61 research outputs found

    An approximation to the prediction of the summery emergence of "Ochlerotatus caspius" (Diptera: Culicidae) based on the relationship between degree-days accumulations and adult captures

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    Ochlerotatus caspius (Pallas) (Diptera, Culicidae) es el culícido más abundante durante el verano en las marismas de Huelva. Este estudio demuestra que la relación entre capturas de adultos, convertidas en probit, y la acumulación de temperatura o número de días-grado, convenientemente adaptada mediante a una transformación logarítmica, muestra ser signifi cativamente lineal para cada generación de este mosquito a lo largo de cada verano. Además, si se procesan todos los datos disponibles de todos los años considerados en el estudio se obtiene una alta correlación lineal y, en consecuencia, las ecuaciones resultantes poseen valor predictivo. Los resultados de la validación de los pronósticos que se extraen de las rectas de regresión log-probit, permiten que se puedan considerar estas rectas como una herramienta más de cara a aumentar la efi cacia de los programas de control integrado que se llevan a cabo en esta zona.Predicción de la emergencia estival de Ochlerotatus caspius (Diptera: Culicidae) basada en la relación entre la acumulación de días-grado y la captura de adultos. Ochlerotatus caspius (Pallas) (Diptera, Culicidae) es el culícido más abundante durante el verano en las marismas de Huelva. Este estudio demuestra que la relación entre capturas de adultos, convertidas en probit, y la acumulación de temperatura o número de días-grado, convenientemente adaptada mediante a una transformación logarítmica, muestra ser signifi cativamente lineal para cada generación de este mosquito a lo largo de cada verano. Además, si se procesan todos los datos disponibles de todos los años considerados en el estudio se obtiene una alta correlación lineal y, en consecuencia, las ecuaciones resultantes poseen valor predictivo. Los resultados de la validación de los pronósticos que se extraen de las rectas de regresión log-probit, permiten que se puedan considerar estas rectas como una herramienta más de cara a aumentar la efi cacia de los programas de control integrado que se llevan a cabo en esta zona

    Cirugía radioguiada en pacientes con recidiba locorregional de cáncer diferenciado de tiroides

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    Los tumores diferenciados de tiroides con frecuencia recidivan, afectando al 5-25% de todos los pacientes con CDT. Un 75% de ellas son recidivas ganglionares, en lecho tiroideo un 25% y un 5% en otras localizaciones. De las recidivas ganglionares del carcinoma papilar de tiroides, el 53% afecta a cadenas ganglionares laterocervicales y el 28% a estructuras ganglionares del compartimento central. Una disección orientada en compartimentos laterales y central mejoraría significativamente la recidiva y la supervivencia en los pacientes con tumores T1-T3. Uno de los principales problemas de la cirugía de rescate es que se suele realizar “a ciegas”. La cirugía de rescate oncológico “radioguiada” persigue mejorar esta situación, con ella se pretende establecer un puente entre las técnicas de diagnóstico por imagen y la cirugía intervencionista, intentando identificar preoperatoriamente pequeños focos neoplásicos y así facilitar la labor del cirujano. La cirugía radioguiada ROLL (Radioguieded Occult Lesion Localisation) se utiliza de forma preoperatoria para la localización de lesiones ocultas en mama, diagnosticadas previamente mediante mamografía o ecografía. Desde el punto de vista técnico, consiste en la inoculación intra o perilesional de un radiofármaco, Macroagregados de Albúmina marcados con 99mTC (MAA-99mTc) guiada con ecografía o mamografía. Se trata de un radiofármaco con nula o escasa difusión desde la zona de inyección, debido al tamaño de sus partículas (MMA), el 95% de las partículas presentan un tamaño, dimensión máxima, entre 10 y 150 µm. Es el ideal para este procedimiento ya que asegura mínima migración desde el lugar de inyección, con exéresis más rápida y segura de la lesión no palpable, reduciendo la cantidad de tejido sano resecado respecto a los métodos convencionales. Nosotros apicamos esta técnica a la recidiva del cáncer diferenciado de tiroides.La cirugía radioguiada permitió la resección del 100% de las lesiones, El resultado histopatológico no fue compatible con afectación ganglionar metastásica o recidiva local en el 27,2% de los casos (6 pacientes) y fue patológico, compatible con recidiva locorregional en el 72,7% de los casos (16 pacientes).Con estos resultados concluimos que es una técnica sencilla, segura, bien tolerada por el paciente, reproducible, con baja tasa de exposición a radiaciones. Permite realizar incisiones quirúrgicas de menor tamaño, comparada con la cirugía convencional de la recidiva, reduciendo notablemente el tiempo quirúrgico. Todo ello conlleva una reducción de la estancia media hospitalaria, pudiendo ser subsidiaria de cirugía mayor ambulatoria. Aunque la seguridad de la técnica y la ausencia de morbilidad hacen asumibles los casos negativos, todos los pacientes candidatos a la técnica ROLL deberían tener estudios prequirúrgicos positivos mediante ecografía, PET, Tg en suero y valor de Tg en el aspirado de la aguja de punción, con la finalidad de no dejar pasar una auténtica recidiva locorregional de cáncer diferenciado de tiroides

