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|-help]}}