Download sequences from NCBI and eDirect

[SeqTroubles]

Hi All,

I want to down load a batch of sequences from NCBI using eDirect.

I currently using the follow command which

esearch -db nuccore -query "escherichia coli" | efilter -source refseq -molecule rna | efetch -format fasta | xargs -n 1 sh -c 'efetch -db nuccore -id "$0" -format fasta > "$0".fna'

But this seem to spit out each individual line as a fasta.

How to I get the command to give me individual files for each strain.

Thanks