Abstract BACKGROUND: The temporal-spatial coincidence of two or more benign, malignant or combined neoplasms that affect the same organ or tissue is what defines the collision tumor, with behavioral, genetic and histological differences. Ovarian collision tumors are a rare subtype. CLINICAL CASE: A 53-year-old patient, who came to the Emergency Department due to intermittent pain of seven months' evolution, which, in recent weeks, intensified and nausea and vomiting were added. During abdominal examination, an increase in volume was detected in the pelvic area, without peritoneal irritation. Tumor markers: CA-125, CA 19-9 and carcinoembryonic antigen were reported in normal parameters. Pelvic ultrasound reported the existence of a simple and complex cystic image, with a solid component. Pathological anatomy examination diagnosed: collision tumor in the left ovary. CONCLUSION: Collision tumors in the ovary are rare according to reports in the literature. A thorough pathological diagnosis and adequate clinical-radiological follow-up are necessary to rule out colliding tumors.

Resumen ANTECEDENTES: La coincidencia temporo-espacial de dos o más neoplasias benignas, malignas o combinadas, que afectan a un mismo órgano o tejido es lo que define al tumor de colisión, con diferencias conductuales, genéticas e histológicas. Los tumores de colisión ovárica son un subtipo raro. CASO CLÍNICO: Paciente de 53 años, que acudió al servicio de Urgencias debido a un dolor intermitente de siete meses de evolución que, en las últimas semanas, se intensificó y se agregaron náuseas y vómitos. Durante la exploración abdominal se detectó un aumento de volumen en el área pélvica, sin irritación peritoneal. Los marcadores tumorales: CA-125, CA 19-9 y antígeno carcinoembrionario se reportaron en parámetros normales. La ecografía pélvica informó la existencia de una imagen quística simple y compleja, con componente sólido. El examen de anatomía patológica diagnosticó: tumor de colisión en el ovario izquierdo. CONCLUSION: Los tumores de colisión en el ovario son poco frecuentes según lo reportado en la bibliografía. El diagnóstico anatomopatológico minucioso y el seguimiento clínico-radiológico adecuado son necesarios para descartar los tumores de colisión.

RESUMO JUSTIFICATIVA E OBJETIVOS: O objetivo deste estudo foi avaliar o efeito da técnica de mobilização neural em indivíduos com lombalgia crônica, assim como possíveis alterações na dor, no comportamento motor e na quantificação de citocinas antes e após o tratamento. MÉTODOS: Foram avaliados 16 indivíduos com idade média de 30,45±10,32 anos. A técnica consistiu em um total de 10 intervenções, com duração total de 10 minutos, divididas em quatro séries de 2 minutos cada, com intervalo de 30 segundos entre cada série. Os desfechos a seguir foram avaliados: intensidade da dor utilizando a escala analógica visual; mobilidade da coluna lombar com o terceiro dedo ao solo e goniometria do quadril; concentração de citocinas no soro com a técnica multiplex; e qualidade de vida com o Oswestry Disability Index, Roland-Morris Disability Questionnaire and the World Health Organization Quality of Life Questionnaire-bref. RESULTADOS: Os presentes resultados demonstraram uma redução na intensidade da dor de aproximadamente 70% entre as avaliações (p<0,001). Foram observadas melhoras na mobilidade lombar de aproximadamente 25,5% no teste do terceiro dedo ao solo (p<0,04) e nos ângulos da articulação do quadril (p<0,04). Também foi observada entre as avaliações diferença nas concentrações de citocinas, tanto pró-inflamatórias (p<0,009) quanto anti-inflamatórias (p<0,03). CONCLUSÃO: A técnica foi capaz de reduzir a intensidade da dor e consequentemente aumentar a mobilidade dos voluntários. Além disso, foi observada uma diferença na concentração de citocinas no final do tratamento e uma melhoria na qualidade de vida dos indivíduos.

