Membrane vesicles in Acidithiobacillia class extreme acidophiles: influence on collective behaviors of 'Fervidacidithiobacillus caldus'.

Membrane vesicles (MVs) are envelope-derived extracellular sacs that perform a broad diversity of physiological functions in bacteria. While considerably studied in pathogenic microorganisms, the roles, relevance, and biotechnological potential of MVs from environmental bacteria are less well established. Acidithiobacillaceae family bacteria are active players in the sulfur and iron biogeochemical cycles in extremely acidic environments and drivers of the leaching of mineral ores contributing to acid rock/mine drainage (ARD/AMD) and industrial bioleaching. One key aspect of such a role is the ability of these bacteria to tightly interact with the mineral surfaces and extract electrons and nutrients to support their chemolithotrophic metabolism. Despite recent advances in the characterization of acidithiobacilli biofilms and extracellular matrix (ECM) components, our understanding of its architectural and mechanistic aspects remains scant. Using different microscopy techniques and nano-tracking analysis we show that vesiculation is a common phenomenon in distant members of the Acidithiobacillaceae family, and further explore the role of MVs in multicellular colonization behaviors using 'Fervidacidithiobacillus caldus' as a bacterial model. Production of MVs in 'F. caldus' occurred in both planktonic cultures and biofilms formed on sulfur surfaces, where MVs appeared individually or in chains resembling tube-shaped membranous structures (TSMSs) important for microbial communication. Liquid chromatography-mass spectrometry data and bioinformatic analysis of the MV-associated proteome revealed that 'F. caldus' MVs were enriched in proteins involved in cell-cell and cell-surface processes and largely typified the MVs as outer MVs (OMVs). Finally, microbiological assays showed that amendment of 'F. caldus' MVs to cells and/or biofilms affects collective colonizing behaviors relevant to the ecophysiology and applications of these acidophiles, providing grounds for their exploitation in biomining.

Estructura y tipología familiar en pacientes con dependencia o abuso de sustancias psicoactivas en un centro de rehabilitación de adicciones en el Municipio de Chía, Cundinamarca / Structure and Family Type in Patients With Substance Abuse or Dependence Psychoactive Rehabilitation Center of Addiction in the Municipality of Chia Cundinamarca

Objetivo: Determinar la estructura y la tipología familiar de un grupo de pacientes con dependencia o abuso de sustancias que se encontraban en un centro de rehabilitación de adicciones durante el periodo comprendido entre agosto y octubre de 2009. Métodos: A través de una metodología descriptiva cualitativa-interpretativa, se estudió a 10 pacientes y sus familias que cumplían los criterios de inclusión por dependencia o abuso de sustancias; el trabajo de campo y las transcripciones se realizaron durante 3 meses mediante observación no participante, entrevista no estructurada y revisión de la historia clínica del paciente. Resultados: De las familias entrevistadas, siete eran monoparentales, con una organización no convencional respecto a «roles de género¼. La familia monoparental favorece la soledad, la dificultad para poner reglas, la desidealización del lugar del padre en la estructura familiar y la búsqueda de una complicidad constante. En el análisis por categorías, se concluyó que en las 10 familias del estudio de personas con adicciones son frecuentes características de la estructura familiar como la comunicación inadecuada, la ausencia de autoridad, reglas y límites, la presencia de triangulaciones, la falta de cohesión dada por la existencia de un patrón de relación desligado y el cambio de roles convencionales con respecto a género. La búsqueda del afecto de la madre ante su ausencia emocional por la sobrecarga en los roles y la falta del padre, suscitada por la separación de la pareja, se encontró como un aspecto esencial subyacente al comportamiento adictivo. Se configura un patrón de abandono parental. Conclusiones: Se confirma lo mencionado por diversos autores acerca de las características de la tipología y la estructura familiar encontradas en pacientes con adicciones, además de su necesidad de afecto junto con la premura por una figura maternal. La tipología familiar no determina por sí misma el abuso de sustancias psicoactivas, sino la influencia de otros factores como la estructura familiar, especialmente las interacciones afectivas deficientes, lo cual debe considerarse en el desarrollo de las estrategias terapéuticas.

