‑userout option
The userout option specifies a tabbed text
output file with field names specified by the ‑userfields option. For example, the
following will give the same output as ‑blast6out hits.m8:
usearch -ublast reads.fastq -db proteins.fa -evalue
0.01 -userout hits.m8
-userfields
query+target+id+alnlen+mism+opens+qlo+qhi+tlo+thi+evalue+bits