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Some Stages in the Development of Œsophagostomum dentatum from the Pig

Published online by Cambridge University Press:  18 November 2009

T. Goodey
T. Goodey
Affiliation:
Principal Research Assistant, Institute of Agricultural Parasitology, London School of Hygiene and Tropical Medicine.
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Extract

In an earlier paper (Goodey, 1924), the writer has given an account of the morphology of the adults of Œsophagostomum dentatum, the development and structure of the free-living larvæ and the biology of the ensheathed infective stage. So far, however, the parasitic larval stages have not been described. In the present paper some of the gaps in our knowledge of the complete life-history of the worm represented by these stages are filled in, not as completely as could be desired owing to the absence from the material of specimens showing the 3rd and 4th ecdyses. The worms found, however, show that the 4th stage larva has a provisional buccal capsule essentially similar to that found in 4th stage larvæ of O. radiatum (Marotel, 1908) and O. columbianum (Veglia, 1924), and in this respect is in line with certain other 4th stage larvæ of the Strongyloidea such as Ancylosloma duodenale (Looss, 1897), and Triodontophorus tenuicollis (Ortlepp, 1925), in which provisional buccal capsules built on the same general plan have been observed.

Type
Research Papers
Information
Journal of Helminthology , Volume 4 , Issue 4-5 , November 1926 , pp. 191 - 198
Copyright
Copyright © Cambridge University Press 1926

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References

Goodey, T., 1924.—“The Anatomy of Œsophagostomum dentatum (Rud.), a Nematode Parasite of the Pig, with Observations on the Structure and Biology of the free-living Larvæ” J. Helm., 2, pp. 1–14.CrossRefGoogle Scholar
Looss, A., 1897.—“Notizen zur Helminthologie Egyptens—II” Cent. f. Bakt., Abt., Bd. xxi., pp. 913–926.Google Scholar
Marotel, G., 1908.—“L'Œsophagostomose nodulaire” J. de Méd. Vet. et de Zootechnie, 12, pp. 522–534, 591–604.Google Scholar
Olt, 1898.—“Die entozoischen Follikularerkrankungen im Darme des Schweines” Zeitschr. f. Fleisch- u. Milchhyg., Berl., v. 8 (7), pp. 121–123.Google Scholar
Ortlepp, R. J., 1925.—“Observations on the Life History of Triodontophorus tenuicollis, a Nematode Parasite of the Horse” J. Helm., 3, pp. 1–14.CrossRefGoogle Scholar
Veglia, F., 1924.—“Preliminary Notes on the Life History of Œsophagostomum columbianum.” 9th and 10th Reports of the Director of Vet. Ed. and Res., Union of S. Af. Dept. of Agric, pp. 811–823.Google Scholar