ABSTRACT BACKGROUND AND OBJECTIVES: The objective of this study was to evaluate the effect of neural mobilization technique on individuals with chronic low back pain, as well as analyze possible changes in pain, motor behavior and on cytokine quantification before and after treatment. METHODS: Sixteen individuals with mean age of 30.45±10.32 years old were evaluated. The technique consisted of a total of 10 interventions, with a total duration of 10 minutes, divided into four series of 2 minutes each, with a 30-second interval between each series. The following outcomes were evaluated: pain intensity using the visual analog scale; mobility of the lumbar spine with the third finger to the ground test and hip goniometry; concentration of cytokines in serum with the multiplex technique; and quality of life with the Oswestry Disability Index, the Roland-Morris Disability Questionnaire and the World Health Organization Quality of Life Questionnaire-bref. RESULTS: Results showed a reduction in pain intensity of approximately 70% between the assessments (p<0.001). Improvements in lumbar mobility of approximately 25.5% on the third finger to the ground test (p<0.04) and improvement in the hip joint angles (p<0.04) were also observed. A difference in cytokine concentrations, both pro-inflammatory (p<0.009) and anti-inflammatory (p<0.03), was also observed between the assessments. CONCLUSION: The technique was able to reduce pain intensity and consequently increase the mobility of the volunteers. Additionally, a difference in cytokine concentration at the end of the treatment and an improvement in the individuals quality of life were observed.

ABSTRACT Background: Falls in the elderly are a major health problem. There are multiple experiences of intervention in primary care. Aim: To evaluate the impact of a multifactorial intervention in the prevention of falls in elderly people. To compare the differential effect of the practice of Tai Chi. Methods: Non-randomized before-after quasi-experimental design in an urban health center between the years 2014-2017. The study population was those over 65 years old with a high risk of falls. The intervention consisted of an individual assessment of risk factors: sensory problems, balance, orthostatic hypotension, treatments (psychotropic drugs, hypotensive drugs), barriers, technical aids. It was intervened in its correction. Tai Chi group participation is proposed. The dependent variables (baseline and year measurements) were Barthel, Unipodal Station Test (TEU), number of falls per year, Anxiety/Depression Goldberg Scale (EADG), number of medical consultations per year, walking aids, Daily Dose Defined of analgesics (DDD)/ year. The before-after analysis was performed using the Chi2 and T Student statistics for paired samples. Results: A total of 93 patients participated with an average age of 76±06,65, 84.9% women. Falls/year baseline 1.65±0.24; no significant differences between groups with or without Tai Chi in any baseline variable. At one year, average reduction of falls/year 0.53 (IC95% 0,07-0,99) (p=0.023), EADG anxiety 1.4±0.33 points (p<0.0001), EAGD depression 0.73±0.26 points (p=0.007). 44 patients practiced Tai Chi; finding: reduction of 1.88 (IC95% 0.90-2.80) points (p<0.0001) in EADG anxiety and 0.86 points (IC95% 0.12-1.60) (p=0.024) in EADG depression; 30.9% of patients abandoned technical aids (p<0.0001); 11% started psychotropic drugs. 49 patients did not practice Tai Chi; of them: EADG anxiety reduction of 1,020 points (IC95% 0.07-1.96) (p=0.035); 41.2% of patients initiated psychotropic drugs (p=0.001); none of the patients abandoned technical aids and 14.3% started them (p<0.001). Conclusions: The intervention reduced the number of falls, anxiety, the use of psychotropic drugs, depression, and the use of walking aids, with differential benefit of Tai Chi in these last three aspects.

