Members of the family Circoviridae are known to infect several avian species, with the ability to cause severe disease outcomes in some species. Using a high-throughput sequencing-informed approach, we identified two novel lineages of circoviruses, referred to as wigfec circovirus 1 and 2, in faecal matter of American wigeons (Mareca americana) collected in Arizona, USA. Wigfec circovirus 1 was identified in eight samples and is most closely related to the other waterfowl circoviruses, sharing ~64% genome-wide sequence identity with duck circoviruses. On the other hand, wigfec circovirus 2 was identified in two samples and is most closely related to two circoviruses identified in bat samples, sharing ~71% genome-wide pairwise identity. Both novel circoviruses were recovered from samples collected at the same location two months apart. Furthermore, in one sample, both of these viruses were identified, indicating these viruses are likely common amongst these birds and/or their environment.

中文翻译：

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在野生美国 wigeon 样本中发现的属于圆环病毒科的新型病毒。

已知圆环病毒科的成员会感染几种鸟类，并能够在某些物种中引起严重的疾病后果。使用高通量测序知情方法，我们在美国亚利桑那州收集的美洲野鸽 (Mareca americana) 的粪便中鉴定了两个新的圆环病毒谱系，称为 wigfec 圆环病毒 1 和 2。在 8 个样本中鉴定出 Wigfec 圆环病毒 1，与其他水禽圆环病毒的关系最为密切，与鸭圆环病毒具有约 64% 的全基因组序列同一性。另一方面，在两个样本中发现了 wigfec 圆环病毒 2，并且与在蝙蝠样本中发现的两个圆环病毒关系最密切，具有约 71% 的全基因组成对同一性。这两种新型圆环病毒都是从相隔两个月在同一地点收集的样本中回收的。此外，