原生生物是一個國際論壇，報告在任何原生生物研究領域的重大和新的發現。接受稿件的標準是科學的卓越性、意義和廣大讀者的興趣。適合的學科領域包括:分子、細胞與發育生物學、生物化學、系統學與系統學、原生生物生態學。自養原生生物和異養原生生物以及寄生蟲都包括在內。該雜志出版原始論文，簡短的歷史觀點，并包括一個新聞和觀點部分。

Protist is the international forum for reporting substantial and novel findings in any area of research on protists. The criteria for acceptance of manuscripts are scientific excellence, significance, and interest for a broad readership. Suitable subject areas include: molecular, cell and developmental biology, biochemistry, systematics and phylogeny, and ecology of protists. Both autotrophic and heterotrophic protists as well as parasites are covered. The journal publishes original papers, short historical perspectives and includes a news and views section.