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Germinal elements and their development in Echinostoma caproni and Echinostoma paraensei (Trematoda) miracidia.
J Parasitol. 2001 Oct; 87(5):1160-4.JP

Abstract

Among the large cells located in the posterior of Echinostoma caproni and E. paraensei miracidia are secretory cells, germinal cells (GC), and undifferentiated cells. Secretory cells do not give rise to progeny, whereas GC do. Undifferentiated cells develop into GC that can also divide to produce embryos. Cleavage of GC of E. caproni occurs only after the parasite has entered the snail host and develops into a sporocyst. With E. paraensei, GC are larger than noted for E. caproni, and in 3 of 23 miracidia examined, germinal cell cleavage had occurred in the miracidium such that an embryo containing 20-25 blastomeres was present. Observations on the germinal elements of miracidia help to explain previous results showing that (1) E. paraensei sporocysts release mother rediae a few days earlier than do sporocysts of E. caproni, and that (2) a single mother redia is produced ahead of all others by sporocysts of E. paraensei, but not by sporocysts of E. caproni. The present study adds support to the concept that E. caproni and E. paraensei are distinct species.

Authors+Show Affiliations

Department of Zoology, Russian State Pedagogical University, St Petersburg.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

11695384

Citation

Ataev, G L., et al. "Germinal Elements and Their Development in Echinostoma Caproni and Echinostoma Paraensei (Trematoda) Miracidia." The Journal of Parasitology, vol. 87, no. 5, 2001, pp. 1160-4.
Ataev GL, Dobrovolskij AA, Avanessian AV, et al. Germinal elements and their development in Echinostoma caproni and Echinostoma paraensei (Trematoda) miracidia. J Parasitol. 2001;87(5):1160-4.
Ataev, G. L., Dobrovolskij, A. A., Avanessian, A. V., & Loker, E. S. (2001). Germinal elements and their development in Echinostoma caproni and Echinostoma paraensei (Trematoda) miracidia. The Journal of Parasitology, 87(5), 1160-4.
Ataev GL, et al. Germinal Elements and Their Development in Echinostoma Caproni and Echinostoma Paraensei (Trematoda) Miracidia. J Parasitol. 2001;87(5):1160-4. PubMed PMID: 11695384.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Germinal elements and their development in Echinostoma caproni and Echinostoma paraensei (Trematoda) miracidia. AU - Ataev,G L, AU - Dobrovolskij,A A, AU - Avanessian,A V, AU - Loker,E S, PY - 2001/11/7/pubmed PY - 2002/1/5/medline PY - 2001/11/7/entrez SP - 1160 EP - 4 JF - The Journal of parasitology JO - J Parasitol VL - 87 IS - 5 N2 - Among the large cells located in the posterior of Echinostoma caproni and E. paraensei miracidia are secretory cells, germinal cells (GC), and undifferentiated cells. Secretory cells do not give rise to progeny, whereas GC do. Undifferentiated cells develop into GC that can also divide to produce embryos. Cleavage of GC of E. caproni occurs only after the parasite has entered the snail host and develops into a sporocyst. With E. paraensei, GC are larger than noted for E. caproni, and in 3 of 23 miracidia examined, germinal cell cleavage had occurred in the miracidium such that an embryo containing 20-25 blastomeres was present. Observations on the germinal elements of miracidia help to explain previous results showing that (1) E. paraensei sporocysts release mother rediae a few days earlier than do sporocysts of E. caproni, and that (2) a single mother redia is produced ahead of all others by sporocysts of E. paraensei, but not by sporocysts of E. caproni. The present study adds support to the concept that E. caproni and E. paraensei are distinct species. SN - 0022-3395 UR - https://www.unboundmedicine.com/medline/citation/11695384/Germinal_elements_and_their_development_in_Echinostoma_caproni_and_Echinostoma_paraensei__Trematoda__miracidia_ L2 - https://doi.org/10.1645/0022-3395(2001)087[1160:GEATDI]2.0.CO;2 DB - PRIME DP - Unbound Medicine ER -