| Option |  | Description | 
| -uchimeout |  | Tabbed output file. The 
‑uchimeout5 option sets the uchimeout format to be
compatible with v5 and earlier versions of usearch. | 
| -uchimealns |  | Human-readable 3-way 
alignments of query to putative parents. | 
| -chimeras |  | FASTA file with 
sequences classified as chimeric. | 
| -nonchimeras |  | FASTA file with 
sequences classified as not chimeric. | 
| -chimerasq |  | FASTQ file with 
sequences classified as chimeric (v8.0.1616 or later). | 
| -nonchimerasq |  | FASTQ file with 
sequences classified as not chimeric (v8.0.1616 or later). |