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1.
Langenbecks Arch Surg ; 409(1): 131, 2024 Apr 18.
Artículo en Inglés | MEDLINE | ID: mdl-38634929

RESUMEN

PURPOSE: To analyze if, after implementation of an evidence-based local multidisciplinary protocol for acute cholecystitis (AC), an intermediate surgical audit could improve early cholecystectomy (EC) rate and other therapeutic indicators. METHODS: Longitudinal cohort study at a tertiary center. The local protocol, promoted, created, and periodically revised by the Acute Care Surgery Unit (ACSu) was updated and approved on March 2019. A specific registry was prospectively fulfilled with demographics, comorbidity, type of presentation, diagnostic items, therapeutic decision, and clinical course, considering both non-operative management (NOM) or cholecystectomy, early and delayed (EC and DC). Phase 1: April 2019-April 2021. A critical analysis and a surgical audit with the participation of all the involved Departments were then performed, especially focusing on improving global EC rate, considered primary outcome. Phase 2: May 2021-May 2023. Software SPSS 23.0 was used to compare data between phases. RESULTS: Initial EC rate was significantly higher on Phase 2 (39.3%vs52.5%, p < 0.004), as a significantly inferior rate of patients were initially bailed out from EC to NOM because of comorbidity (14.4%vs8%, p < 0.02) and grade II with severe inflammatory signs (7%vs3%, p < 0.04). A higher percentage of patients was recovered for EC after an initial decision of NOM on Phase 2, but without reaching statistical significance (21.8%vs29.2%, n.s.). Global EC rate significantly increased between phases (52.5%vs66.3%, p < 0.002) without increasing morbidity and mortality. A significant minor percentage of elective cholecystectomies after AC episodes had to be performed on Phase 2 (14%vs6.7%, p < 0.009). Complex EC and those indicated after readmission or NOM failure were usually performed by the ACSu staff. CONCLUSION: To adequately follow up the implementation of a local protocol for AC healthcare, registering and periodically analyzing data allow to perform intermediate surgical audits, useful to improve therapeutic indicators, especially EC rate. AC constitutes an ideal model to work with an ACSu.


Asunto(s)
60510 , Colecistitis Aguda , Humanos , Estudios Longitudinales , Colecistectomía , Sistema de Registros
2.
Cir. mayor ambul ; 29(1): 2-14, Ene-Mar, 2024. tab, graf
Artículo en Español | IBECS | ID: ibc-231072

RESUMEN

Introducción: La colecistectomía laparoscópica ambulatoria (CLA) se considera en la actualidad un trazador representativo de la calidad de un servicio de cirugía general. La gran diversidad de unidades de cirugía ambulatoria dificulta la comparativa de los diferentes indicadores de calidad. Objetivo: Conocer los resultados del manejo de la CLA en un centro integrado y como afecta a sus indicadores de calidad. Pacientes y método: Estudio observacional prospectivo entre 2015 y 2021 de las colecistectomías programadas en unidad integrada. Resultados: Se intervinieron 887 pacientes, el 76,5 % (n = 679) programados en régimen ambulatorio. La pernocta no planificada (PNP) media fue del 25,2 % (n = 171), siendo el índice de sustitución del 57,8 %. Las principales causas de PNP fueron: intolerancia digestiva (48,5 %), cirugía compleja (29,2 %) y el dolor (12,8 %). Los tiempos quirúrgicos fueron superiores en los pacientes en régimen de ingreso (p < 0,001) y en aquellos que causaron PNP (p < 0,001). Un tiempo quirúrgico superior a los 45 minutos fue causa de PNP de forma significativa (p = 0,007). La tasa global de infección de sitio quirúrgico fue del 3,1 %,siendo la infección profunda del 0,59 %. Ningún paciente reingresó en las primeras 24 horas, siendo la asistencia a urgencias a 30 días del 8,2 % (n = 73),reingresando el 1,91 % (n = 17) de los pacientes, con una tasa de reintervención del 0,35 % (n = 3). La tasa de fístula biliar fue del 0,67 %. Conclusión: La CLA es una técnica segura y expansiva, aunque la obtención de parámetros de calidad estandarizados es complejo por la diversidad de unidades.(AU)


