الفهرس 
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Abstract
Pigeon Paramyxovirus 1 (PPMV-1) is a viral infection that is present worldwide causing high pigeon morbidity and mortality rates. PPMV-1 is enzootic and caused several outbreaks in domestic and wild pigeons in Egypt with substantial economic losses. It is important to investigate and assesment the pathogenicity and pathogenesis of field isolates of PPMV-1, in addition to the efficacy of available commercial vaccines.