First molecular detection and characterization of Marek's disease virus in red-crowned cranes (Grus japonensis): a case report
文献类型： 外文期刊
第一作者： Lian, Xue
作者： Lian, Xue;Ming, Xin;Xu, Jiarong;Jung, Yong-Sam;Qian, Yingjuan;Cheng, Wangkun;Zhang, Xunhai;Chen, Hongjun;Ding, Chan
作者机构：
关键词： Marek's disease virus; Red-crowned crane; Clinical necropsy; PCR; Homology
期刊名称：BMC VETERINARY RESEARCH （ 影响因子：2.741； 五年影响因子：2.955 ）
ISSN： 1746-6148
年卷期： 2018 年 14 卷
页码：
收录情况： SCI
摘要： Background: Marek's disease virus (MDV) resides in the genus Mardivirus in the family Herpesviridae. MDV is a highly contagious virus that can cause neurological lesions, lymphocytic proliferation, immune suppression, and death in avian species, including Galliformes (chickens, quails, partridges, and pheasants), Strigiformes (owls), Anseriformes (ducks, geese, and swans), and Falconiformes (kestrels). Case presentation: In 2015, two red-crowned cranes died in Nanjing (Jiangsu, China). It was determined that the birds were infected with Marek's disease virus by histopathological examination, polymerase chain reaction (PCR), gene sequencing and sequence analysis of tissue samples from two cranes. Gross lesions included diffuse nodules in the skin, muscle, liver, spleen, kidney, gizzard and heart, along with liver enlargement and gizzard mucosa hemorrhage. Histopathological assay showed that infiltrative lymphocytes and mitotic figures existed in liver and heart. The presence of MDV was confirmed by PCR. The sequence analysis of the Meq gene showed 100% identity with Md5, while the VP22 gene showed the highest homology with CVI988. Furthermore, the phylogenetic analysis of the VP22 and Meq genes suggested that the MDV (from cranes) belongs to MDV serotype 1. Conclusion: We describe the first molecular detection of Marek's disease in red-crowned cranes based on the findings previously described. To our knowledge, this is also the first molecular identification of Marek's disease virus in the order Gruiformes and represents detection of a novel MDV strain.
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