Beak and feather disease virus (BFDV) has been found in Oceania, Africa, Asia and Europe, but the virus has not yet been detected in India. Here we are reporting the detection of BFDV in exotic rainbow lorikeets (Trichoglossus haematodus) in India. In the phylogenetic analysis, India's witnessed BFDV complete genome, replication (Rep) and capsid (Cap) sequences were displayed close to previously reported T. haematodus infecting BFDV from Australia. Further, we observed that the Indian and exotic Psittaciformes except T. haematodus housed together with the BFDV infected rainbow lorikeets did not display clinical signs and were negative for 4-month genome detection. This observation raised the suspicion that BFDV could cause host-specific infections. In addition, our phylogenetic analysis using 361 BFDV complete genome sequences from various bird species revealed that they were mainly grouped according to the specific species. Likewise, similarity plot analysis shows that the BFDV complete genome sequences found in T. haematodus are significantly different in areas such as the origin of Rep, the intergenic region between the 3′ ends of the Rep and capsid (Cap) genes, and the Cap gene, compared to the BFDVs found in other birds. Furthermore, the BFDV-host coevolution analysis clarifies that the TimeTree of the evolution of various Psittaciformes bird species is the coevolution of the BFDV complete genome/Rep gene/Rep protein/Cap gene/Cap protein sequences found in the respective bird species. To our best knowledge, it is essential to note that no research has yet provided conclusive scientific evidence or experimental evidence that BFDVs detected from Trichoglossus sp. can infect other bird species. Therefore, it can be expected that the BFDVs found in the exotic bird in India will not infect Indian Psittaciformes. However, we hope that large-scale surveillance of BFDV in Indian birds will help determine the BFDV genome present in Indian birds and take further action.

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印度喙羽病病毒的检测及其意义

喙羽病病毒（BFDV）已在大洋洲、非洲、亚洲和欧洲发现，但尚未在印度检测到该病毒。在这里，我们报告了在印度异国情调的彩虹澳洲鹦鹉 ( Trichoglossus haematodus ) 中检测到 BFDV。在系统发育分析中，印度目击的 BFDV 完整基因组、复制 (Rep) 和衣壳 (Cap) 序列显示接近先前报道的感染澳大利亚 BFDV 的T. haematodus 。此外，我们观察到除了T. haematodus之外的印度和外来鹦鹉与 BFDV 感染的彩虹澳洲鹦鹉一起饲养，没有表现出临床症状，并且在 4 个月的基因组检测中呈阴性。这一观察结果引起了 BFDV 可能引起宿主特异性感染的怀疑。此外，我们使用来自不同鸟类的 361 个 BFDV 完整基因组序列的系统发育分析表明，它们主要根据特定物种进行分组。同样，相似性图分析表明，在T. haematodus中发现的 BFDV 全基因组序列在Rep 起源、Rep 和衣壳 (Cap) 基因 3' 端之间的基因间区域以及 Cap 等区域存在显着差异基因，与在其他鸟类中发现的 BFDV 相比。此外，BFDV-宿主协同进化分析阐明了各种病毒进化的时间树鹦形目鸟类物种是在各自鸟类物种中发现的 BFDV 完整基因组/Rep 基因/Rep 蛋白/Cap 基因/Cap 蛋白序列的共同进化。据我们所知，必须指出的是，目前还没有研究提供确凿的科学证据或实验证据表明 BFDVs 从Trichoglossus sp. 中检测到。可以感染其他鸟类。因此，可以预计，在印度的珍奇鸟类身上发现的BFDVs不会感染印度鹦鹉。然而，我们希望对印度鸟类中 BFDV 的大规模监测将有助于确定印度鸟类中存在的 BFDV 基因组并采取进一步行动。