埃可病毒（ECHO virus），正式名称肠性细胞致病性人类孤独型病毒（Enteric Cytopathic Human Orphan virus），是一种肠病毒，可引发手足口病，甚至脑膜炎和脑炎等并发症，惟较罕见。

An ECHO (Enteric Cytopathic Human Orphan) virus, is a type of RNA virus that belongs to the species Enterovirus B, genus Enterovirus of the Picornaviridae family. Echoviruses are found in the gastrointestinal tract (hence it being part of the enterovirus genus) and exposure to the virus causes other opportunistic infections and diseases.