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Further Observations on the Seasonal Variation in Worm Egg Output in Scottish Hill Sheep

Published online by Cambridge University Press:  05 June 2009

D. O. Morgan ,
I. W. Parnell  and
C. Rayski
D. O. Morgan
Affiliation:
Department of Zoology, University of Edinburgh.
I. W. Parnell
Affiliation:
Department of Zoology, University of Edinburgh.
C. Rayski
Affiliation:
Department of Zoology, University of Edinburgh.
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Extract

From the study of the worm egg output of nearly fifteen hundred sheep on many hill farms in Scotland it has been shown that:-

(i) Worm egg output in ewes and gimmers is lowest in early winter and highest in spring and early summer; this is followed by a marked decrease towards the winter months.

(ii) Generally in ewe hoggs the worm egg output is the same as that in older sheep, but shows greater variability; on occasion the spring peak may be absent.

(iii) The level of worm egg output of hoggs is generally higher than that of older sheep, and in this respect gimmers tend to fall between hoggs and ewes.

(iv) Weather conditions may have an influence on the height and duration of the spring peak of worm egg production.

Type
Research Article
Information
Journal of Helminthology , Volume 24 , Issue 3 , October 1950 , pp. 101 - 122
Copyright
Copyright © Cambridge University Press 1950

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References

REFERENCES

Cushnie, G. H., AND White, E. G., 1948.—“Seasonal Variations in Faeces Worm-Egg Counts of Sheep”. Vet. Rec. 60. 105–107. (W.L. 22523.)Google ScholarPubMed
Gordon, H. McL., 1948.—“The epidemiology of parasitic diseases, with special reference to studies with nematode parasites of sheep”. Austr. vet. J., 24, 17–45. (W.L. 2254a.)CrossRefGoogle Scholar
Gordon, H. McL., and Whitlock, , 1939.—“A new technique for counting nematode eggs in sheep faeces”. Jour. Court, sci. industr. Res. Aust., 12 50–52. (W.L. 11140a.)Google Scholar
Hawkins, P. A., Cole, C. L., Kline, E. E., AND Drudge, J. H., 1944.—“Studies of Sheep Parasites. I. The Course of Untreated Nematode Infections”. Vet. Med., 39. 154–161. (W.L. 22520.)Google Scholar
Hawkins, P. A., Cole, C. L., Kline, E. E., AND Drudge, J. H., 1944.—“Studies of sheep parasites. II. Winter treatment of the breeding flock”. Michigan Agric. Exp. St. Qu. Bull., 27, pp. 1–15.Google Scholar
Hawkins, P. A., AND Freitas, M. G. DE, 1947.—“Studies of Sheep Parasites. VIII. Overwintering of Nematode larvae”. J. Parasit. 33, (6 Sect. 2). (W.L. 11428.)Google Scholar
Morgan, D. O., AND Sloan, J. E. N., 1947.—“Research on Helminths in Hill Sheep with special reference to seasonal variations in Worm-egg output”. Scott. Agric., 27, 28–35. (W.L. 20010.)Google Scholar
Naerland, G., 1949.—“Nutrition in relation to nematode parasitism in sheep”. XlVth International Veterinary Congress, London, 1949. Section I (b), 1–6.Google Scholar
Schmid, F., 1933.—“Der Einfluss von Stall und Weidehaltung auf den Parasitenbefall bei Schafen, inbesondere bei Lammern”. Zbl. Bakt., 130, 338–349. (W.L. 23684.)Google Scholar
Seghetti, L., AND Marsh, H., 1945.—“Control of intestinal parasitism in lambs by winter treatment of ewes, as compared with the use of phenothiazine in salt in summer”. Amer. J. vet. Res., 6, 159–164.Google Scholar
Taylor, E. L., 1935.—“Seasonal Fluctuation in the number of Eggs of Trichostrongylid Worms in the Faeces of Ewes”. J. Parasit., 21, 175–179. (W.L. 11428.)CrossRefGoogle Scholar
Tetley, J. H., 1941.—“The Epidemiology of Low-Plane nematode infection in sheep in Manawatu District, New Zealand”. Cornell Vet., 31, 243–265. (W.L. 6888.)Google Scholar
Tetley, J. H., 1949.—“Rhythms in Nematode Parasitism of Sheep”. Dept. Sci. Industr. Res. N.Z. Bull., 96.Google Scholar