Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-23T19:32:34.306Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Excretory System and Life History of Lecithodendrium chilostomum (Mehl.) and other Bat Trematodes, with a Note on the Life History of Dicrocoelium dendriticum (Rudolphi)

Published online by Cambridge University Press:  06 April 2009

F. J. Brown
F. J. Brown
Affiliation:
The Molteno Institute for Research in Parasitology, University of Cambridge.
Get access Rights & Permissions [Opens in a new window]

Extract

1. The life history of Lecithodendrium chilostomum has been established; C. Lecithodendrii chilostomi penetrates a second intermediate host, the larva of Phryganea grandis, and unlike other stylet cercariae does not encyst, but feeds and grows in the host tissue as a mobile metacercaria. During pupation of the host in the following year these mobile forms migrate from the abdominal segments of the larva to the thorax, where they then encyst in the thoracic muscles in which they are also found in the imago. The largest metacercariae and the excysted worms are typical early adult Lecithodendrium chilostomum. No case of progenesis in the metacercaria was found.

2. It is estimated that the maximum swarming of the cercariae probably occurs during July, when first penetration of the intermediate host takes place. Subsequent diminished swarming and penetration proceed until November. The life of the larval trematode as a mobile metacercaria is approximately 8 months; the imagines of Phryganea grandis emerge during May and June, the infective period for the final host.

3. The metacercariae are not distributed throughout the body cavity of their larval host, but the majority are confined to the three posterior segments.

4. Limnophilus rhombicus may also serve as a second intermediate host, but the infection is very light and the metacercariae do not encyst during pupation of this host.

5. The excretory system has been determined in all stages of Lecithodendrium chilostomum; it is of the 2 (6 × 2) type. The occurrence of this type of system in other groups of cercariae is reviewed and since it is found in several widely separated families, it is suggested that its presence does not necessarily imply relationship, but is due to convergence.

6. The life histories of the following bat trematodes are indicated: Lecitho-dendrium lagena, Plagiorchis vespertilionis and Crepidostomum moeticus.

7. The life history of Dicrocoelium dendriticum is discussed.

Type
Research Article
Information
Parasitology , Volume 25 , Issue 3 , July 1933 , pp. 317 - 328
Copyright
Copyright © Cambridge University Press 1933

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Braun, M. (1879–1993). In Bronn's Klassen und Ordnungen des Thierreichs, IV (l a), Trematodes.Google Scholar
Brown, F. J. (1926). Some British freshwater larval trematodes with contributions to their life histories. Parasitology, 18, 21–34.CrossRefGoogle Scholar
Brown, F. J. (1927). On Crepidostomum farionis (O. F. Müll.) (= Stephanophiala laureata Zeder), a Distome parasite of the trout and grayling. I. The life history. Parasitology, 19, 86–99.CrossRefGoogle Scholar
Cameron, T. W. M. (1931). Experimental infection of sheep with Dicrocoelium dendriticum. J. of Helminthology, 9, 41–44.CrossRefGoogle Scholar
Faust, E. C. (1929). Human Helminthology. Philadelphia.CrossRefGoogle Scholar
Looss, A. (1894). Die Distomen unserer Fische und Frösche. Bibliotheca Zoologica, VI (16), 1–296.Google Scholar
Lühe, M. (1909). Parasitische Plattwurmer. Die Süsswasserfauna Deutschlands, Heft 17, Trematodes.Google Scholar
Macy, R. W. (1931). New bat trematodes of the genera Plagiorchis, Limatulum and Dicro-coelium. J. Parasitol. Urbana, 4, 28–33.CrossRefGoogle Scholar
Nicoll, W. (1923). A reference list of the trematode parasites of British Mammals. Parasitology, 15, 236–252.CrossRefGoogle Scholar
Nicoll, W. (1927). A reference list of the trematode parasites of Man and the Primates. Parasitology, 19, 338–351.CrossRefGoogle Scholar
Nöller, W. (1929). Befunde bei Schnecken von Thüringer Schafweiden in einem Lanzet–tegelgebiete. Tierärztl. Rdsch. 35, 26, 485–489.Google Scholar
Sewell, R. B. (1922). Cercariae Indicae. Indian J. Med. Research. 10, Supplt.Google Scholar
Skriabine, K. I. (1915). Contribution á la biologie d'un Trématode Lecithodendrium chilo-stomum (Mehl. 1831). C.R. Soc. Biol. 78, 751–754.Google Scholar
Vogel, H. (1929). Beobachtungen über Cercaria vitrina und deren Beziehung zum Lanzet-tegelproblem. Arch. Schiffs- u. Tropenhyg. 33, 474–489.Google Scholar