    Plants with chorological interest in the southern part of Extremadura region (Spain)

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    Se citan siete táxones encontrados en la mitad sur de Extremadura de interés corológico para la mitad sur de la Península Ibérica

    Plasma ACE2 species are differentially altered in COVID-19 patients

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    Studies are needed to identify useful biomarkers to assess the severity and prognosis of COVID-19 disease, caused by severe acute respiratory syndrome coronavirus (SARS-CoV-2) virus. Here, we examine the levels of various plasma species of the SARS-CoV-2 host receptor, the angiotensin-converting enzyme 2 (ACE2), in patients at different phases of the infection. Human plasma ACE2 species were characterized by immunoprecipitation and western blotting employing antibodies against the ectodomain and the C-terminal domain, using a recombinant human ACE2 protein as control. In addition, changes in the cleaved and full-length ACE2 species were also examined in serum samples derived from humanized K18-hACE2 mice challenged with a lethal dose of SARS-CoV-2. ACE2 immunoreactivity was present in human plasma as several molecular mass species that probably comprise truncated (70 and 75 kDa) and full-length forms (95, 100, 130, and 170 kDa). COVID-19 patients in the acute phase of infection (n = 46) had significantly decreased levels of ACE2 full-length species, while a truncated 70-kDa form was marginally higher compared with non-disease controls (n = 26). Levels of ACE2 full-length species were in the normal range in patients after a recovery period with an interval of 58-70 days (n = 29), while the 70-kDa species decreased. Levels of the truncated ACE2 species served to discriminate between individuals infected by SARS-CoV-2 and those infected with influenza A virus (n = 17). In conclusion, specific plasma ACE2 species are altered in patients with COVID-19 and these changes normalize during the recovery phase. Alterations in ACE2 species following SARS-CoV-2 infection warrant further investigation regarding their potential usefulness as biomarkers for the disease process and to asses efficacy during vaccination

    Post-acute COVID-19 syndrome. Incidence and risk factors: A Mediterranean cohort study

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    Objectives: This study aims to analyze the incidence of Post-acute COVID-19 syndrome (PCS) and its components, and to evaluate the acute infection phase associated risk factors.Methods: A prospective cohort study of adult patients who had recovered from COVID-19 (27th February to 29th April 2020) confirmed by PCR or subsequent seroconversion, with a systematic assessment 10-14 weeks after disease onset. PCS was defined as the persistence of at least one clinically relevant symptom, or abnormalities in spirometry or chest radiology. Outcome predictors were analyzed by multiple logistic regression (OR; 95%CI).Results: Two hundred seventy seven patients recovered from mild (34.3%) or severe (65.7%) forms of SARS-CoV-2 infection were evaluated 77 days (IQR 72-85) after disease onset. PCS was detected in 141 patients (50.9%; 95%CI 45.0-56.7%). Symptoms were mostly mild. Alterations in spirometry were noted in 25/269 (9.3%), while in radiographs in 51/277 (18.9%). No baseline clinical features behaved as independent predictors of PCS development.Conclusions: A Post-acute COVID-19 syndrome was detected in a half of COVID19 survivors. Radiological and spirometric changes were mild and observed in less than 25% of patients. No baseline clinical features behaved as independent predictors of Post-acute COVID-19 syndrome development

