Summary[edit] Description: English: Unstained Echinostoma egg from faeces preserved in formalin. Source: : This media comes from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #655. Note: Not all PHIL images are public domain; be sure to check copyright status and credit authors and content providers. العربية | Deutsch | English | македонски | slovenščina | +/−. Author: Centers for Disease Control and Prevention and Dr. Mae Melvin.