RESUMEN Fundamentos: Las caídas en las personas mayores son un problema de salud de primer orden. Existen múltiples experiencias de intervención en atención primaria. El objetivo de este trabajo fue evaluar el impacto de una intervención multifactorial en prevención de caídas en personas mayores y comparar el efecto diferencial de practicar Tai Chi. Métodos: Diseño cuasiexperimental antes-después no aleatorizado en un centro de salud urbano entre los años 2014-2017. La población de estudio fueron los mayores de 65 años con alto riesgo de caídas. La intervención consistió en una valoración individual de factores de riesgo: problemas sensoriales, equilibrio, hipotensión ortostática, tratamientos (psicofármacos, hipotensores), barreras arquitectónicas, ayudas técnicas. Se intervino en su corrección. Se propone la participación en grupo de Tai Chi. Las variables dependientes (mediciones basal y al año) fueron: Índice de Barthel, Test Estación Unipodal (TEU), número de caídas/año, Escala Ansiedad/Depresión de Goldberg (EADG), número de consultas médicas/año, uso de ayudas para la marcha, Dosis Diaria Definida(DDD) analgésicos/año. Se realizó el análisis antes-después utilizando Chi2 y T Student para muestras apareadas. Resultados: Participaron un total de 93 pacientes, con una edad media de 76±6,65 años y un 84,90% mujeres. Número de Caídas/año basal 1,65±0,24; sin diferencias significativas entre grupos con/sin Tai Chi en ninguna variable inicial. Al año, reducción media de caídas/año a 0,53 (IC95% 0,07-0,99) (p=0.023), EADG ansiedad 1,40±0,33 puntos (p<0,0001), EADG depresión 0,73±0,26 puntos (p=0.007). Practicaron Tai Chi 44 pacientes, encontrándose: reducción de 1,88 (IC95% 0,90-2,80) puntos (p<0.0001) en EADG ansiedad y 0,86 puntos (IC95% 0,12-1,60) (p=0,024) en EADG depresión; 30,90% de pacientes abandonaron ayudas técnicas (p<0.0001); iniciaron psicofármacos 11%. No practicaron Tai Chi 49 pacientes, en ellos se redujo 1,02 puntos la EADG ansiedad (IC95% 0,07-1,96) (p=0,035); 41,20% de pacientes iniciaron psicofármacos (p=0,001); ningún paciente abandonó ayudas técnicas y 14,30% las iniciaron (p<0,001). Conclusiones: La intervención redujo las caídas, la ansiedad, el uso de los psicofármacos, la depresión, y el uso de ayudas para la marcha, con beneficio diferencial del Tai Chi en estos tres últimos aspectos.

ABSTRACT Background: Falls in the elderly are a major health problem. There are multiple experiences of intervention in primary care. Aim: To evaluate the impact of a multifactorial intervention in the prevention of falls in elderly people. To compare the differential effect of the practice of Tai Chi. Methods: Non-randomized before-after quasi-experimental design in an urban health center between the years 2014-2017. The study population was those over 65 years old with a high risk of falls. The intervention consisted of an individual assessment of risk factors: sensory problems, balance, orthostatic hypotension, treatments (psychotropic drugs, hypotensive drugs), barriers, technical aids. It was intervened in its correction. Tai Chi group participation is proposed. The dependent variables (baseline and year measurements) were Barthel, Unipodal Station Test (TEU), number of falls per year, Anxiety/Depression Goldberg Scale (EADG), number of medical consultations per year, walking aids, Daily Dose Defined of analgesics (DDD)/ year. The before-after analysis was performed using the Chi2 and T Student statistics for paired samples. Results: A total of 93 patients participated with an average age of 76±06,65, 84.9% women. Falls/year baseline 1.65±0.24; no significant differences between groups with or without Tai Chi in any baseline variable. At one year, average reduction of falls/year 0.53 (IC95% 0,07-0,99) (p=0.023), EADG anxiety 1.4±0.33 points (p<0.0001), EAGD depression 0.73±0.26 points (p=0.007). 44 patients practiced Tai Chi; finding: reduction of 1.88 (IC95% 0.90-2.80) points (p<0.0001) in EADG anxiety and 0.86 points (IC95% 0.12-1.60) (p=0.024) in EADG depression; 30.9% of patients abandoned technical aids (p<0.0001); 11% started psychotropic drugs. 49 patients did not practice Tai Chi; of them: EADG anxiety reduction of 1,020 points (IC95% 0.07-1.96) (p=0.035); 41.2% of patients initiated psychotropic drugs (p=0.001); none of the patients abandoned technical aids and 14.3% started them (p<0.001). Conclusions: The intervention reduced the number of falls, anxiety, the use of psychotropic drugs, depression, and the use of walking aids, with differential benefit of Tai Chi in these last three aspects.

