Abstract: Introduction: intussusception is the most frequent cause of bowel obstruction in children under three years. Usually, after reduction, patients remain admitted for 24-48 hours. Ambulatory management has recently been proposed, based on clinical experience of follow-up of the patient's evolution in the Emergency Department of the hospital during the following 12 hours. Our objective is to evaluate the implementation of this new therapeutic attitude. Material and methods: retrospective review of all the intussusceptions treated at our center during the last 12 years. Results: 458 patients were included, 60.3% ot them were male. Mean age was 24.1 months (SD 24.6), with the ileo-colic location being the most frequent (77.7%). 2.4% had secondary causes. A pneumoenema was performed in 370 children, requiring surgery 10.7%. There were 78 relapses in 56 patients (12.2%), 15 of them during admission. The mean time to reintroduce feeding and the mean hospital stay was 28.6 and 64.4 hours respectively, with no significant difference between those who relapsed and those who did not (60.8 vs 69 hours, t = -0.4, p = 0.689). There was no relationship between a longer clinical evolution and pneumoenema succeed rate (t = 0.478, p = 0.634). Although there were differences in the need for surgical intervention (χ² = 5.604, p = 0.018), there were no complications. Early reintroduction of feeding was not related to any recurrences or differences between groups (30.2% in the relapsed group and 23.1% in the non-recurrent group, p = 0.608). Conclusions: hospital admission beyond 12 hours does not decrease the rate of complications. Therefore, we consider that outpatient observation for 12 hours after reduction is a safe and economical measure.

Resumen: Introducción: la invaginación intestinal es la causa más frecuente de obstrucción intestinal en menores de tres años. Habitualmente, tras la desinvaginación, los pacientes permanecen ingresados 24-48 horas. Recientemente se ha propuesto el manejo ambulatorio mediante observación clínica durante 12 horas. Nuestro objetivo es valorar la implementación de esta actitud terapéutica. Material y métodos: revisión retrospectiva de las invaginaciones intestinales atendidas en nuestro centro durante los últimos 12 años. Resultados: se incluye 458 pacientes, el 60,3% de ellos varones. Edad media de 24,1 meses, siendo la localización ileocólica la más frecuente (77,7%). El 2,4% presentó alguna causa secundaria. Se realizó neumoenema en 370 niños, requiriendo cirugía el 10,7%. Se registraron 78 recidivas en 56 pacientes (12,2%), 15 de ellos intrahospitalariamente. El tiempo medio para la reintroducción de la alimentación y la estancia media fueron de 28,6 y 64,4 horas respectivamente, sin diferencias significativas entre aquellos que recidivaron y los que no (60,8 frente a 69 horas; t = -0,4; p = 0,689). No se registraron diferencias entre el tiempo de evolución clínica y la tasa de éxito del neumoenema (t = 0,478; p = 0,634); aunque hubo diferencias en la necesidad de intervención quirúrgica (χ² = 5,604; p = 0,018), no hubo ninguna complicación. La reintroducción precoz de la alimentación no se relacionó con más recidivas ni diferencias entre los grupos (30,2% en el grupo que recidivó y 23,1% en el grupo sin recidiva, p = 0,608). Conclusiones: el ingreso hospitalario más allá de 12 horas no disminuye la tasa de complicaciones. Por tanto, consideramos que la observación en urgencias tras la desinvaginación durante 12 horas es una medida segura y coste-efectiva.

RESUMOA concretização do projeto da barragem do Alqueva, no sul de Portugal, resultou, desde 2006, em aumento importante de novas áreas irrigadas. Esse fato fez com que, nos últimos anos, ocorressem alterações progressivas da flora nos sistemas agrícolas da região do Alentejo. O presente trabalho analisou a vegetação espontânea, na fase inicial das alterações nos sistemas culturais, e o impacto dos fatores ambientais sobre a sua distribuição, em condições de clima mediterrâneo, na zona de influência do Alqueva. Esses estudos são importantes para delinear estratégias controle das infestantes nas culturas. Em 2007, foram realizados 105 levantamentos florísticos, em parcelas com culturas de outono-inverno ou outros modos de uso do solo, nas quais se identificaram 264 espécies. As famílias com maior expressão foram Asteraceae, Poaceae e Fabaceae. Somente três espécies foram identificadas em mais de metade das explorações: Avena sterilis, Lolium rigidum e Phalaris minor, as quais se encontram entre as 15 espécies que revelaram grau de infestação alto e muito alto. A textura do solo e o fósforo extraível foram determinados como fatores ecológicos ativos, segundo método dos perfis ecológicos e Informação Mútua. Assim, estes foram os factores com maior influência na distribuição das espécies. A distribuição de L. rigidum mostrou estar associada a solos de textura mediana, e de A. sterilis, também a solos de textura mediana e fina, não apresentando preferência ecológica pelo fósforo extraível. A distribuição de P. minor não mostrou relação com a textura do solo, mas revelou preferência por solos com teores médios de fósforo.

