RESUMEN
Suboptimal egg incubation temperature is a risk factor for the development of skeletal deformities in teleosts. Triplicate diploid and triploid Atlantic salmon, Salmo salar L., egg batches were incubated at 6, 8 and 10 °C up until first feeding, whereupon fish were reared on a natural temperature before examination for externally visible skeletal deformities (jaw and spine) and radiographed for vertebral deformities and morphology at the parr stage. Increasing incubation temperatures and triploidy increased the number of fish showing one or more deformed vertebrae. Triploids had significantly higher mean vertebrae cranio-caudal length (L) and dorsal-ventral height (H) ratio at 6 and 10 °C than diploids, but triploidy had no effect on mean vertebrae centra area. Triploids demonstrated an increase in lower jaw deformities with increased incubation temperature, whereas jaw deformities were rare in diploids. Fish incubated at 10 °C had a significantly lower mean vertebral number than fish incubated at 6 °C, and triploids had lower mean vertebral numbers than diploids. Diploid fish with 58 vertebrae had a significantly higher mean vertebral centra area than fish with 59 vertebrae, but vertebral number did not affect the mean vertebral L/H ratio. The results are discussed with respect to the welfare and production of farmed salmonids.
Asunto(s)
Enfermedades de los Peces/etiología , Enfermedades de los Peces/genética , Calor , Enfermedades de la Columna Vertebral/veterinaria , Columna Vertebral/anomalías , Triploidía , Animales , Prevalencia , Salmo salar , Enfermedades de la Columna Vertebral/etiología , Enfermedades de la Columna Vertebral/genética , Cigoto/fisiologíaRESUMEN
Heart deformities are a concern in aquaculture and are linked to egg incubation temperature. Diploid and triploid Atlantic salmon, Salmo salar L., were incubated at 6, 8 and 10 °C and analysed for aplasia of the septum transversum (n = 150 ploidy⻹ incubation temperature⻹). Heart morphology (size and shape) was assessed in fish incubated at 6 °C and in fish with and without aplasia of the septum transversum (n = 9 group⻹) incubated at 10 °C. Egg mortality was significantly higher in triploids than in diploids at all incubation temperatures, and increased egg incubation temperatures increased mortality in both ploidy. Triploids grew quicker than diploids after egg incubation at 10 °C, but not at 6 °C. Aplasia of the septum transversum occurred only in triploid fish after incubation at 6 °C and 8 °C (0.7% and 3.3%, respectively) and was significantly greater (P ≤ 0.05) in triploids after incubation at 10 °C compared with diploids (30% and 18%, respectively). Aplasia of the septum transversum significantly increased heart mass and resulted in a long flat ventricle compared with fish displaying a septum transversum. The results suggest triploid salmon should be incubated below 8 °C.
Asunto(s)
Enfermedades de los Peces , Cardiopatías Congénitas/veterinaria , Temperatura , Animales , Acuicultura , Diploidia , Enfermedades de los Peces/epidemiología , Enfermedades de los Peces/genética , Enfermedades de los Peces/mortalidad , Cardiopatías Congénitas/epidemiología , Cardiopatías Congénitas/genética , Cardiopatías Congénitas/mortalidad , Óvulo/fisiología , Prevalencia , Reproducción , Salmo salar , TriploidíaRESUMEN
A case of spontaneous pneumocephalus with progression to tension pneumocephalus is presented. It is unique because it occurred spontaneously via a sellar defect 5 years after resection and irradiation of a pituitary adenoma, without tumor recurrence. Computed tomography clarified the extent of the pneumocephalus and its progression to tension pneumocephalus.
Asunto(s)
Adenoma/cirugía , Neoplasias Hipofisarias/cirugía , Neumocéfalo/diagnóstico por imagen , Adenoma/radioterapia , Anciano , Presión del Aire , Duramadre/diagnóstico por imagen , Humanos , Masculino , Meningismo/diagnóstico por imagen , Meningismo/etiología , Neoplasias Hipofisarias/radioterapia , Neumocéfalo/etiología , Factores de Tiempo , Tomografía Computarizada por Rayos XAsunto(s)
Arteriopatías Oclusivas/diagnóstico por imagen , Enfermedades de las Arterias Carótidas/diagnóstico por imagen , Displasia Fibromuscular/diagnóstico por imagen , Arteria Vertebral/diagnóstico por imagen , Anciano , Arterias Carótidas/diagnóstico por imagen , Enfermedades de las Arterias Carótidas/patología , Femenino , Displasia Fibromuscular/patología , Humanos , Radiografía , Arteria Vertebral/patologíaRESUMEN
A case of multiple saccular cerebral aneurysms in association with a left-sided inferior vena cava and hemiazygos continuation is presented. To our knowledge, this association has not previously been recorded in the literature.
Asunto(s)
Vena Ácigos/anomalías , Aneurisma Intracraneal/complicaciones , Vena Cava Inferior/anomalías , Vena Ácigos/diagnóstico por imagen , Humanos , Aneurisma Intracraneal/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Tomografía Computarizada por Rayos X , Vena Cava Inferior/diagnóstico por imagenRESUMEN
Computed tomography was performed in two cases of blood-brain barrier (BBB) disruption due to cerebral arteriography. The first case showed diffuse contrast enhancement in the right frontotemporal region in the distribution of the middle cerebral artery; in the second case patchy contrast enhancement in both gray and white matter of both hemispheres was demonstrated. The possible mechanism for BBB disruption in these patients is discussed.