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Emerging diseases are acknowledged as a growing threat to wildlife, with the continued identification of pathogenic and potentially pathogenic viruses in avian species resulting from ongoing advances in molecular diagnostic techniques. Parvoviruses under the genus Chaphamaparvovirus (subfamily Hamaparvovirinae) are highly divergent. The detection and characterisation of parvoviruses in psittacine birds is limited. This study reports a novel parvovirus, tentatively named psittaciform chaphamaparvovirus 3 (PsChV-3) under the genus Chaphamaparvovirus, identified in an Australian free-ranging little corella (Cacatua sanguinea). The PsChV-3 genome is 4277 bp in length and encompasses four predicted open-reading frames, including two major genes, a nonstructural replicase gene (NS1), and a structural capsid gene (VP1). The NS1 and VP1 genes showed the closest amino acid identities of 78.8% and 69.7%, respectively, with a recently sequenced psittaciform chaphamaparvovirus 2 from Australian Neophema species grass parrots. In addition, the presence of two complete novel beak and feather disease (BFDV) genomes, 1993 and 1868 nt in length, respectively, were detected from the same bird. Both these BFDV genomes contained two bidirectional ORFs encoding the putative Rep and Cap proteins. Phylogenetic analysis showed that the sequenced novel BFDV genomes clustered in a distinct subclade with other BFDVs isolated from Australian cockatoos. This study contributes to the characterisation chaphamaparvoviruses and BFDV in Australian parrots and supports the need for ongoing monitoring and molecular studies into the avian virome in native Australian psittacine bird species. 相似文献
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2008年7月末,我国青岛即墨地区患病的虎皮鹦鹉幼雏出现体重下降、脱羽和羽毛变形萎缩、鸟喙变形及胸腺结构变异等症状,怀疑为鹦鹉喙羽病(PBFD)。利用PCR对濒死鹦鹉进行鹦鹉喙羽病病毒(PBFDV)的检测,并对扩增的C1基因进行了测序与分析。结果表明,有两只检测为PBFDV阳性,B last分析发现,QD-CN08株与GenBank中已发表的PBFDV分离株C1基因同源性为82%~93%,进化树分析表明与日本的毒株有比较近的亲缘关系。结合临床症状、流行病学特征和实验室诊断,确诊为鹦鹉喙羽病,此病为中国大陆首次报道。 相似文献