Rotavirus A Associated with Clinical Disease and Hepatic Necrosis in California Pigeons (Columba livia domestica)

被引:11
|
作者
Blakey, Julia [1 ]
Crossley, Beate [2 ]
Rosenberger, John K. [3 ]
Rejmanek, Daniel [2 ]
Markis, Milos [3 ]
Bickford, Arthur [1 ]
Bland, Mark [4 ]
Woods, Leslie [2 ]
Shivaprasad, H. L. [5 ]
Goldsmith, Dayna [5 ]
Stoute, Simone [1 ]
机构
[1] Univ Calif Davis, Turlock Branch, Calif Anim Hlth & Food Safety Lab Syst, 1550 N Soderquist Rd, Turlock, CA 95380 USA
[2] Univ Calif Davis, Davis Branch, Calif Anim Hlth & Food Safety Lab Syst, 620 W Hlth Sci Dr, Davis, CA 95616 USA
[3] AviServe LLC, 1 Innovat Way,Suite 100, Newark, DE 19711 USA
[4] Cutler Vet Associates Int, 3562 Jomar Dr, Napa, CA 94558 USA
[5] Univ Calif Davis, Tulare Branch, Calif Anim Hlth & Food Safety Lab Syst, 18760 Rd 112, Tulare, CA 93274 USA
关键词
rotavirus A; pigeon; hepatic necrosis; California; reovirus; AVIAN ROTAVIRUS; IDENTIFICATION; INFECTIONS; CHICKENS; PHEASANT; TURKEYS; VIRUS; PCR;
D O I
10.1637/aviandiseases-D-19-00114
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Retrospective analysis of pigeon necropsy submissions to the California Animal Health and Food Safety Laboratory System from 2000 to 2018 revealed 14 submissions diagnosed with rotavirus A hepatic necrosis or "reoviruslike" viral hepatitis. Nine of the 14 submissions (64%) occurred in 2018. Submissions were racing pigeons and squab breeders from flocks with increased mortality. Juvenile and adult pigeons were submitted with a history of depression, diarrhea, regurgitation, labored breathing, and weakness. Flock morbidity peaked at 80% and mortality at 28%. The most consistent findings on postmortem examination were variably congested, mottled, and enlarged livers and spleens. Microscopically, mild to severe hepatic necrosis was observed with variable bile duct hyperplasia, sinusoidal congestion, hemosiderosis, and portal lymphoplasmacytic inflammation. Rotavirus A was detected in hepatocytes and inflammatory cells by immunohistochemistry. Negative-stain electron microscopy identified viral particles consistent with a member of Reoviridae in all negatively stained liver homogenates. Eleven cases were analyzed by reverse transcriptase-PCR targeting rotavirus A viral protein (VP) 6 and VP7 genes. Subsequent phylogenetic analysis of the VP6 and VP7 sequences compared to published Chinese, Nigerian, and German rotavirus A VP6 and VP7 sequences demonstrated the formation of two and three distinct clades, respectively. To the authors' knowledge, rotavirus A hepatic necrosis in pigeons has not been previously reported in the United States and represents a significant emerging disease for the pigeon industry due to the potential for high flock mortality and lost production.
引用
收藏
页码:651 / 658
页数:8
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