ʻO ka maʻi bacteria nā mea ola hoʻokahi-cell i ola no nā piliona makahiki. ʻO ia kekahi o nā ʻano ola maʻalahi loa ma ka honua a hiki ke loaʻa ma kahi kokoke i nā wahi āpau, mai ka ea āu e hanu ai a i ka meaʻai āu e ʻai ai a i loko o ka loko (ka wai āu e ʻau ai).