    Transient changes in the plasma of astrocytic and neuronal injury biomarkers in COVID-19 patients without neurological syndromes

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    This article belongs to the Special Issue Latest Advances in Neuroscience.The levels of several glial and neuronal plasma biomarkers have been found to increase during the acute phase in COVID-19 patients with neurological symptoms. However, replications in patients with minor or non-neurological symptoms are needed to understand their potential as indicators of CNS injury or vulnerability. Plasma levels of glial fibrillary acidic protein (GFAP), neurofilament light chain protein (NfL), and total Tau (T-tau) were determined by Single molecule array (Simoa) immunoassays in 45 samples from COVID-19 patients in the acute phase of infection [moderate (n = 35), or severe (n = 10)] with minor or non-neurological symptoms; in 26 samples from fully recovered patients after ~2 months of clinical follow-up [moderate (n = 23), or severe (n = 3)]; and in 14 non-infected controls. Plasma levels of the SARS-CoV-2 receptor, angiotensin-converting enzyme 2 (ACE2), were also determined by Western blot. Patients with COVID-19 without substantial neurological symptoms had significantly higher plasma concentrations of GFAP, a marker of astrocytic activation/injury, and of NfL and T-tau, markers of axonal damage and neuronal degeneration, compared with controls. All these biomarkers were correlated in COVID-19 patients at the acute phase. Plasma GFAP, NfL and T-tau levels were all normalized after recovery. Recovery was also observed in the return to normal values of the quotient between the ACE2 fragment and circulating full-length species, following the change noticed in the acute phase of infection. None of these biomarkers displayed differences in plasma samples at the acute phase or recovery when the COVID-19 subjects were sub-grouped according to occurrence of minor symptoms at re-evaluation 3 months after the acute episode (so called post-COVID or “long COVID”), such as asthenia, myalgia/arthralgia, anosmia/ageusia, vision impairment, headache or memory loss. Our study demonstrated altered plasma GFAP, NfL and T-tau levels in COVID-19 patients without substantial neurological manifestation at the acute phase of the disease, providing a suitable indication of CNS vulnerability; but these biomarkers fail to predict the occurrence of delayed minor neurological symptoms.This work was supported by grants from the Fondo de Investigaciones Sanitarias (PI19-01359, co-funded by the Fondo Europeo de Desarrollo Regional, FEDER “Investing in your future”), CIBERNED (Instituto de Salud Carlos III, Spain), by the Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL; grant 2020-0308) and from the Direcció General de Ciència I Investigació, Generalitat Valenciana (AICO/2021/308). MPL is supported by a BEFPI fellowship from the Generalitat Valenciana. HZ is a Wallenberg Scholar supported by grants from the Swedish Research Council (#2018-02532), the European Union’s Horizon Europe research and innovation programme under grant agreement No 101053962, Swedish State Support for Clinical Research (#ALFGBG-71320), the Alzheimer Drug Discovery Foundation (ADDF), USA (#201809-2016862), the AD Strategic Fund and the Alzheimer’s Association (#ADSF-21-831376-C, #ADSF-21-831381-C, and #ADSF-21-831377-C), the Bluefield Project, the Olav Thon Foundation, the Erling-Persson Family Foundation, Stiftelsen för Gamla Tjänarinnor, Hjärnfonden, Sweden (#FO2022-0270), the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 860197 (MIRIADE), the European Union Joint Programme–Neurodegenerative Disease Research (JPND2021-00694), and the UK Dementia Research Institute at UCL (UKDRI-1003).Peer reviewe

    Evaluación curricular: análisis y perspectivas desde la media.