Introduction: Ambulatory laparoscopic cholecystectomy (ALC) is currently considered a representative tracer of the quality of a general surgery service. The great diversity of day surgery units makes it difficult to compare the different quality index. Objective: To know the results of the management of the CLA in an integrated center and how it affects its quality index. Patients and method: Prospective observational study between 2015 and 2021 of scheduled cholecystectomies in an integrated unit. Results: 887 patients were operated on, 76.5 % (n = 679) programmed on an outpatient basis. The average unplanned overnight stay (PNP) was 25.2 % (n = 171), with the replacement rate being 57.8 %. The main causes of PNP were: digestive intolerance (48.5 %), complex surgery (29.2 %) and pain (12.8 %). Surgical times were higher in patients on admission (p < 0.001) and in those who caused PNP (p < 0.001). Surgical time greater than 45 minutes was a significant cause of PNP (p = 0.007). The overall rate of surgical site infection was 3.1 %, with deep infection being 0.59 %. No patient was readmitted in the first 24 hours, with 30-day emergency care being 8.2 % (n = 73), readmission rate of 1.91 % (n = 17), with a reoperation rate of 0.35 % (n = 3). The biliary fistula rate was 0.67 %. Conclusion: CLA is a safe and expansive technique, although obtaining quality standard parameters is complex due to the diversity of units.(AU)


Asunto(s)
Humanos , Masculino , Femenino , Procedimientos Quirúrgicos Ambulatorios , Colecistectomía Laparoscópica , Fístula Biliar , Indicadores de Calidad de la Atención de Salud , Cirugía General , Estudios Prospectivos
3.
Actas dermo-sifiliogr. (Ed. impr.) ; 115(1): 76-79, jan. 2024. graf
Artículo en Español | IBECS | ID: ibc-229344

RESUMEN

La escabiosis es una dermatosis ectoparasitaria causada por Sarcoptes scabiei var. hominis y cuyo reservorio son los humanos. En los últimos años se ha visto un incremento de los casos de escabiosis en nuestro país. El objetivo de este trabajo es complementar la evidencia existente sobre el aumento de la escabiosis en España mediante el estudio de la evolución del consumo de medicamentos ectoparasiticidas y el análisis temporal en Google Trends de las búsquedas en internet relacionadas con la infestación, así como explorar la relación entre ambos fenómenos. Nuestro estudio demuestra un incremento del interés público en la escabiosis y del consumo de ectoparasiticidas en los últimos años en España, existiendo una correlación positiva y significativa entre ambos fenómenos. Proponemos Google Trends como una herramienta complementaria a tener en cuenta a la hora de monitorizar en tiempo real el comportamiento de esta infestación en nuestro país (AU)


Scabies is an ectoparasitic dermatosis caused by the Sarcoptes scabiei var. hominis mite, which lives and reproduces in humans. Its incidence in Spain has increased in recent years. The aim of this study was to complement existing evidence on the increasing number of scabies cases in our country by analyzing changes in ectoparasiticide prescriptions and Internet searches for scabies infestations measured by Google Trends. We also examined correlations between these two variables. Our results show that public interest in scabies has increased in recent years and is positively and significantly correlated with an increasing use of ectoparasiticides. We believe that Google Trends should be considered as a complementary tool for monitoring real-time trends in scabies infestations in Spain (AU)


Asunto(s)
Humanos , Escabiosis/epidemiología , Escabiosis/tratamiento farmacológico , España/epidemiología , Incidencia
4.
Actas dermo-sifiliogr. (Ed. impr.) ; 115(1): t76-t79, jan. 2024. ilus
Artículo en Inglés | IBECS | ID: ibc-229345

RESUMEN

Scabies is an ectoparasitic dermatosis caused by the Sarcoptes scabiei var. hominis mite, which lives and reproduces in humans. Its incidence in Spain has increased in recent years. The aim of this study was to complement existing evidence on the increasing number of scabies cases in our country by analyzing changes in ectoparasiticide prescriptions and Internet searches for scabies infestations measured by Google Trends. We also examined correlations between these two variables. Our results show that public interest in scabies has increased in recent years and is positively and significantly correlated with an increasing use of ectoparasiticides. We believe that Google Trends should be considered as a complementary tool for monitoring real-time trends in scabies infestations in Spain (AU)


La escabiosis es una dermatosis ectoparasitaria causada por Sarcoptes scabiei var. hominis y cuyo reservorio son los humanos. En los últimos años se ha visto un incremento de los casos de escabiosis en nuestro país. El objetivo de este trabajo es complementar la evidencia existente sobre el aumento de la escabiosis en España mediante el estudio de la evolución del consumo de medicamentos ectoparasiticidas y el análisis temporal en Google Trends de las búsquedas en internet relacionadas con la infestación, así como explorar la relación entre ambos fenómenos. Nuestro estudio demuestra un incremento del interés público en la escabiosis y del consumo de ectoparasiticidas en los últimos años en España, existiendo una correlación positiva y significativa entre ambos fenómenos. Proponemos Google Trends como una herramienta complementaria a tener en cuenta a la hora de monitorizar en tiempo real el comportamiento de esta infestación en nuestro país (AU)


