| 释义 |
metacercaria, n. Zool.|ˌmɛtəsɜːˈkɛərɪə|
Pl. -iae.
[f. meta- 4 + Cercaria n.]
The (usu. encysted) final larval form of a trematode into which a cercaria develops prior to assuming the adult form in the definitive host.
1927Jrnl. R. Microsc. Soc. XLVII. 169 Metacercariæ of Strigeidæ have been found parasitic in the eyes of a large number of fish such as the sturgeon. 1930E. C. Faust Human Helminthol. ii. 32 After the cercaria emerges from the mollusc and discards its tail it is spoken of as the metacercaria or adolescaria. 1978Nature 21 Sept. 216/1 Resistance..operates against intraperitoneally implanted metacercariae, juvenile or adult flukes as well as against orally administered metacercariae. 1988J. C. Bell et al. Zoonoses 148 Cercariae develop into metacercariae, which migrate into the bile ducts of definitive hosts after they eat the fish. |