RESUMEN Fundamentos: Las caídas en las personas mayores son un problema de salud de primer orden. Existen múltiples experiencias de intervención en atención primaria. El objetivo de este trabajo fue evaluar el impacto de una intervención multifactorial en prevención de caídas en personas mayores y comparar el efecto diferencial de practicar Tai Chi. Métodos: Diseño cuasiexperimental antes-después no aleatorizado en un centro de salud urbano entre los años 2014-2017. La población de estudio fueron los mayores de 65 años con alto riesgo de caídas. La intervención consistió en una valoración individual de factores de riesgo: problemas sensoriales, equilibrio, hipotensión ortostática, tratamientos (psicofármacos, hipotensores), barreras arquitectónicas, ayudas técnicas. Se intervino en su corrección. Se propone la participación en grupo de Tai Chi. Las variables dependientes (mediciones basal y al año) fueron: Índice de Barthel, Test Estación Unipodal (TEU), número de caídas/año, Escala Ansiedad/Depresión de Goldberg (EADG), número de consultas médicas/año, uso de ayudas para la marcha, Dosis Diaria Definida(DDD) analgésicos/año. Se realizó el análisis antes-después utilizando Chi2 y T Student para muestras apareadas. Resultados: Participaron un total de 93 pacientes, con una edad media de 76±6,65 años y un 84,90% mujeres. Número de Caídas/año basal 1,65±0,24; sin diferencias significativas entre grupos con/sin Tai Chi en ninguna variable inicial. Al año, reducción media de caídas/año a 0,53 (IC95% 0,07-0,99) (p=0.023), EADG ansiedad 1,40±0,33 puntos (p<0,0001), EADG depresión 0,73±0,26 puntos (p=0.007). Practicaron Tai Chi 44 pacientes, encontrándose: reducción de 1,88 (IC95% 0,90-2,80) puntos (p<0.0001) en EADG ansiedad y 0,86 puntos (IC95% 0,12-1,60) (p=0,024) en EADG depresión; 30,90% de pacientes abandonaron ayudas técnicas (p<0.0001); iniciaron psicofármacos 11%. No practicaron Tai Chi 49 pacientes, en ellos se redujo 1,02 puntos la EADG ansiedad (IC95% 0,07-1,96) (p=0,035); 41,20% de pacientes iniciaron psicofármacos (p=0,001); ningún paciente abandonó ayudas técnicas y 14,30% las iniciaron (p<0,001). Conclusiones: La intervención redujo las caídas, la ansiedad, el uso de los psicofármacos, la depresión, y el uso de ayudas para la marcha, con beneficio diferencial del Tai Chi en estos tres últimos aspectos.

La emergencia de leishmaniosis visceral zoonótica (LVZ) en América Latina es problema de salud pública en aumento. La urbanización de la LVZ es un fenómeno observado en diferentes países alrededor del mundo y hay un número creciente tanto de denuncias respecto a la aparición de esta infección en nuevas ubicaciones, como su aumento en zonas endémicas previamente establecidas. En la ciudad de Posadas, provincia de Misiones, nordeste de Argentina, la transmisión de LVZ asociada a canes y Lutzomyia longipalpis fue descrita por primera vez en 2006. En la ciudad de Puerto Iguazú, provincia de Misiones, el primer caso humano de LVZ tuvo lugar en febrero de 2014. De 209 perros muestreados, 15 (7.17%) resultaron positivos mediante métodos serológicos y/o parasitológicos. Se observó amplificación en 14 muestras y en todos los casos la especie implicada fue Leishmania infantum. Según nuestro conocimiento, esta es la primera caracterización molecular de L. infantum en perros procedentes de este área.

 The emergence of zoonotic visceral leishmaniasis (ZVL) in Latin America is a growing public health problem. The urbanization of ZVL has been observed in different countries around the world, and there are a growing number of reports drawing attention to the emergence of this infection in new locations, as well as its increase in previously established areas of endemicity. In the city of Posadas, Misiones province, Northeastern Argentina, the transmission of ZVL associated with canines and Lutzomyia longipalpis was first reported in 2006. In the city of Puerto Iguazú, also in Misiones province, the first human case of ZVL was reported in February 2014. From 209 surveyed dogs, 15 (7.17%) were identified as positive by serological and/or parasitological methods. Amplification was observed in 14 samples and in all cases the species implicated was Leishmania infantum. To the authors’ knowledge, this is the first molecular characterization of L. infantum from dogs in this area.

Arctiinae moths include nearly 11,000 species worldwide, of which approximately 700 species occur in the Brazilian Cerrado. The aim of this study was to describe the species composition of Arctiinae, as well as the variation in annual and nightly moth activity, in two Cerrado vegetation types. We sampled moths one night per month from September 2008 to June 2009, in the gallery forest and in the cerrado sensu stricto in the Jardim Botânico de Brasília. We collected 395 tiger moths belonging to 65 morphospecies; 74% of the species belonged to the tribe Arctiini and 26% to Lithosiini. Thirty-one species (47.7%) occurred only in the gallery forest, 13 (20%) occurred only in the cerrado sensu stricto, and 21 (32.3%) occurred in both vegetation types. Additionally, we found the greatest species richness between 7:00 p.m. and 8:00 p.m., and these hours were associated with 21 and 22 species, respectively. Most species (51.8%) were active for up to three hours during the night. In general, the species composition differed between the dry and rainy seasons, and the similarity of the fauna also varied hourly. Based on our results, we suggest that rapid inventories of Arctiinae be performed in both rainy and dry seasons, and sampling should be carried out the entire night.

