International Journal of Biometeorology

, Volume 24, Issue 4, pp 341–346 | Cite as

Weather and the ecology of bursate nematodes

  • N. D. Levine
Article

Abstract

The free-living stages of bursate nematodes are affected in different ways by meteorological factors. The eggs and 1st and 2nd stage larvae live in the feces, and these factors act on them through the feces. The embryo in the egg is protected by the eggshell. The 1st and 2nd stage larvae feed on micro-organisms, and are affected by the species of microorganisms and their metabolic products. The 3rd stage, infective larvae do not feed but leave the feces and migrate onto the vegetation, where they are more directly affected by meteorological factors than the earlier stages. They are partially protected by their sheath. The degree day concept can be used to predict the length of time required for development to the infective stage. Under constant conditions at 100% relative humidity and 20–35° C,Trichostrongylus colubriformis requires 90–115 degree days (temperature times number of days) to reach the infective stage, andHaemonchus contortus requires 95–144 degree days. The great majority of eggs dies within the 1st day after reaching pasture, altho most of them would develop to the infective stage in the laboratory. Only 0.03% ofH. contortus andT. colubriformis eggs placed on pasture were recovered from the vegetation as infective larvae. When larvae ofH. contortus were placed on pasture, 1.6% (about 50 times as many but still only aout 1/30 of their potential) were later recovered. The cause of this die-off is unknown. Two types of potential worm burden prediction must be made-general and specific. The former can be made on the basis of temperature and moisture, but the latter requires information on many modifying factors.