Asunto(s)
Humanos , Escabiosis/epidemiología , Escabiosis/tratamiento farmacológico , España/epidemiología , Incidencia
7.
Food Waterborne Parasitol ; 34: e00214, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38188968

RESUMEN

Cryptosporidium parvum and Blastocystis hominis are foodborne parasites known for causing diarrhea. They accumulate in mussels grown on contaminated water bodies, due to the discharge of treated sewage from sewage treatment plants (STP). Despite this, some countries like Chile do not include these parasites in the control or monitoring of sewage water. The objective of this research was to evaluate the contamination of C. parvum. and B. hominis from treated sewage (disinfected by chlorination) and Cholga mussels in a touristic rural cove from the bay of Concepción. Cholga mussels from commercial stores and a treated sewage sample were analyzed. Cryptosporidium spp. was identified by Ziehl-Neelsen-Staining (ZNS) and C. parvum by direct-immunofluorescence assay (IFA) from ZNS-positive samples. Blastocystis hominis was identified by PCR using locus SSU rDNA. C. parvum and B. hominis subtype ST3 were found in 40% and 45% of Cholga mussel samples, respectively, and both parasites were identified in the treated sewage. Blastocystis hominis SSU rDNA gene alignment from Cholga mussels and treated sewage showed 89% of similarity, indicating that could be the same parasite in both samples. We describe the first evidence of possible contamination with these parasites from treated sewage to Cholga mussel suggesting an environmental contamination with high human risk. Based on these results, further studies will consider all the rural coves and STP from the bay to prevent possible contamination of these parasites.

9.
Med Oral Patol Oral Cir Bucal ; 29(1): e36-e43, 2024 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-37330964

RESUMEN

BACKGROUND: Oral cancer is a common neoplasm worldwide, mostly corresponding to squamous cell carcinoma (OSCC). Unfortunately, its overall prognosis remains poor, with no improvement in recent decades. In this study, we have analysed the epidemiological, clinical, and prognostic characteristics of OSCC on patients of a specific Spanish region (Galicia), in order to improve its prognosis and apply effective preventive and early diagnosis measures. MATERIAL AND METHODS: We retrospectively analysed 243 cases of OSCC, diagnosed and treated in a single hospital centre in Galicia between 2010 and 2015 (minimum of 5 years of evolution). Overall and specific survival were calculated (Kaplan-Meier) and associated variables were identified (log rank test and Cox regression). RESULTS: The mean age of the patients was 67 years, with the majority being male (69.5%), smokers (45.9%) and alcohol consumers (58.6%), who lived in non-urban areas (79.4%). Cases diagnosed at advanced stages entailed the 48.1% of the sample, and 38.7% of cases relapsed. The 5-year overall and disease-specific survival rates were 39.9% and 46.1%, respectively. Patients who consumed tobacco and alcohol had a worse prognosis. OSCC cases referred to hospital by specialist dentists had a better prognosis, as those who were previously diagnosed with an oral potentially malignant oral disorder (OPMD) or received dental care during OSCC treatment. CONCLUSIONS: In view of these findings, we conclude that OSCC in Galicia (Spain) still has a very poor overall prognosis, which is mainly related to the advanced age of the patients and the late diagnosis. Our study highlights the better survival of OSCC in relation to the referring health professional, the presence of a previous OPMD and the dental care after diagnosis. This demonstrates the importance of dentistry as a health profession involved in the early diagnosis and multidisciplinary management of this malignant neoplasm.


