7 research outputs found

    Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic

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    This study aimed to describe the change in surgical practice and the impact of SARS-CoV-2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS-CoV-2 pandemic

    El cultivo del paiche: biologĂ­a, procesos productivos, tecnologĂ­as y estadĂ­sticas

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    Mucho se ha escrito acerca del paiche o pirarucĂș (Arapaima gigas), existiendo un amplio consenso al considerarla como la especie que sustentarĂĄ el desarrollo de la acuicultura de exportaciĂłn en los prĂłximos años en la AmazonĂ­a peruana, debido a sus excelentes caracterĂ­sticas zootĂ©cnicas: (i) calidad y rendimiento de carne, (ii) rĂĄpido crecimiento que permite, con una fase de pre crĂ­a, conseguir ejemplares entre 8 a 12 kilos por año, (iii) rusticidad y adaptabilidad al manipuleo y a bajas concentraciones de oxĂ­geno disuelto en el agua, (iv) filete sin presencia de espinas, (v) piel y escamas que pueden ser utilizadas para la producciĂłn de cueros y artesanĂ­as, etc. Hoy se reportan valiosas experiencias que demuestran la viabilidad de la paichicultura, pues luego de un periodo de adaptaciĂłn se reproduce naturalmente en estanques de tierra y pueden ser alimentados con dietas balanceadas, peces frescos o forraje de fĂĄcil crianza, permitiendo al paichicultor producir carne y alevinos con facilidad. Sirva como ejemplo lo que estĂĄ ocurriendo en la carretera Iquitos-Nauta y Yurimaguas, en la regiĂłn Loreto, donde existen empresas que estĂĄn logrando producir entre 20 a 70 mil alevinos por año, lo que podrĂ­a dar soporte a un importante programa de desarrollo de la crianza de Arapaima en esta parte de la AmazonĂ­a peruana. No obstante, siguen existiendo cuellos de botella para desarrollar la paichicultura en Loreto: i) el alto precio del alimento balanceado ofertado bĂĄsicamente por empresas comercializadoras de Lima, ii) la falta de infraestructura y logĂ­stica para el procesamiento post-cosecha (cadena de frĂ­o), iii) la falta de conectividad terrestre de Iquitos con el resto del paĂ­s, iv) los costes de flete y, tal vez lo mĂĄs importante, v) el reducido tamaño del mercado nacional para los productos hidrobiolĂłgicos amazĂłnicos debido a la falta de difusiĂłn/promociĂłn del consumo de peces amazĂłnicos por parte del Estado. Este manual tiene el propĂłsito de compilar y actualizar la informaciĂłn existente sobre la reproducciĂłn y crianza de esta valiosa especie, presentando modelos exitosos desarrollados por empresarios y el propio IIAP, incrementando, de este modo, el grado de conocimiento para el manejo de las distintas etapas de producciĂłn de la paichicultura. El presente manual es una guĂ­a que proporciona informaciĂłn actualizada sobre variados aspectos del manejo del paiche en acuicultura. Estamos seguros que la aplicaciĂłn de los protocolos y tecnologĂ­as descritas en este documento constituyen herramientas importantes, que unidas a la experiencia del operador y a la asesorĂ­a de un profesional pesquero o acuĂ­cola, potenciarĂĄn el Ă©xito de la paichicultura

    Introduction or reintroduction? Last resorts for the latest bird to become extinct in Europe, the Andalusian hemipode Turnix sylvatica sylvatica

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    The Andalusian hemipode (Turnix sylvatica sylvatica) (Order: Turniciformes, Family: Turnicidae), formerly distributed in several Mediterranean countries, is a critically endangered bird, if not already extinct. Subspecies of the T. sylvatica complex, in turn composed by nine subspecies are widely distributed in Africa and southern Asia. The last free-ranging Andalusian hemipodes were shot by hunters near Donana National Park (Spain) in 1981. Therefore, this species could be the last bird species getting extinct in Iberia and Europe in the XXth century. This investigation deals with the phylogenetic relationships of the Andalusian hemipode with the sup- posedly congeneric T. varia, T. tanki, T. suscitator and T. pyrrhothorax, and with the supposedly conspeciïŹc T. sylvatica lepurana, which is the geographically nearest buttonquail population (occurring in central and southern Africa). A 606 bp long fragment of the cytochrome b gene (approx. 1140 bp) of the mitochondrial DNA was sequenced, using both museum skins (the only available source for T. s. sylvatica) or blood/tissue samples from contemporary individuals (remaining species and subspecies). Seven haplotypes were found: two each for T. varia and T. s. lepurana, and one each for T. tanki, T. suscitator, T. pyrrhothorax, and T. s. sylvatica. Sequence divergence values obtained from pairwise distances between the T. sylvatica group haplotypes and the other species, ranged from 19.4 to 25.9%. The low genetic divergence between T. s. sylvatica and T. s. lepurana (0.00–0.01%) conïŹrmed that the current classiïŹcation based on morphological characters is correct, and that these two taxa may should be considered as subspecies. This close relationship would permit an introduction T. sylvatica where the species was last seen in Spain (i.e., Donana National Park). This area is now strictly protected and human persecution is no longer a problem.Peer reviewe

    Delaying surgery for patients with a previous SARS-CoV-2 infection

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    Elective Cancer Surgery in COVID-19–Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study

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    The impact of surgical delay on resectability of colorectal cancer: An international prospective cohort study

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    AimThe SARS-CoV-2 pandemic has provided a unique opportunity to explore the impact of surgical delays on cancer resectability. This study aimed to compare resectability for colorectal cancer patients undergoing delayed versus non-delayed surgery.MethodsThis was an international prospective cohort study of consecutive colorectal cancer patients with a decision for curative surgery (January-April 2020). Surgical delay was defined as an operation taking place more than 4 weeks after treatment decision, in a patient who did not receive neoadjuvant therapy. A subgroup analysis explored the effects of delay in elective patients only. The impact of longer delays was explored in a sensitivity analysis. The primary outcome was complete resection, defined as curative resection with an R0 margin.ResultsOverall, 5453 patients from 304 hospitals in 47 countries were included, of whom 6.6% (358/5453) did not receive their planned operation. Of the 4304 operated patients without neoadjuvant therapy, 40.5% (1744/4304) were delayed beyond 4 weeks. Delayed patients were more likely to be older, men, more comorbid, have higher body mass index and have rectal cancer and early stage disease. Delayed patients had higher unadjusted rates of complete resection (93.7% vs. 91.9%, P = 0.032) and lower rates of emergency surgery (4.5% vs. 22.5%, P ConclusionOne in 15 colorectal cancer patients did not receive their planned operation during the first wave of COVID-19. Surgical delay did not appear to compromise resectability, raising the hypothesis that any reduction in long-term survival attributable to delays is likely to be due to micro-metastatic disease
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