Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla A cikin tsarin kwakwalwa na vertebrate, ƙananan ƙwayoyin ƙwayoyin cuta suna'' gano'a cikin wannan ma'anar.
Tabbas, mafi rikitarwa na jumla shine "A cikin tsarin jijiyoyin vertebrate ƙananan ƙwayoyin cuta ne 'an gano' 'a wannan ma'anar - a cikin mutane, ana tsammanin babu wani - amma a cikin tsarin jijiyoyi mafi sauki, wasu ko duk ƙwayoyin cuta na iya zama na musamman. "