ABSTRACTThe conclusion of the dam project located in Alqueva, in Southern Portugal, has resulted in a significant increase of new irrigated areas, since 2006. This has meant that, in recent years, there have been progressive flora changes in farming systems traditionally implemented in the Alentejo region. The present work has analyzed the weed flora in an early stage of these changes, and the impact of environmental factors on the distribution of natural vegetation under Mediterranean climate conditions in the influence area of Alqueva. In 2007, 105 floristic surveys were carried out in autumn-winter crop plots or other soil use, and 264 species were identified. Families with higher expression were: Asteraceae, Poaceae, and Fabaceae. Only three species have been identified in more than half of farms, Avena sterilis, Phalaris minor and Lolium rigidum and they were part of the 15 species that revealed high and very high infestation degrees. Soil texture and extractable phosphorus have been determined as active ecological factors, according to the method of ecological profiles and Mutual Information. Therefore, these factores were those with the greatest influence on the species distribution. L.rigidum distribution showed to be associated with medium soil texture and A.sterilis distribution also showed to be associated with medium and fine soil texture soils, without showing ecological preference by extractable phosphorus. The distribution of P.minorwas not related to the soil texture but showed preference for soils with medium phosphorus content.

Ovary development and maturation of Nezara viridula (L.) were evaluated by examining ovariole morphology and the alterations in the biochemical (protein synthesis related to reproduction) composition of the hemolymph. Quantitative and qualitative protein analyses were performed and ovary structural alterations for the pre-reproductive and reproductive stages were recorded. Total concentration of proteins in female hemolymph gradually increased until the end of the pre-mating stage, remaining unaltered thereafter. Proteins linked to reproduction (vitellogenins) appeared in the hemolymph 10 days after adult emergence and indicated the end of the pre-mating stage. After mating, total protein concentration in the hemolymph was lower compared to virgin females; vitellogenin levels were similar during most of the observation period. Oocyte development and maturation were gradual and age dependent. Ten-day-old females had chorionated oocytes ready for fertilization. Mating did not stimulate oocyte development in N. viridula, but the lack of mating activity appeared to have stimulated oocyte resorption in 17-day-old females.

Os lepidópteros Platynota rostrana (Walker) (Tortricidae) e Phidotricha erigens Raganot (Pyralidae) têm sido constatados com freqüência nos pomares cítricos do Estado de São Paulo, nos últimos anos. O objetivo deste trabalho foi estudar a biologia das duas espécies, em condições de laboratório (temperatura 25 ± 2 °C, UR. 70 ± 10% e fotofase de 14 h) em dieta artificial, elaborar uma tabela de vida de fertilidade e descrever os danos causados no campo, devido ao desconhecimento destes aspectos biológicos dos referidos insetos no Brasil. A duração do ciclo biológico (ovo-adulto) de P. rostrana foi de 38,3 dias e a viabilidade total de 44,0%, enquanto para P. erigens foi de 32,5 dias e 63,6%, respectivamente. Ambas as espécies apresentaram cinco ínstares e as pupas de fêmeas foram mais pesadas do que as de machos. As fêmeas de P. rostrana colocaram, em média, 308 ovos e as de P. erigens 106 ovos. A longevidade de machos e fêmeas das duas espécies foi próxima de 10 dias. Pela tabela de vida de fertilidade concluiu-se que P. rostrana tem melhor desempenho em dieta artificial que P. erigens. É possível criar estas espécies em dieta artificial, facilitando o desenvolvimento de pesquisas relacionadas ao seu controle por métodos alternativos, caso elas assumam o status de pragas nos pomares de São Paulo.

The lepidopterans Platynota rostrana (Walker) (Tortricidae) and Phidotricha erigens Raganot (Pyralidae) have been found frequently in citrus groves in São Paulo State in recent years. Since in Brazil, the fertility cycle of these two species is largely unknown, as are details of the damage wrought by them in crops, this research studied these aspects of the two species, which were kept under laboratory conditions (temperature 25 ± 2 °C, 70 ± 10% RH, 14 h photophase) and on an artificial diet. The duration of the biological cycle (egg-adult) for P. rostrana was 38.3 days and total viability was 44.0%; for P. erigens these values were 32.5 days and 63.6%, respectively. Both species showed five larval instars. Females of P. rostrana laid an average of 308 eggs, whereas those of P. erigens laid an average of 106 eggs. In both species, female pupae were heavier than males. Male and female longevity for both species was nearly 10 days. Based on the data obtained, the artificial diet produced better results in P. rostrana than in P. erigens. If these species, which have the potential to reach pest status in the citrus groves of São Paulo State, could be reared on an artificial diet, research on their control by alternative methods would be easier.