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Seasonal variations in the populations of infective larvae on pasture and the numbers of nematode eggs in the faeces of farmed goats

Published online by Cambridge University Press:  05 June 2009

Wahab A. Rahman  and
G. H. Collins
Wahab A. Rahman
Affiliation:
School of Biological Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
G. H. Collins
Affiliation:
Department of Veterinary Pathology, Faculty of Veterinary Science, University of Sydney, NSW, Australia
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Abstract

The levels of nematode egg production in goats and the availability of infective larvae (L3) on pasture were investigated on a dairy unit in New South Wales, Australia. The output of eggs by adult goats was always above 300 epg. The profile of the graph of larval availability in herbage paralleled those for temperature and rainfall, suggesting that larval peaks occurred when the temperature and availability of moisture were optimal. The dominant genus was Trichostrongylus, followed by Haemonchus, then Ostertagia. A larger proportion of Haemonchus larvae in the cultures of faeces were collected during the summer months.

Keywords

Goatnematode egg productioninfective larvaepasturetemperaturerainfallCooperiaHaemonchusOesophagostomumOstertagiaTrichostrongylus
Type
Research Article
Information
Journal of Helminthology , Volume 64 , Issue 3 , September 1990 , pp. 263 - 270
Copyright
Copyright © Cambridge University Press 1990

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