O presente artigo relata as características geológicas, litológicas e petrográficas do dique piroclástico e tufo soldado intrusivo com alto teor de fenocristais e fragmentos de minerais do complexo intrusivo de rochas alcalinas do Morro dos Gatos, RJ. Este complexo intrusivo tem 1,2 km x 0,8 km de extensão ocupando uma área de 0,5 km², e é constituído, principalmente, por monzonito e traquito. Na encosta sul do morro, ocorre um dique composto de rocha piroclástica e, na encosta noroeste, tufo soldado intrusivo com alto teor de fenocristais e fragmentos de minerais. O dique piroclástico é de 40 a 80 cm de largura, é intrusivo no granito porfirítico do embasamento e é constituído por tufo-brecha fortemente soldado, que contém fragmentos angulosos de traquito de tamanho de lapilli. Ao longo do plano de contato do dique piroclástico, ocorre a intercalação do traquito. Por outro lado, o tufo soldado é caracterizado por abundância de fenocristais de feldspato alcalino e fragmentos de minerais de feldspato alcalino, quartzo, biotita, anfibólio e fragmentos líticos de traquito, apresentando textura suportada por cristais e matriz. Os fenocristais grandes são os agregados compostos de feldspato alcalino idiomórfico com o tamanho geral de 2 mm, no máximo de 6 mm. A matriz é constituída, principalmente, por fragmentos de minerais de tamanho geral menor do que 1 mm. O diagrama de distribuição entre o tamanho e a frequência, para os fragmentos, sugere que estes foram originados de uma erupção explosiva. A matriz é fortemente soldada e completamente devitrificada, apresentando textura criptocristalina. Os cristais foram concentrados pela seleção granulométrica por gás vulcânico em ascensão no conduto subvulcânico durante a fase de erupção contínua e efusiva. A distribuição espacial limitada das rochas piroclásticas e o tamanho pequeno do afloramento, indicam que essas não são constituintes de fluxo piroclástico, mas de conduto e fissura subvulcânicos.

The present article reports the geologic, lithologic, and petrographic characteristics of the pyroclastic dyke and phenocryst-rich welded crystal tuff of the Morro dos Gatos alkaline intrusive body, State of Rio de Janeiro, Brazil. The intrusive complex has an extension of 1.2 x 0.8 km occupying an area of 0.5 km². It is constituted mainly by monzonite and trachyte. At the south flank of the massif, there exits a pyroclastic dyke and at the northwest flank, an intrusive welded crystal tuff. The pyroclastic dyke is 40 to 80 cm wide and intrudes into the basement porphyritic granite. This rock is constituted by welded tuff breccia with large amount of lapilli-size angular lithic fragments of trachyte. Along the contact plane of this dyke, there is an intercalation of the trachyte. The crystal tuff is characterised by abundant alkaline feldspar phenocrysts and mineral fragments of alkaline feldspar, quartz, biotite, and amphibole, showing a crystal matrix-supported texture. Large phenocrysts are aggregations of idiomorphic alkaline feldspar crystals with a general size of 2 mm and a maximum one of 6 mm. The matrix is composed mainly of mineral fragments of less than 1 mm in general size. The size-frequency diagram for the mineral fragments suggests that they have been originated from an explosive eruption. The matrix is strongly welded and completely devitrified showing a cryptocrystalline texture. The crystals were concentrated by sorting with the help of the volcanic gas ascending in the volcanic conduit during a continuous and effusive phase of the eruption. The limited special distribution of the pyroclastic rocks and small outcrop size indicate that they are not constituent of pyroclastic flow deposits, but of subvolcanic conduit and fissure.

