapy, immunotherapy, palliative care or ECT. Neoadjuvant ECT leaded to a reliable approach for partial remission in order to perform a better surgical approach in this case report. To conclude, ECT may be an option for partial remission and local control in regions which anatomic limitation is a challenge for wide excision.Keywords: bleomycin, carboplatin, cisplatin, electroporation, melanocytic tumor

Contributions to social security in Argentina, Chile and Uruguay: densities, transitions and duration

Los programas de pensiones latinoamericanos tienen baja cobertura. Utilizando paneles de registros administrativos de Argentina, Chile y Uruguay, caracterizamos las historias de contribución de la población. Construimos tres indicadores: densidad de cotización, tasas de transición y duración de los períodos de contribución y no contribución. Los datos obtenidos son preocupantes. La densidad de cotización promedio es baja y bastante heterogénea a través de la población. Los períodos de contribución son cortos y las interrupciones frecuentes. Las tasas de transición son altas a edades tempranas y tienden a caer a lo largo de la vida, indicando gran rotación entre los jóvenes.Pension programs in Latin America have low coverage. We use large panel databases coming from administrative records of Argentina, Chile and Uruguay to characterize the histories of contribution of the population. We compute three indicators: density of contribution, transition rates and duration of the spells of contribution and no contribution. The picture that emerges is worrisome. The density of contributions is low on average and pretty heterogeneous across the population. The spells of contribution are short and interruptions are frequent. Transition rates are higher at early ages and tend to decline later in life, indicating high turnover among young individuals.Instituto de Investigaciones Económica

Updated Anopheles mosquitos abundance and distribution in north-eastern malaria-free area of Argentina

Malaria is the most important parasitic disease worldwide. In 2019, more than 679,441 cases of malaria were reported in the American region. During this study, Argentina was in malaria pre-elimination autochthonous transmission phase with the aim of being declared as malaria-free country. The aim of this work was to assess the influence of remote sensing spectral indices (NDVI, NDWI) and climatic variables (temperature, relative humidity and precipitation) on the distribution and abundance of Anopheles mosquitoes, in four localities with different degrees of anthropogenic disturbance and with previous malaria cases records located , in a historical malarious area in northeastern of Argentina. Between June 2012 and July 2014, mosquitoes were collected. We collected 535 Anopheles adult mosquitoes. Anopheles strodei s.l. was the most abundant species. The greatest richness, diversity and abundance of species were registered in wild and semi-urban environments. The abundance of Anopheles presented a negative association with relative humidity and mean temperature, but positive with mean maximum temperature. The most important variables determining Anopheles total abundance and distribution were NDWI Index and distance to vegetation. The abundance of An. strodei s.l., was positive associated with water areas whereas the NDVI Index was negatively associated.Fil: Stein, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Instituto de Medicina Regional. Área de Entomología; Argentina. Ministerio de Salud de la Nación; ArgentinaFil: Martín, Mía Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaFil: Ramirez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas, Naturales y Agrimensura. Departamento de Biología; ArgentinaFil: Etchepare, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional. Facultad Regional de Concordia; ArgentinaFil: Oria, Griselda Ines. Universidad Nacional del Nordeste. Instituto de Medicina Regional. Área de Entomología; ArgentinaFil: Rossi, Gustavo Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Kuruc, Jorge. Ministerio de Salud de la Nación; ArgentinaFil: Estallo, Elizabet Lilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentin

Natural forests mortality modelling.

As florestas naturais são ecossistemas complexos para os quais freqüentemente não existem dados e métodos adequados para a descrição do comportamento de modelos de crescimento e produção. O recrutamento, o crescimento e a mortalidade são os três componentes básicos para a modelagem de uma floresta. Neste trabalho, o objetivo foi fornecer uma visão geral da modelagem da mortalidade aplicada em florestas naturais. A revisão apresenta aspectos gerais da ocorrência, causas e tipos de mortalidade que ocorrem em florestas; a obtenção de dados e estimativa da mortalidade a partir de inventários; os valores das taxas de mortalidade em diferentes florestas naturais; as maneiras de abordar a modelagem dos dados, os tipos de funções e as variáveis comumente empregadas para modelar a morte de árvores; e as formas como os diferentes modelos e sistemas empregam essas funções para simulação do crescimento e produção florestal.Natural forests are very complex ecosystems, for which frequently there are no data and adequate methods to describe growth and yield behaviour. Mortality, growth and recruitment are the basic components for forest modelling. The main objective of this paper is to provide a general overview of natural forest mortality modelling. It presents some aspects of the general occurrence, the mortality causes and types present in forests, the data acquisition and estimates based on forest inventories, the mortality rate values for different natural forests, the modelling approaches of mortality data, the functions and variables most commonly used, as well as how different models and systems use these functions for modelling growth and forest production

Forests recruitment modelling

As florestas são compostas por árvores de muitas espécies, de tamanhos diferentes, com variadas e indeterminadas idades e crescendo sobre distintas condições ambientais. Esse cenário faz com que seja necessária a busca por técnicas adequadas para a modelagem da dinâmica e da produção dessas florestas. A dinâmica das florestas é basicamente formada pelos componentes crescimento, mortalidade e recrutamento. Esses três componentes são fundamentais para a modelagem e subseqüente simulação e projeção do crescimento e da produção da floresta em longo prazo. O recrutamento é o evento no qual o tamanho (diâmetro ou altura) de uma árvore alcança uma dimensão mínima de medição, ou seja, é o ingresso na menor classe considerada. O objetivo deste trabalho foi apresentar alguns aspectos gerais da modelagem do recrutamento em florestas. A revisão mostra as definições de recrutamento; os aspectos ambientais da ocorrência do evento; as maneiras de obtenção de dados de recrutamento; as taxas obtidas em diferentes tipos florestais; as distintas formas de abordagem da modelagem do componente; as funções, variáveis e tipos de modelos mais comumente utilizados; e exemplos de modelos e sistemas que incluem o recrutamento na modelagem da produção e da dinâmica florestal.Forests are composed of trees of several species of different sizes, multiple and undetermined ages, growing under distinct environmental conditions. These circumstances make necessary the search for adequate techniques for modelling forest dynamics and yield. Forest dynamics are basically formed by three components: recruitment, growth, and mortality. These components are essentials for modelling the forthcoming steps of simulation, growth and yield prediction. Recruitment may be defined as the event on which the tree size (diameter or height) reaches determined value during measurements intervals. The main objective of this paper is to present the general guidelines for modelling forests recruitments. The literature review presents the definitions for recruitment, environmental traits of the event occurrence, the way recruitment data are obtained, the rates of recruitment under different forests situations, the most common modelling approaches for recruitment, the functions, variables and models types most commonly used and some examples of systems and models, which include recruitment, aiming at modelling forest yield and dynamics