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Astrovirus: A Cause of an Enteric Disease in Turkey Poults

Donald L. Reynolds and Y. M. Saif
Avian Diseases
Vol. 30, No. 4 (Oct. - Dec., 1986), pp. 728-735
DOI: 10.2307/1590577
Stable URL: http://www.jstor.org/stable/1590577
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Astrovirus: A Cause of an Enteric Disease in Turkey Poults
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Abstract

Virus particles of 30 nm diameter and star-shaped morphology were detected in intestinal contents of turkey poults and were identified as astroviruses. Seventy-six intestinal samples from 65 commercial turkey flocks between 6 and 35 days of age were evaluated for the presence of astroviruses by immune electron microscopy. Astroviruses were frequently detected in intestinal samples from poults that had enteritis and diarrhea of undetermined etiology. Astroviruses were geographically widespread and were present in poults from all six operations evaluated. Astroviruses were inoculated into specific-pathogen-free poults. Changes observed in the gastrointestinal tract were: dilatated ceca containing yellowish frothy contents, gaseous fluid in the intestinal tract, and loss of tone of the intestinal tract (gut thinness). Poults experimentally inoculated with astrovirus gained significantly less body weight and absorbed significantly less D-xylose than uninoculated controls. /// En el contenido intestinal de pavitos, se identificaron partículas virales semejantes a astrovirus. Estas partículas tenían un diámetro promedio de 30 nm con una morfología en forma de estrella similar a los astrovirus identificados en otras especies. Se obtuvieron 76 muestras de intestino procedentes de 65 parvadas de pavos que fluctuaban entre los 6 y los 35 días de edad. Estas muestras se estudiaron para observar la presencia de astrovirus por medio de la técnica de microscopía electrónica usando antisuero contra astrovirus. Los astrovirus fueron detectados frecuentemente en muestras de pavitos que padecían enteritis y diarrea de etiología desconocida. Los astrovirus estaban ampliamente diseminados geográficamente y estuvieron presentes en pavitos de todas las 6 empresas evaluadas. Los astrovirus fueron inoculados en pavitos libres de gérmenes patógenos. Los cambios observados en el tracto gastrointestinal fueron: dilatación del ciego con contenido espumoso, de color amarillo; presencia de líquido gaseoso en el tracto intestinal con pérdida del tono del mismo (pared intestinal delgada). Los pavitos infectados experimentalmente con astrovirus tuvieron una menor ganancia de peso y la absorción de D-xilosa fué menor que en los controles no inoculados.

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