esearch

Perform a new Entrez search using terms in indexed fields. It is part of the edirect package. More information: https://www.ncbi.nlm.nih.gov/books/NBK179288/.

• Search the pubmed database for selective serotonin reuptake inhibitor:

esearch -db pubmed -query "selective serotonin reuptake inhibitor"

• Search the protein database using a query and regexp:

esearch -db protein -query 'Escherichia*'

• Search the nucleotide database for sequences whose metadata contain insulin and rodents:

esearch -db nuccore -query "insulin [PROT] AND rodents [ORGN]"

• Display help:

esearch -h