The first case of visceral leishmaniasis (VL) in Argentina was reported in 2006 in Posadas, Misiones. During the summer 2008-2009 Lutzomyia longipalpis, the VL vector, and canine VL cases were already spread along the province of Corrientes. In order to know the distribution of VL risk, systematic captures of the vector were performed between February and March 2010, in 18 areas of the provinces of Entre Ríos and Corrientes, and the city of Puerto Iguazú, Misiones, with a total of 313 traps/night. We confirmed the presence of Lu. longipalpis, for the first time in Chajarí (Entre Ríos), Alvear, La Cruz, Curuzú Cuatiá and Bella Vista (Corrientes), and Puerto Iguazú (Misiones). In Santo Tome and Monte Caseros (Corrientes), where the vector had been previously reported, traps with more samples were obtained with 830 and 126 Lu. Longipalpis trap/site/night respectively. These results show that the vector of urban VL continues spreading in the Argentine territory. Simultaneously, the spread of the parasite and the resulting human VL cases are associated with the dispersion of reservoirs, infected dogs, with or without clinical symptoms or signs, due to human transit.

El primer caso autóctono de leishmaniasis visceral (LV) en la Argentina se notificó en el año 2006 en Posadas, Misiones, y en el verano 2008-2009 se comprobó la dispersión del vector de LV, Lutzomyia longipalpis y casos de LV canina en la provincia de Corrientes. Para conocer la distribución del riesgo, entre febrero y marzo del 2010 se realizó la búsqueda sistemática del vector de LV en 18 localidades de las provincias de Entre Ríos, Corrientes y en la ciudad de Puerto Iguazú, Misiones, totalizando 313 trampas/noche. Se comprobó la presencia de Lu. longipalpis, por primera vez, en las localidades de Chajarí (Entre Ríos), Alvear, La Cruz, Curuzú Cuatiá y Bella Vista (Corrientes), y en Puerto Iguazú (Misiones). En Santo Tomé y Monte Caseros (Corrientes) se volvió a registrar la presencia del vector, y se obtuvieron las trampas con más ejemplares, 830 y 126 Lu. longipalpis trampa/sitio/noche respectivamente. Los resultados muestran que el vector de la LV urbana, continúa dispersándose en el territorio argentino. Simultáneamente, la propagación del parásito, y los consecuentes casos de LV humana se asocian al aumento de reservorios, perros infectados con o sin clínica, debidos al tránsito humano.

The nesting behavior of Centris (Hemisiella) vittata Lepeletier was studied in the Urbano Santos Cerrado in the northeast of Maranhão State, Brazil. To date, this species has only been studied in trap-nests. The nesting behavior of this species in a natural condition is recorded for the first time. Nesting occurred in preexisting holes in dead trunks of aroeira, Astronium myracrodruon (Anacardiaceae), at the end of the rainy season. The cells were constructed with a mixture of sand and oil. After finishing the nests, females used only oil to line the entrance wall. Two females collected sand at the same time to build their nests, and another one was seen collecting resources at Byrsonima sp. (Malpighiaceae). The pollen load of one bee was analyzed and was found to contain mainly Hymenaea courbaril (Leg-Caesalpiniaceae). Development from egg to adult took about 60 days. Protandry was observed, being males smaller than females. The nests were parasitized by Coleoptera and Diptera. However, the females only showed aggressive behavior against females of the same species or genus.

As abelhas da subtribo Euglossina são importantes elementos da fauna neotropical, ocorrendo em maior diversidade em floresta tropical que em área de restinga. Essas abelhas são responsáveis pela polinização de inúmeras espécies de plantas, sendo consideradas boas indicadoras das condições ambientais. De fevereiro/2005 a janeiro/2006 foram coletados 429 indivíduos pertencentes a três gêneros [Euglossa (Latreille), Eulaema (Lepeletier) e Eufriesea (Cockerell)] e 14 espécies. As espécies mais frequentes foram Eulaema cingulata (Fabricius) (24,5%), Euglossa cordata (L.) (20,5%) e Eufriesea nigrescens (Friese) (19,8%), constituindo 64,8% dos indivíduos. Pluviosidade foi a variável ambiental que teve maior importância relativa sobre a variação da composição de espécies, pelo menos para algumas espécies de Eufriesea. Eg. cordata e Eg. gaianii Dressler nidifi caram em ninhos armadilhas colocados na área, o que sugere que são espécies residentes. A grande abundância e riqueza de espécies, quando comparadas a outros trabalhos, podem ser devidas ao mosaico de distintas formações vegetais encontrado nas áreas adjacentes ao sítio específico de coleta.

