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Egg sizes and differential egg counts in relation to sheep nematodes

Published online by Cambridge University Press:  06 April 2009

G. Cunliffe  and
H. D. Crofton
G. Cunliffe
Affiliation:
Department of Zoology, The University of Bristol
H. D. Crofton
Affiliation:
Department of Zoology, The University of Bristol
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Extract

1. The width and length of eggs of Haemonchus contortus, Cooperia curticei, Trichostrongylus axei, T. vitrinus, Bunostomum trigonocephalum, Chabertia ovina, Oesophagostomum venulosum and Ostertagia spp. were measured.

2. Frequency distributions of the linear dimensions of the eggs of each species are given, together with the frequencies calculated on the assumption that the distributions are normal.

3. A method of species differentiation based on egg measurements is described, the method being based upon the statistical chances of eggs of different species falling into particular size classes.

4. The application of the method and the construction of a classifying scale are described.

Type
Research Article
Information
Parasitology , Volume 43 , Issue 3-4 , November 1953 , pp. 275 - 286
Copyright
Copyright © Cambridge University Press 1953

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References

REFERENCES

Freeborn, S. B. & Stewart, M. A. (1937). The nematodes and certain other parasites of sheep. Bull. Calif. Agric. Exp. Sta. no. 603, 75 pp.Google Scholar
Gordon, H. McL. & Whitlock, H. V. (1939). A new technique for counting nematode eggs in sheep faeces. J. Coun. Sci. Industr. Res. Aust. 12, 50–2.Google Scholar
Kates, K. C. & Shorb, D. A. (1943). Indentification of eggs of nematodes parasitic in domestic sheep. J. Vet. Res. 4, 54–60.Google Scholar
Mönnig, H. O. (1934). Veterinary Helminthology and Entomology, 402 pp. London.Google Scholar
Ransom, B. H. (1911). The nematodes parasitic in the alimentary tract of cattle, sheep, and other ruminants. Bull. U.S. Bur. Anim. Ind. no. 127, 132 pp. illustrated.Google Scholar
Ross, C. I. & Gordon, H. McL. (1936). The Internal Parasites and Parasitic Diseases of Sheep, 230 pp., illustrated. Sydney.Google Scholar
Shorb, D. A. (1939). Differentiation of eggs of various genera of nematodes parasitic in domestic ruminants in the United States. Tech. Bull. U.S. Dep. Agric. no. 694.Google Scholar
Shorb, D. A. (1940). A comparative study of the eggs of various species of nematodes parasitic in domestic ruminants. J. Parasit. 26, 223–31.CrossRefGoogle Scholar
Stoll, N. R. (1930). On methods of counting nematode ova in sheep dung. J. Parasit. 22, 113–36.Google Scholar
Tetley, J. H. (1941 a). Haemonchus contortus eggs: comparison of those in utero with those recovered from faeces, and a statistical method for identifying H. contortus eggs in mixed infections. J. Parasit. 27, 453–64.CrossRefGoogle Scholar
Tetley, J. H. (1941 b). The differentiation of the eggs of the trichostrongylid species Nematodirus filicollis and N. spathiger. J. Parasit. 27, 473–80.CrossRefGoogle Scholar
Tetley, J. H. (1949). Rhythms in nematode parasitism of sheep. Bull. Dep. Sci. Industr. Res., N.Z., no. 96, pp. 214.Google Scholar