Nom du corpus

Corpus Systématique Animale

Titre du document

The life cycle of Brachycoelium mesorchium Byrd, 1937 (Trematoda: Digenea: Brachycoeliinae)

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mollusques_v2b_00526
Auteur(s)
  • Helen E. Jordan 1
  • Elon E. Byrd 2
Affiliation(s)
  • 1) Institute of Comparative Medicine and Department of Pathology and Parasitology School of Veterinary Medicine, University of Georgia, USA
  • 2) Zoology Department, University of Georgia, USA
Résumé

The terrestrial mollusks Triodopsis caroliniensis (LEA) and Mesodon inflectus (Say) served satisfactorily as the first intermediate hosts for Brachycoelium mesorchium Byrd, 1937. They, along with the other species exposed, served as second intermediate hosts. On losing its ciliated epidermal plates the miacidium became transformed into a syncytium having eight, large nuclei (the primary mass). The primary mass entered a blood vessel where all further development occurred. Within three weeks the mass developed into a multiloculated (compartmentalized) cyst-like organism, the compartments of which were incompletely surrounded by fibers and cells of the blood vessel's wall, strengthened by an accumulation of the host's connective tissue (reactive) cells. The “first generation” embryos developed (in situ) into elongated, sporocyst-like organisms enclosed in a supporting layer of host tissues. After six weeks the parasitic mass comprised many centers of growth, first generation organisms containing second generation embryos and a conglomerate of parasitic cells. By the ninth week the second generation embryos had developed (in situ) into thick-walled, tubular organisms possessing a prominent musculo-glandular, sucking apparatus and had a covering of fibers and cells derived from the host's tissues. As these redia-like forms aged they assumed many different shapes and sizes, although typically they were flask-shaped, with a tubular, neck-like part and a vesicular body: ultimately ranged from flask-shaped forms to individuals having two or more vesicular portions joined by longer or shorter, thick-walled tubular parts. Cercarial embryos filled most of their vesicular portions. The cercaria was tailless, and devoid of a stylus. On escaping from the mollusk it as completely encapsulated in mucous which sustained it for about six days. On being ingested by any of the several species of terrestrial mollusks available, the cercaria reentered the tissues and encysted as a metacercaria. These metacercariae developed into young flukes (some with eggs) within one, two or three weeks after being fed to larval (aquatic) stages of host salamanders, Eurycea bislineata cirrigera (Green) and Desmognathus fusca fusca Rafnesque.

Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ethologie animale
Catégories Scopus
  • 1 - Life Sciences ; 2 - Immunology and Microbiology ; 3 - Parasitology
Identifiant ISTEX
E2AD0422CFA5EBBCCE14675A1AD8823047971C2D
Revue

Zeitschrift für Parasitenkunde

Année de publication
1967
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
10
Sous-corpus
  • Mollusques
Type de publication
Journal
ark:/67375/1BB-DMXB9DQJ-5
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