Asunto(s)
Carcinoma de Células Escamosas , Neoplasias de Cabeza y Cuello , Neoplasias de la Boca , Humanos , Masculino , Anciano , Femenino , Pronóstico , Carcinoma de Células Escamosas de Cabeza y Cuello , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/epidemiología , Carcinoma de Células Escamosas/terapia , Estudios Retrospectivos , Neoplasias de la Boca/diagnóstico , Neoplasias de la Boca/epidemiología , Neoplasias de la Boca/terapia , Estudios de Seguimiento , España/epidemiología
10.
Actas Dermosifiliogr ; 115(1): T76-T79, 2024 Jan.
Artículo en Inglés, Español | MEDLINE | ID: mdl-37923075

RESUMEN

Scabies is an ectoparasitic dermatosis caused by the Sarcoptes scabiei var. hominis mite, which lives and reproduces in humans. Its incidence in Spain has increased in recent years. The aim of this study was to complement existing evidence on the increasing number of scabies cases in our country by analyzing changes in ectoparasiticide prescriptions and Internet searches for scabies infestations measured by Google Trends. We also examined correlations between these two variables. Our results show that public interest in scabies has increased in recent years and is positively and significantly correlated with an increasing use of ectoparasiticides. We believe that Google Trends should be considered as a complementary tool for monitoring real-time trends in scabies infestations in Spain.


Asunto(s)
Escabiosis , Animales , Humanos , Escabiosis/tratamiento farmacológico , Escabiosis/epidemiología , España/epidemiología , Sarcoptes scabiei
12.
Actas Dermosifiliogr ; 115(1): 76-79, 2024 Jan.
Artículo en Inglés, Español | MEDLINE | ID: mdl-37356548

RESUMEN

Scabies is an ectoparasitic dermatosis caused by the Sarcoptes scabiei var. hominis mite, which lives and reproduces in humans. Its incidence in Spain has increased in recent years. The aim of this study was to complement existing evidence on the increasing number of scabies cases in our country by analyzing changes in ectoparasiticide prescriptions and Internet searches for scabies infestations measured by Google Trends. We also examined correlations between these two variables. Our results show that public interest in scabies has increased in recent years and is positively and significantly correlated with an increasing use of ectoparasiticides. We believe that Google Trends should be considered as a complementary tool for monitoring real-time trends in scabies infestations in Spain.


Asunto(s)
Escabiosis , Animales , Humanos , Escabiosis/tratamiento farmacológico , Escabiosis/epidemiología , España/epidemiología , Sarcoptes scabiei
15.
Artículo en Inglés | MEDLINE | ID: mdl-38083190

RESUMEN

Patients that have suffered a myocardial infarction are at high risk of developing ventricular tachycardia. Patient stratification is often determined by characterization of the underlying myocardial substrate by cardiac imaging methods. In this study, we show that computer modeling of cardiac electrophysiology based on personalized fast 3D simulations can help to assess patient risk to arrhythmia. We perform a large simulation study on 21 patient digital twins and reproduce successfully the clinical outcomes. In addition, we provide the sites which are prone to sustain ventricular tachycardias, i.e, onset sites around the scar region, and validate if they colocalize with exit sites from slow conduction channels.Clinical relevance- Fast electrophysiological simulations can provide advanced patient stratification indices and predict arrhythmic susceptibility to suffer from ventricular tachycardia in patients that have suffered a myocardial infarction.


Asunto(s)
Infarto del Miocardio , Taquicardia Ventricular , Humanos , Taquicardia Ventricular/diagnóstico , Arritmias Cardíacas , Miocardio , Infarto del Miocardio/complicaciones , Infarto del Miocardio/diagnóstico , Electrofisiología Cardíaca
16.
Rev. esp. anestesiol. reanim ; 70(10): 561-568, Dic. 2023. ilus, tab
Artículo en Español | IBECS | ID: ibc-228132

RESUMEN

Antecedentes y objetivo: Los pacientes con infección por SARS-CoV-2 pueden presentar afectación cardiovascular, incluyendo miocarditis, arritmias y prolongación del intervalo QT. Nuestro objetivo fue evaluar el impacto de la COVID-19 y su tratamiento en la repolarización ventricular y el desarrollo de arritmias en pacientes críticos. Material y métodos: Estudio de cohortes retrospectivo de pacientes críticos con infección confirmada por SARS-CoV-2 durante un periodo de 3meses. Se registraron los datos clínicos relevantes y el tratamiento específico administrado para la COVID-19. Se consideró QTc prolongado cuando medía ≥460ms en mujeres y ≥450ms en hombres. Se registró la incidencia y el tipo de arritmias durante el mismo periodo. Resultados: Se evaluaron 77 pacientes con una edad media de 62±13años: 20 mujeres y 57 hombres. El 60% de los pacientes eran hipertensos, el 52% presentaban un IMC>30 y el 70% desarrollaron fracaso renal agudo durante el ingreso. El 56% de los pacientes presentaron prolongación del QTc. El 44% presentaron algún tipo de arritmia durante su estancia en la UCI, siendo en el 21% arritmias auriculares. La mortalidad global fue del 53%, sin diferencias entre los pacientes con o sin QTc prolongado. Conclusiones: En nuestra serie, una elevada proporción de pacientes críticos con COVID-19 han presentado QTc prolongado y arritmias. Los factores implicados se han relacionado con la elevación de biomarcadores cardiacos, la propia afectación miocárdica del virus y la medicación concomitante recibida en la UCI.(AU)


