The present disclosure provides vaccine compositions for use against enterotoxigenic Escherichia coli (ETEC) comprising EtpA and EatA. EtpA and EatA are prevalent amount diverse ETEC isolates and display significant sequence conservation. In an aspect, the disclosure encompasses a vaccine composition comprising EtpA and EatA. In another aspect, the disclosure encompasses a method of protecting against intestinal colonization of enterotoxigenic Escherichia coli (ETEC) in a subject. The method comprises administering to the subject an effective amount of a vaccine composition comprising EatA and EtpA.