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    Este libro, como resultado del marco del Convenio de Asociación entre la Secretaría de Educación del Distrito y la Corporación Universitaria Minuto de Dios No. 481978 de 2018 presenta la realidad de la escuela distrital, una institución que está en el centro administrativo del país, con presupuestos del Distrito Capital y orientada en procesos de lineamiento que incluso abren brechas con respecto al modelo nacional, como ocurrió con la educación por ciclos entre otras experimentaciones que se han desarrollado en términos de la regulación local. Esta serie de distanciamientos de lo nacional y la pervivencia de prácticas escolares paralelas a las intenciones sectoriales de desarrollo hace necesaria la evaluación de los procesos curriculares

    Evaluación curricular: análisis y perspectivas desde la media.

    Get PDF
    Este libro, como resultado del marco del Convenio de Asociación entre la Secretaría de Educación del Distrito y la Corporación Universitaria Minuto de Dios No. 481978 de 2018 presenta la realidad de la escuela distrital, una institución que está en el centro administrativo del país, con presupuestos del Distrito Capital y orientada en procesos de lineamiento que incluso abren brechas con respecto al modelo nacional, como ocurrió con la educación por ciclos entre otras experimentaciones que se han desarrollado en términos de la regulación local. Esta serie de distanciamientos de lo nacional y la pervivencia de prácticas escolares paralelas a las intenciones sectoriales de desarrollo hace necesaria la evaluación de los procesos curriculares

    Plasma ACE2 species are differentially altered in COVID-19 patients

    Get PDF
    Studies are needed to identify useful biomarkers to assess the severity and prognosis of COVID-19 disease, caused by severe acute respiratory syndrome coronavirus (SARS-CoV-2) virus. Here, we examine the levels of various plasma species of the SARS-CoV-2 host receptor, the angiotensin-converting enzyme 2 (ACE2), in patients at different phases of the infection. Human plasma ACE2 species were characterized by immunoprecipitation and western blotting employing antibodies against the ectodomain and the C-terminal domain, using a recombinant human ACE2 protein as control. In addition, changes in the cleaved and full-length ACE2 species were also examined in serum samples derived from humanized K18-hACE2 mice challenged with a lethal dose of SARS-CoV-2. ACE2 immunoreactivity was present in human plasma as several molecular mass species that probably comprise truncated (70 and 75 kDa) and full-length forms (95, 100, 130, and 170 kDa). COVID-19 patients in the acute phase of infection (n = 46) had significantly decreased levels of ACE2 full-length species, while a truncated 70-kDa form was marginally higher compared with non-disease controls (n = 26). Levels of ACE2 full-length species were in the normal range in patients after a recovery period with an interval of 58-70 days (n = 29), while the 70-kDa species decreased. Levels of the truncated ACE2 species served to discriminate between individuals infected by SARS-CoV-2 and those infected with influenza A virus (n = 17). In conclusion, specific plasma ACE2 species are altered in patients with COVID-19 and these changes normalize during the recovery phase. Alterations in ACE2 species following SARS-CoV-2 infection warrant further investigation regarding their potential usefulness as biomarkers for the disease process and to asses efficacy during vaccination.This study was funded in part by the Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL; grants 190258 and 2020-0308) and by the Instituto de Salud Carlos III (ISCIII, grants PI19-01359), co-financed by the Fondo Europeo de Desarrollo Regional (FEDER, “Investing in your future”) and through CIBERNED, ISCIII. We also acknowledge financial support from the Spanish Ministerio de Economía y Competitividad, through the “Severo Ochoa” Programme for Centres of Excellence in R&D (SEV-2017-0723). Work at CNB and CISA is funded by the Spanish Health Ministry, ISCIII, Fondo COVID-19 grant COV20/00151, and Fondo Supera COVID-19 (Crue Universidades-Banco Santander) (to JGA). MACG is supported by BEFPI fellowship from the Generalitat Valenciana. HZ is a Wallenberg Scholar supported by grants from the Swedish Research Council (#2018-02532), the European Research Council (#681712), and Swedish State Support for Clinical Research (#ALFGBG-720931).Peer reviewe
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