Introduction and objective: Patients with SARS-CoV-2 infection may present cardiovascular involvement including myocarditis, arrhythmias and QT interval prolongation. Our objective was to evaluate the impact of COVID-19 and its treatment on ventricular repolarization and development of arrhythmias in critically ill patients. Material and methods: Retrospective cohort study of critically ill COVID-19 patients during a 3-month period in whom at least one ECG was available. Relevant clinical data and specific treatment administered for COVID-19 were recorded. Prolonged QTc was considered prolonged when it measured ≥460ms in women and ≥450ms in men. The incidence and type of arrhythmias during the same period were recorded. Results: A total of 77 patients with a mean age of 62±13years, 20 women and 57 men, were evaluated. Sixty percent of the patients were hypertensive, 52% had a BMI>30, and 70% developed acute renal failure during admission. Some 56% of the patients presented QTc prolongation. Forty-four percent presented some type of arrhythmia during their stay in the ICU, 21% of which were atrial arrhythmias. Overall mortality was 53%, with no differences between patients with or without prolonged QTc. Conclusions: In our series, a high proportion of critical patients with COVID-19 presented prolonged QTc and arrhythmias. The factors involved have been related to the elevation of cardiac biomarkers, the myocardial involvement of the virus and concomitant medication received in the ICU.(AU)


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Anciano , Síndrome de QT Prolongado , /tratamiento farmacológico , Arritmias Cardíacas/tratamiento farmacológico , Estudios de Cohortes , Síndrome de QT Prolongado/epidemiología , Estudios Retrospectivos , /complicaciones
17.
Arch. Soc. Esp. Oftalmol ; 98(11): 656-659, nov. 2023. ilus
Artículo en Español | IBECS | ID: ibc-227205

RESUMEN

La nocardiosis sistémica es una enfermedad poco frecuente. Su diseminación por vía hematógena al globo ocular lo es aún todavía más, con muy pocos casos documentados, por lo que su sospecha como posible diagnóstico en caso de absceso subretiniano no es la norma. Sin embargo, con unos antecedentes de inmunodepresión y enfermedad pulmonar, la imagen de fondo de ojo es enormemente indicativa. Presentamos el caso de un varón de 45 años inmunosuprimido, sin clínica pulmonar, que inició con una masa subretiniana que por su evolución es compatible con un absceso, diagnosticado etiológicamente en última instancia mediante vitrectomía como infección por Nocardia cyriacigeorgica, un patógeno emergente. Sumamos así nuestro caso, con sus peculiaridades, a otros para documentar una enfermedad que por su infrecuencia puede ser tardíamente diagnosticada (AU)


Systemic nocardiosis is a rarely occurring pathology, but its hematogenous spread across the eye is even less likely to occur, with only a few recorded cases. Therefore, it is not usually taken into account when a subretinal abscess is being considered for a diagnosis. However, when confronting a case with a history of immunosuppression and pulmonary disease, the examination of the ocular fondo may be a very successful approach. With such aim we introduce the case of a 45-year-old immunosuppressed male, without a history of pulmonary disease, whose subretinal mass evolution is accordant with an abscess. In the end, being etiologically diagnosed by means of a vitrectomy, it was concluded that the abscess was due to an infection of Nocardia cyriacigeorgica, an emergent pathogen. Thus the aforementioned case is to be considered in the present study, along others, in order to shed more light on a disease which may not be readily diagnosed on account of its infrequency (AU)


Asunto(s)
Humanos , Masculino , Persona de Mediana Edad , Enfermedades de la Retina/microbiología , Huésped Inmunocomprometido , Absceso/microbiología , Nocardiosis/diagnóstico
18.
Rev Esp Anestesiol Reanim (Engl Ed) ; 70(10): 561-568, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37717632

