Laboratory personnel were masked to the identity of the samples. Samples were prepared for metagenomic deep sequencing, as previously described.13 (link) Briefly, total RNA was extracted from 100 µL aqueous fluid samples using the Zymo quick-RNA microprep kit (Zymo Research, Irvine, CA) per the manufacturer's instructions. Sequencing libraries were prepared using the NEBNext RNA Ultra II kit (New England Biolabs, Ipswich, MA) and then amplified with 21 cycles. Libraries were sequenced on the NovaSeq 6000 using two technical replicates.