Hostname: page-component-848d4c4894-2pzkn Total loading time: 0 Render date: 2024-05-25T14:54:42.228Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations on the bionomics of the free-living stages of Trichostrongylus vitrinus

Published online by Cambridge University Press:  18 November 2009

J. H. Rose  and
A. J. Small
J. H. Rose
Affiliation:
Central Veterinary Laborato, New Haw, Weybridge, Surrey KT 15 3NB, UK
A. J. Small
Affiliation:
Central Veterinary Laborato, New Haw, Weybridge, Surrey KT 15 3NB, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

Eggs of Trichostrongylus vitrinus in faecal pellets deposited on grass plots each month from April 1981 to March 1982 developed into infective larvae. From October to March development was slow and mortality of the pre-infective stages was very high. From April to September development was more rapid. The weather was generally dry and mortality of the pre-infective stages was high on plots with short herbage but was lower on most of the plots with long herbage, especially in July and August. In the laboratory, development of eggs into infective larvae was completed at temperatures ranging from 4°C to 27°C in faecal pellets which were either kept moist or dried out slowly, but not in faecal pellets which dried out rapidly. The rate of development increased as the temperature rose. Infective larvae survived for up to 16 months on the herbage of grass plots; some survived during very cold weather in the winter of 1981/82. In the laboratory, infective larvae suspended in tap water survived even longer at 4°C and 10°C but not at higher temperatures. They were rapidly killed by continuous freezing. They Survived for up to 8 weeks when subjected to desiccation, The relationship between climatic conditions and the development and survival of the free-living stages is discussed

Type
Research Article
Information
Journal of Helminthology , Volume 58 , Issue 1 , March 1984 , pp. 49 - 58
Copyright
Copyright © Cambridge University Press 1984

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

Al saqur, I., Bairden, K., Armour, J. & Gettinby, G. (1982) Population study of bovine Ostertagia spp. infective larvae on herbage and in soil. Research in Veterinary Science, 32, 332–337.CrossRefGoogle Scholar
Bairden, K., Parkins, J.J. & Armour, J. (1979) Bovine ostertagiasis a changing epidemiological pattern. Veterinary Record, 105, 33–35.Google Scholar
Callinan, A.P.L. (1979) The ecology of the free-living stages of Trichostrongylus vitrinus. International Journal for Parasitology, 9, 133–136.Google Scholar
Coop, R.L., Angus, K.W. & Sykes, A.R. (1979) Chronic infection with Trichostrongylus vitrinus in sheep. Pathological changes in the small intestine. Research in Veterinary Science, 26, 363–371.Google Scholar
Cornwell, R.L. (1975) The pattern of infection with gastro-intestinal nematodes in young fattening lambs at pasture. Research in Veterinary Science, 18, 1–5.Google Scholar
Crofton, H.D. (1955) Nematode parasite populations in sheep on lowland farms. II. Worm egg counts in lambs. Parasitology, 45, 99–115.CrossRefGoogle ScholarPubMed
Crofton, H.D. (1957) Nematode parasite populations in sheep on lowland farms III. The seasonal incidence of species. Parasitology, 47, 304–318.Google Scholar
Gibson, T.E. & Everett, G. (1967) The ecology of the free-living stages of Trichostrongylus colubriformis. Parasitology, 57, 533–547.Google Scholar
Parnell, I.W., Rayski, C., Dunn, A.M. & Mackintosh, G. (1954) A survey of the helminths of Scottish hill sheep. Journal of Helminthology, 28, 53–110.Google Scholar
Reid, J.F.S. & Armour, J. (1975) Seasonal variations in the gastro-intestinal nematode populations of Scottish hill sheep. Research in Veterinary Science, 18, 307–313.CrossRefGoogle Scholar
Rose, J.H. & Small, A.J. (1980) Observations on the development and survival of the free-living stages of Oesophagostomum dentatum both in their natural environments out-of-doors and under controlled conditions in the laboratory. Parasitology, 81, 507–517.CrossRefGoogle ScholarPubMed
Sykes, A.R., Coop, R.L. & Angus, K.W. (1979) Chronic infection with Trichostrongylus vitrinus in sheep. Some effects on food utilisation, skeletal growth and certain serum constituents. Research in Veterinary Science, 26, 372–377.Google Scholar
Taylor, S.M. & Cawthorne, R.J.G. (1972) Species of gastro-intestinal helminths of lambs in Northern Ireland. Journal of Helminthology, 46, 285–290.Google Scholar
Taylor, S.M. & Pearson, G.R. (1979) Trichostrongylus vitrinus in sheep. I. The location of nematodes during parasitic development and associated pathological changes in the small intestine during clinical infection. Journal of Comparative Pathology, 89, 397–412.Google Scholar