Objective: To determine the family type, family structure in a group of patients with a diagnosis of substance abuse or dependence who were at a rehabilitation center for addiction during the period between August and October 2009. Methods: Through a descriptive qualitative-interpretative methodology 10 patients who met inclusion criteria for substance dependence or abuse were studied. The fieldwork and transcripts were made for three months by non-participant observation, non-structured interviews and examination of patients' clinical history. Results: Seven of the families interviewed were single-parent families with an unconventional organization on "gender roles". Single-parent families favored loneliness, difficulty in rule-setting, de-idealization of the place of the father in the family structure and a constant search for complicity. In the analysis by categories, we found that in 10 families in the study of individuals with addictions it is common to find family structure characteristics such as inadequate communication, lack of authority rules and limits, presence of triangulations, the lack of cohesion due to the existence of a disconnected relationship pattern and changed roles compared to conventional gender. The search for the affection of the mother at her emotional overload absence of roles and lack of father, raised by the separation of the couple, was found as an essential aspect underlying the addictive behavior. A pattern of parental abandonment is configured. Conclusion: The findings confirmed what has been mentioned by various authors regarding the characteristics of the family typology structure and personal factors in patients with addictions, in addition to their need for affection combined with the desire for the mother's presence. The family typology does not determine for itself the abuse of psychoactive substances, but the influence of other factors such as family structure, especially deficient affective interactions, which should be considered in the development of therapeutic strategies.

Chlamydia pneumoniae en pacientes con neumonías adquiridas en la comunidad en Santiago de Chile / Incidence of community acquired pneumonia caused by chlamydia pneumoniae in Chilean subjects

Background: The prevalence of Chlamydia pneumoniae infection varies according to the population and geografic area studied. Aim: To evaluate the incidence of Chlamydia pneumoniae infection in Chilean subjects with community acquired pneumonia. Patients and methods: Between 1995 and 1997, patients with community acquired pneumonia attending two emergency rooms in Santiago, were studied. The diagnosis of Chlamydia pneumoniae infection was based on the detection of Chlamydia pneumoniae specific IgG antibody in samples from both the acute and convalescent phase, using an indirect microimmunofluorescent technique. Evidence of present infection was defined as seroconversion, a significant increase in the titer of the second sample and an initial titer equal or greater than 1/512. Results: During the study period, 160 patients consulted and seven (six male), aged 54ñ27 years old, complied with the diagnostic criteria of present Chlamydia pneumoniae infection. These patients had no special clinical or radiological features. Five of seven patients improved without any specific treatment. Conclusions: Eight percent of this sample of patients with community acquired pneumonia had Chlamydia pneumoniae infection. This agent should be included in the design of empiric treatment schemes, although our results cast doubt on the pathogenic role of Chlamydia pneumoniae in pneumonia

Elementos prefabricados en la construccion de edificaciones

El objetivo del presente proyecto de grado fue el demostrar que los elementos prefabricados son otra alternativa factible, actual y futura en la construcción de edificaciones en nuestro medio.Esto se consiguió eligiendo los métodos más adaptables a nuestro medio, aplicándolos luego a una estructura para después compararla a la construida por los métodos tradicionales.Debemos aclarar que las condiciones de estabilidad para ambos diseños fueron las mismas.

Manual de normas de atención médica en el servicio de gineco-obstetricia / sss

El hospital "Daniel Bracamonte" en el afán de contribuir a ésta tarea de disminuir la mortalidad materna ha elaborado el presente manual de normas de atención medica en la maternidad, producto del trabajo de los médicos Gineco-Obstetras de la maternidad seguros de permitir referir, tratar y solucionar las complicaciones del embarazo, en el Hospital, en los servicios de salud de áreas y distritos de la Secretaría Regional de Salud Potosí

Como transferir el poder de las ONGs a la comunidad para superar la mentalidad de la pobreza / Such as transferring the power of the NGOs to the community in order to surpass the mentality of the poverty

La preocupación actual sobre el incremento de la pobreza ha derivado en el uso de nuevos terminos que van desde el desarrollo economico con equidad, exclusivo, social, enfoque de genero, neoliberalismo, globalización, hasta desarrollo humano, mientras los pilares del esenario que la sostienen y perpetuan la pobreza permanecen incolumnes e incomprendidos...