RESUMEN

INTRODUCTION: Patients with SARS-CoV-2 infection may present cardiovascular involvement including myocarditis, arrhythmias and QT interval prolongation. Our objective was to evaluate the impact of COVID-19 and its treatment on ventricular repolarization and development of arrhythmias in critically ill patients. METHODS: Retrospective cohort study of critically ill COVID-19 patients during a 3-month period in whom at least one ECG was available. Relevant clinical data and specific treatment administered for COVID-19 were recorded. Prolonged QTc was considered prolonged when it measured ≥ 460 ms in women and ≥450 ms in men. The incidence and type of arrhythmias during the same period were recorded. RESULTS: A total of 77 patients with a mean age of 62 ±â€¯13 years, 20 women and 57 men, were evaluated. Sixty percent of the patients were hypertensive, 52% had a BMI > 30, and 70% developed acute renal failure during admission. Some 56% of the patients presented QTc prolongation. Forty-four percent presented some type of arrhythmia during their stay in the ICU, 21% of which were atrial arrhythmias. Overall mortality was 53%, with no differences between patients with or without prolonged QTc. CONCLUSIONS: In our series, a high proportion of critical patients with COVID-19 presented prolonged QTc and arrhythmias. The factors involved have been related to the elevation of cardiac biomarkers, the myocardial involvement of the virus and concomitant medication received in the ICU.


Asunto(s)
COVID-19 , Síndrome de QT Prolongado , Masculino , Humanos , Femenino , Persona de Mediana Edad , Anciano , COVID-19/complicaciones , COVID-19/epidemiología , Estudios de Cohortes , Estudios Retrospectivos , Enfermedad Crítica , Pandemias , Prevalencia , SARS-CoV-2 , Síndrome de QT Prolongado/epidemiología , Síndrome de QT Prolongado/complicaciones , Arritmias Cardíacas/epidemiología , Arritmias Cardíacas/etiología
19.
Arch Soc Esp Oftalmol (Engl Ed) ; 98(11): 656-659, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37595793

RESUMEN

Systemic nocardiosis is a rarely occurring pathology, but its hematogenous spread across the eye is even less likely to occur, with only a few recorded cases. Therefore, it is not usually taken into account when a subretinal abscess is being considered for a diagnosis. However, when confronting a case with a history of immunosupression and pulmonary disease, the examination of the ocular fundus may be a very successful approach. With such aim we introduce the case of a 45-year-old immunosupressed male, without a history of pulmonary disease, whose subretinal mass evolution is accordant with an abscess. In the end, being etiologically diagnosed by means of a vitrectomy, it was concluded that the abscess was due to an infection of nocardia cyriacigeorgica, an emergent pathogen. Thus the aforementioned case is to be considered in the present study, along others, in order to shed more light on a disease which may not be readily diagnosed on account of its infrequency.


Asunto(s)
Enfermedades Pulmonares , Nocardiosis , Nocardia , Masculino , Humanos , Persona de Mediana Edad , Absceso/etiología , Antibacterianos/uso terapéutico , Nocardiosis/diagnóstico , Nocardiosis/tratamiento farmacológico , Nocardiosis/etiología , Enfermedades Pulmonares/complicaciones , Enfermedades Pulmonares/tratamiento farmacológico
20.
Bioresour Technol ; 387: 129643, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37562492

RESUMEN

This study addresses the problem of replacing nitrate and ammonium with urea as a greener nitrogen source in the mass cultivation of the microalga Amphidinium carterae for the development of amphidinol-based phytosanitary products. To solve this problem, a nuclear magnetic resonance assisted investigation evaluated the effect of nitrogen sources on growth and metabolic profiles in photobioreactors. Urea-fed cultures exhibited growth kinetics comparable to nitrate-fed cultures (µmax = 0.30 day-1, Pbmax = 43 mgL-1day-1). Urea-fed cultures had protein, lipid, and carbohydrate contents of 39.5%, 14.5%, and 42.4%, respectively, while nitrate-fed cultures had 27.9 %, 17.5% and 48.1%, respectively. Metabolomics revealed nitrogen source-dependent metabotypes and a correlation between amphidinols and polyunsaturated fatty acids. The amphidinol-to-nitrogen yield coefficient in urea-fed cultures (135 mg/g) was approximately 2.5 times higher than in nitrate-fed cultures. The potent antiphytopathogenic activity exhibited by extracts from urea-fed cultures underscores the potential of urea as a sustainable nitrogen source in microalgae-based biorefineries.


Asunto(s)
Dinoflagelados , Microalgas , Plaguicidas , Urea , Plaguicidas/metabolismo , Biomasa , Fotobiorreactores , Nitrógeno/metabolismo , Nitratos/metabolismo , Dinoflagelados/metabolismo , Microalgas/metabolismo
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