The bees of subtribe Euglossina are an important component of neotropical fauna and have greater species diversity in tropical forests than in spits. They play an important role in the pollination of several plant species and are considered good indicators of environmental conditions. From February 2005 to January 2006, a total of 429 specimens belonging to three genera [Euglossa (Latreille), Eulaema (Lepeletier) and Eufriesea (Cockerell)] and 14 species were collected. Eulaema cingulata (Fabricius) (24.5%), Euglossa cordata (L.) (20.5%) and Eufriesea nigrescens (Friese) (19.8%) were the most abundant species, representing 64.8% of all bees collected. Rainfall was the environmental variable with the greatest relative influence on species composition, particularly for some species of Eufriesea. Euglossa cordata and Eg. gaianii Dressler nested in trap nests, suggesting they are resident species. The larger number of individuals and greater richness of species compared with data available in the literature may result from the great variety of plant species found in the areas adjacent to the collection site.

Every change generates a crisis and the change of authorities also represents a situation with several facts that interact among them, having a lasting effect in the whole Educational Community placed in that structure and organization. Any modification affects its identity, the way of thinking and acting, having a positive advance from the crisis situations, or if not having regression and separation components .This work deals with the change of authorities in a Work Training Center in the Province of Jujuy. In this kind of Education Institutions team work means that each one of the members of the Educational Community cannot be replaced, due to its specific role and that is why a change of authorities will obviously demand a readaptation of all its members. We shall research on the following analysis categories: a) Institution with its constituting components; b) Institutional Educational Project, change and crisis; c) Adaptation, redesigning and identity. The methodology employed is comprehensive, searching for interpretation, thinking and understanding of fixed space-time situations. We made an approach and an analysis of the beginning of this new process and its development during the school year 2005, knowing that the results will only be seen after some time of the new management work.

Todo cambio genera una crisis y uno de autoridades representa también una situación con múltiples factores que interactúan entre sí, afectando en su conjunto a toda la Comunidad Educativa que está inserta en esa estructura y organización. Cualquier modificación afecta su identidad, la forma de pensar y la de actuar, desembocando las situaciones de crisis en avances positivos, o bien en estancamientos regresivos y disgregación. Este trabajo indaga sobre el cambio de autoridades en un Centro de Formación Ocupacional del interior de la Provincia de Jujuy. En este tipo de Instituciones Educativas el trabajo en equipo implica que cada uno de los integrantes de la Comunidad Educativa es parte irremplazable, puesto que cumple un rol específico y por ello es que este cambio de autoridades exigirá indefectiblemente una readaptación de todos los integrantes. Las Categorías de análisis que nos propondremos indagar son: a) Institución con sus componentes constitutivos; b) Proyecto Educativo Institucional, cambio y crisis; c) Adaptación, reformulación e identidad. La Metodología empleada es comprensivista, buscando la interpretación, reflexión y entendimiento de situaciones espacio - temporales determinadas. Realizamos un acercamiento y análisis del inicio de este nuevo proceso y su desarrollo durante el ciclo lectivo 2005, sabiendo que los resultados sólo serán visibles con el correr del tiempo de la nueva gestión.

As abelhas pertencentes à tribo Centridini possuem distribuição neotropical e são consideradas os principais polinizadores de diversas espécies vegetais em diferentes biomas. Apesar disso, dados sobre a biologia da maioria das espécies ainda são escassos. Este trabalho relata observações sobre a biologia de Centris (Ptilotopus) maranhensis Ducke, 1910, uma espécie que ocorre no Nordeste do Brasil. O estudo foi conduzido em uma área de cerrado no Estado do Maranhão durante o período de atividade dos adultos. Fêmeas foram observadas nidificando em termiteiros epígeos e em visita às flores de Byrsonima umbellata Mart. (Malpighiaceae) para coleta de óleo. O comportamento foi registrado diretamente e através de filmagens. Os ninhos foram escavados, raspando-se o substrato até as células serem encontradas. Um ninho completo foi aberto para exame das estruturas internas e análise do conteúdo das células. A estrutura geral apresentava um túnel principal com células descendentes dispostas linearmente. Foram encontradas células (n = 5) com larvas em diferentes estágios de desenvolvimento e uma massa de pólen de consistência firme e pastosa formada por uma grande quantidade de grãos de Byrsonima.

