Az átoltható vírusos mirigyesgyomor-gyulladás (transmissible viral proventriculitis, TVP) első hazai megállapítása fácánban (Phasianus colchicus, Linnaeus, 1758)

Abstract

Background: The maldigestion syndrome and runting-stunting condition in broiler chickens are well known and widely described in Hungarian and international publications. One of the causes leading to this disease is proventricular necrosis with subacute lympho-histiocytic infiltration. Several authors identified the Chicken Proventricular Necrosis Virus (CPNV) as the pathogen of the disease, which belongs to the Birnaviridae family. In the literature available till now this virus was never described before in pheasants (Phasianus colchicus) as the cause ative agent of the disease and lesions. Objectives: As researching the causes of heterogenous growth and proventriculitis in Hungarian pheasant colonies we examined the Chicken Proventricular Necrosis Virus (CPNV) infection besides the presence of other possible viruses. Materials and Methods: During the diagnostic investigation we performed dissection, histopathology, and molecular examination on 25-day-old pheasant chicks from a colony which were kept according to the technological standards. Results and Discussion: In the examined pheasants we identified subacute proventriculitis as the cause of heterogenous growth and abnormal development. The histopathological examinations revealed solitary and multiple focal degeneration and necrosis of the glandular epithelial cells with lympho-histiocytic inflammation in the interglandular area. The samples taken from the affected proventricular wall were positive for Chicken Proventricular Necrosis Virus (CPNV) with the PCR examination and later sequencing.