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Isolation, Identification, and Molecular Characterization of Newcastle Disease Virus from Field Outbreaks in Chickens in Afghanistan

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SUMMARY. Newcastle disease viruses (NDVs) in Afghanistan were isolated from three chicken farms and identified using a hemagglutination test and reverse transcription-polymerase chain reaction assay. Three isolates from each farm… Click to show full abstract

SUMMARY. Newcastle disease viruses (NDVs) in Afghanistan were isolated from three chicken farms and identified using a hemagglutination test and reverse transcription-polymerase chain reaction assay. Three isolates from each farm were sequenced to characterize the part of their fusion protein gene around the cleavage site. The characteristics of the fusion protein genes of the three isolates shown by phylogenic analysis indicated that the isolates were velogenic, belonged to the class II subgenotype VII 1.1, and were closely related to an identified Chinese NDV isolate. To our knowledge, this is the first time that NDV isolates from Afghanistan have been partially sequenced. RESUMEN. Aislamiento, identificación y caracterización molecular del virus de la enfermedad de Newcastle de brotes de campo en pollos en Afganistán Se aislaron virus de la enfermedad de Newcastle (NDV) en Afganistán de tres granjas de pollos y se identificaron mediante una prueba de hemaglutinación y un ensayo de transcripción reversa y reacción en cadena de la polimerasa. Se secuenciaron tres aislados de cada granja para caracterizar la parte correspondiente al gene de la proteína de fusión alrededor del sitio de disociación. Las características de los genes de la proteína de fusión de los tres aislamientos mostrados por el análisis filogenético indicaron que los aislamientos eran velogénicos, pertenecían a la clase II subgenotipo VII 1.1 y estaban estrechamente relacionados con un aislado del virus de Newcastle identificado en China. Hasta donde se sabe, esta es la primera vez que los aislamientos del virus de Newcastle de Afganistán se han secuenciado parcialmente.

Keywords: newcastle disease; virus; los; del virus

Journal Title: Avian Diseases
Year Published: 2022

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