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Editor, Senior Moderator
J Vet Res. 2019 Dec 19;63(4):497-502. doi: 10.2478/jvetres-2019-0073. eCollection 2019 Dec. [h=1]Pathological Changes in Natural Infection of Pheasants with Highly Pathogenic Avian Influenza A (H5N8) in Bulgaria.[/h]
Stoimenov GM[SUP]1[/SUP], Goujgoulova GV[SUP]2[/SUP], Nikolov B[SUP]3[/SUP], Hristov K[SUP]4[/SUP], Teneva A[SUP]5[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] [h=4]Introduction:[/h] The study of histopathological changes caused by influenza A (H5N8) viral infection in bird species is essential for the understanding of their role in the spread of this highly infectious virus. However, there are few such studies under natural conditions in minor gallinaceous species. This article describes the pathomorphological findings in Colchis pheasants infected naturally with H5N8 during an epizootic outbreak in Bulgaria.
[h=4]Material and Methods:[/h] Samples of internal organs of 10 carcasses were collected for histopathological and immunohistochemical evaluation, virus isolation and identification, and nucleic acid detection.
[h=4]Results:[/h] Consistent macroscopic findings were lesions affecting the intestine, heart, lung, and pancreas. Congestion and mononuclear infiltrate were common findings in the small intestine, as were necrosis and lymphoid clusters in the lamina propria of the caeca. Congestion with small focal necrosis and gliosis with multifocal nonpurulent encephalitis were observed in the brain. Myocardial interstitial oedema and degenerative necrobiotic processes were also detected. Immunohistological analysis confirmed systemic infection and revealed influenza virus nucleoprotein in all analysed organs.
[h=4]Conclusion:[/h] Variable necrosis was observed in the brain, liver, trachea, heart, small intestine, and caeca. Viral antigen was commonly found in the brain, heart, lung and trachea. Contact with migrating waterfowls was suspected as a reason for the outbreak.
? 2019 G.M. Stoimenov et al. published by Sciendo.
[h=4]KEYWORDS:[/h] Bulgaria; avian influenza A virus; histopathology; immunohistochemistry; pheasants
PMID: 31934658 PMCID: PMC6950441 DOI: 10.2478/jvetres-2019-0073
Free PMC Article
Stoimenov GM[SUP]1[/SUP], Goujgoulova GV[SUP]2[/SUP], Nikolov B[SUP]3[/SUP], Hristov K[SUP]4[/SUP], Teneva A[SUP]5[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] [h=4]Introduction:[/h] The study of histopathological changes caused by influenza A (H5N8) viral infection in bird species is essential for the understanding of their role in the spread of this highly infectious virus. However, there are few such studies under natural conditions in minor gallinaceous species. This article describes the pathomorphological findings in Colchis pheasants infected naturally with H5N8 during an epizootic outbreak in Bulgaria.
[h=4]Material and Methods:[/h] Samples of internal organs of 10 carcasses were collected for histopathological and immunohistochemical evaluation, virus isolation and identification, and nucleic acid detection.
[h=4]Results:[/h] Consistent macroscopic findings were lesions affecting the intestine, heart, lung, and pancreas. Congestion and mononuclear infiltrate were common findings in the small intestine, as were necrosis and lymphoid clusters in the lamina propria of the caeca. Congestion with small focal necrosis and gliosis with multifocal nonpurulent encephalitis were observed in the brain. Myocardial interstitial oedema and degenerative necrobiotic processes were also detected. Immunohistological analysis confirmed systemic infection and revealed influenza virus nucleoprotein in all analysed organs.
[h=4]Conclusion:[/h] Variable necrosis was observed in the brain, liver, trachea, heart, small intestine, and caeca. Viral antigen was commonly found in the brain, heart, lung and trachea. Contact with migrating waterfowls was suspected as a reason for the outbreak.
? 2019 G.M. Stoimenov et al. published by Sciendo.
[h=4]KEYWORDS:[/h] Bulgaria; avian influenza A virus; histopathology; immunohistochemistry; pheasants
PMID: 31934658 PMCID: PMC6950441 DOI: 10.2478/jvetres-2019-0073
Free PMC Article