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Moisture and temperature requirements in faeces for the development of free-living stages of gastrointestinal nematodes of sheep, cattle and deer

Published online by Cambridge University Press:  05 June 2009

C.E. Rossanigo  and
L. Gruner
C.E. Rossanigo
Affiliation:
INRA, Station de Pathologie Aviaire et de Parasitologie, 37380 Nouzilly, France
L. Gruner*
Affiliation:
INRA, Station de Pathologie Aviaire et de Parasitologie, 37380 Nouzilly, France
*
**Author for correspondence.
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Abstract

Isolates from eight gastrointestinal nematode species parasitic in sheep, cattle and deer were maintained in sheep, to provide eggs in similar faecal environments and to compare temperature and moisture requirements for their development. Faecal cultures were processed at different temperatures (for four species) and moisture contents (for eight species). At 60% of faecal moisture content (FMC), maximal rates of development (expressed as L3/100 hatchable eggs estimated by an extraction technique from the faeves) were observed at 20, 23 and 28°C respectively for Ostertagia leptospicularis, O. ostertagi, Teladorsagia circumcinctaand Trichostrongylus colunriformis. For the eight species, the curves of development rates as functions of FMC were Gaussian, without modification between 18 and 28°C. Optimal developments were when the FMC ranged from 57 to 68%; low development of 1L3/100eggs were observed when the FMC ranged from 85 to 95% and from 25 to 55%. The main differences between species were in the ability of the eggs of Teladorsagia circumcincta, Trichostrongylus colubriformis, T. vitrinusand Chabertia ovina to develop at lower FMC than Haemonchus contortus, O. ostertagi, O. legptospicularis and Cooperia oncophora.

Type
Research Papers
Information
Journal of Helminthology , Volume 69 , Issue 4 , December 1995 , pp. 357 - 362
Copyright
Copyright © Cambridge University Press 1995

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