The bees belonging to the tribe Centridini possess distribution neotropical and are considered the main pollinators of different plant species in different biomas. Despite of this the biology data of the majority of species remain scarce. This work is about observations of biology of Centris (Ptilotopus) maranhensis Ducke, 1910, specie that occurs in the Northeast of Brazil. The study was made in a cerrado area in the State of Maranhão during a period of adult activity. Females were seen nesting at epigeous termite nests and visiting Byrsonima umbellata Mart. (Malpighiaceae) flowers for oil collection. The behavior was directly registered and shooted. The nests were excavated being scraped the substratum until the cells were found. A complete nest was opened for examination of the internal structures and analysis of cells content. The general structure presented a main tunnel with cells descending linearly. Cells (n = 5) with larvae in different periods of development were found. A firmly pollen paste was seen where a huge Byrsonima grains was verified.

Fêmeas de Centris vittata Lepeletier foram observadas visitando flores de Byrsonima sp. e nidificando em troncos de Astronium sp. (Anacardiaceae) em uma área de Mata Mesofítica, em Urbano Santos (3º 12' 28''S; 43º24'12''), Maranhão, Brasil.

Females of Centris (Hemisiella) vittata Lepeletier were observed visiting flowers of Byrsonima sp. (Malpighiaceae) and nesting in Astronium sp. (Anacardiaceae) in a mesophytic forest area at Urbano Santos, Maranhão, Northeastern Brazil.

Os Centridini compreendem cerca de 176 espécies distribuídas principalmente nas regiões tropicais da América. Mesmo considerados polinizadores-chave na manutenção de muitas espécies vegetais, dados sobre sua bionomia são ainda restritos. Há relatos sobre a nidificação de 11 espécies, das 21 diagnosticadas como polinizadoras do murici, Byrsonima crassifolia L. Kunth, uma espécie valiosa para o biomonitoramento. Um estudo da biologia de nidificação de Centris flavifrons (Friese) foi conduzido no Maranhão durante o período de atividade dos adultos (maio a dezembro). Os ninhos estavam agregados. As fêmeas escavaram seus ninhos em solo plano e compactado. Quinze ninhos ativos foram escavados, sendo que em apenas seis foram encontradas células. O túnel era simples, sem ramificações, com uma única célula na sua porção terminal, situada entre 25 cm e 50 cm de profundidade. Foi observada atividade noturna na construção dos ninhos. A análise polínica do aprovisionamento de quatro células permitiu identificar 23 espécies florais, das quais seis espécies de Malpighiaceae. Foram registradas seis espécies florais que ainda não haviam sido encontradas visitando C. flavifrons: Lecythis lurida (Miers) Mori, Hymenea courbaril L., Myrcea sp., Protium sp., Tetrapterys sp. e Thalisia sp.

The Centridini has almost 176 species distributed mainly in the tropic regions of America. Although they are considered key pollinators in the maintenance of many vegetal species, data about their bionomics are restrict. Nesting activity is known for 11 species, out of the 21 that are considered pollinators of murici, Byrsonima crassifolia L. Kunth, a valuable biomonitoring specie. A study of the nesting biology of Centris flavifrons (Friese) was conducted in the state of Maranhão, Brazil, during the active period of the adults (May through December). Nests were aggregated. The females excavated their nests on flat surfaces of hard soils. Fifteen nests were dug and we only found cells in six of them. The nests architecture consisted of a single unbranched tunnel, with only one cell in the vertical position at the end, which was 25 cm to 50 cm away from the entrance. Nocturnal activity was observed in the nests building. The pollen analysis of the contents of four cells allowed to identify 23 floral species, six of them Malpighiaceae. Six floral species were registered visiting C. flavifrons by the first time: Lecythis lurida (Miers) Mori, Hymenea courbaril L., Myrcea sp., Protium sp., Tetrapterys sp. and Thalisia sp.

Seven nests of Melitoma segmentaria found in Uberlândia (18º 55' 23" S; 48º 17' 9" W; altitude 854 m) in a termite nest within one of the University of Uberlândia farms, were studied. The nest position, construction, and number of cells are given. The parasite Anthrax Iuctuosus (Bombylidae), that infested 13% of the cells.