Keywords

Relative Humidity Plant Physiology Stage Larva Great Majority Metabolic Product 

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References

  1. DESCHIENS, R. (1939): Considérations relatives à la destruction des larves de nématodes parasites par des hyphomycètes prédateurs. Bull. Soc. Path. exot., 32: 459–464.Google Scholar
  2. DOLFUSS, R. P. (1946): Parasites (animaux et végétaux) des helminthes. Lechevalier, Paris, 482 pp.Google Scholar
  3. DUDDINGTON, C. L. (1960): Biological control-predaceous fungi. In: Nematology. J. N. Sasser and W. R. Jenkins (ed.). Univ. North Carolina Press, Chapel Hill, 461–465.Google Scholar
  4. GIBSON, T. E. (1978): The ecology of the free-living stages of parasitic nematodes. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.) W. Meteor. Org. Tech. Note No. 159: 58–61, Geneva.Google Scholar
  5. GIBSON, T. E. and SMITH, L. P. (1978): Forecasting outbreaks of parasitic gastroenteritis in ruminants in England and Wales. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.) W. Meteor. Org. Tech. Note No. 159: 76–77, Geneva.Google Scholar
  6. HOPE CAWDERY, M. J., GETTINBY, G. and GRAINGER, J. N. R. (1978): Mathematical models for predicting the prevalence of liver-fluke disease and its control for biological and meteorological data. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.). W. Meteor. Org. Tech. Note No. 159: 21–35, Geneva.Google Scholar
  7. HSU, C. K. and LEVINE, N. D. (1977): Degree-day concept in development of infective larvae ofHaemonchus contortus andTrichostrongylus colubriformus under constant and cyclic conditions. Amer. J. vet. Res., 38: 1115–1119.Google Scholar
  8. LEIMBACHER, F. (1978): Experience with the “Mt” system of forecasting fascioliasis in France. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.). W. Meteor. Org. Tech. Note No. 159: 6–13, Geneva.Google Scholar
  9. LEVINE, N. D. (1963): Weather, climate and the bionomics of ruminant nematode larvae. Adv. vet. Sci., 8: 215–261.Google Scholar
  10. LEVINE, N. D. (1968): Nematode Parasites of Domestic Animals and of Man. Burgess Publ. Co., Minneapolis, 600 pp.Google Scholar
  11. LEVINE, N. D. (1978): The influence of weather on the bionomics of the freeliving stage of nematodes. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.). W. Meteor. Org. Tech. Note No. 159: 51–57, Geneva.Google Scholar
  12. LEVINE, N. D. and ANDERSEN, F. L. (1973): Development and survival ofTrichostrongylus colubriformis on pasture. J. Parasit., 59: 147–165.Google Scholar
  13. LEVINE, N. D. and TODD, K. S. Jr. (1975): Micrometeorological factors involved in development and survival of free-living stages of the sheep nematodesHaemonchus contortus andTrichostrongylus colubriformis. A review. Int. J. Biometeor., 19: 174–183.Google Scholar
  14. LEVINE, N. D., TODD, K. S., Jr. and BOATMAN, P. A. (1974): Development and survival ofHaemonchus contortus on pasture. Amer. J. Vet. Res. 35: 1413–1422.Google Scholar
  15. LÝSEK, H. (1978): The significance of ovicidal fungi in the epidemiology of geohelminthoses in man and animal. Short Com. Fourth Internat. Congr. Parasit., D: 59.Google Scholar
  16. OLLERENSHAW, C. B. (1974): Forecasting liver fluke disease. In: The effects of meteorological factors upon parasites. A. E. R. Taylor, and R. Muller (ed.). Symp. Brit. Soc. Parasit., 12: 33–52.Google Scholar
  17. OLLERENSHAW, C. B. and SMITH, L. P. (1966): An empirical approach to forecasting the incidence of nematodiriasis over England and Wales. Vet. Rec., 79: 536–540.Google Scholar
  18. OLLERENSHAW, C. B., GRAHAM, E. G. and SMITH, L. O. (1978): Forecasting the incidence of parasitic gastroenteritis in lambs England and Wales. Vet. Rec., 79: 536–540.Google Scholar
  19. PARNELL, I. W. and GORDON, H. M. (1963): Predaceous fungi: A possible method of biological control of parasitic nematodes. J. Helm., 37: 339–342.Google Scholar
  20. PRAMER, D. (1964): Nematode-trapping fungi. Science, 144: 382–388.Google Scholar
  21. ROSS, J. G. (1978): Stormont “wet-day” fluke forecasting. In: Weather and Parasitic Animal disease. T. E. Gibson, (ed.). W. Meteor. Org. Tech. Note No. 159: 14–20, Geneva.Google Scholar
  22. ROUBAUD, E. and DESCHIENS, R. (1939): Destruction des larves infectieuses d'ankylostomes et d'anguillules intestinales parDactylella ellipsospora. Bull. Soc. Path. exot., 32: 160–165.Google Scholar
  23. ROUBAUD, E. and DESCHIENS, R. (1941): Action des hyphomycètes prédateurs sur les larves de synthétocaules et de bunostomes. Bull. Soc. Path. exot., 34: 127–130.Google Scholar
  24. THOMAS, R. J. (1974). The role of climate in the epidemiology of nematode parasitism in the ruminants. In: The effects of Meteorological Factors upon Parasites. A. E. R. Taylor and R. Muller (ed.) Symp. Brit. Soc. Parasit., 12: 13–32.Google Scholar
  25. THOMAS, R. J. (1978): Forecasting the onset of nematodiriasis in sheep. In: Weather and parasitic animal disease. T. E. Gibson (ed.). W. Meteor. Org. Tech. Note No. 159: 68–73, Geneva.Google Scholar
  26. THOMAS, R. J. and STARR, J. R. (1978): Forecasting the peak of gastrointestinal nematode infection in lambs. Vet. Rec., 103: 465–468.Google Scholar
  27. WANG, G. T. (1968): Effects of microbes and gases on the free-living stages ofTrichostrongylus colubriformus andHaemonchus contortus. Ph. D. Thesis, University of Illinois, Urbana. 123 pp.Google Scholar
  28. WILLIAMSON, M. H. and WILSON, R. A. (1978): The use of mathematical models for predicting the incidence of fascioliasis. In: Weather and Parasitic Animal Disease. T. E. Gibson (ed.). W. Meteor. Org. Tech. Note No. 159: 39–48, Geneva.Google Scholar

Copyright information

© Swets & Zeitlinger B.V. 1980

Authors and Affiliations

  • N. D. Levine
    • 1
  1. 1.College of Veterinary Medicine and Agricultural Experiment StationUniversity of IllinoisUrbanaUSA

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