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Population dynamics of Trichostrongylus colubriformis and Ostertagia circumcincta in single and concurrent infections
Journal article   Peer reviewed

Population dynamics of Trichostrongylus colubriformis and Ostertagia circumcincta in single and concurrent infections

R.J. Dobson, E.H. Barnes and R.G. Windon
International Journal for Parasitology, Vol.22(7), pp.997-1004
1992
DOI: https://doi.org/10.1016/0020-7519(92)90059-T
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Abstract

Twenty-one-week-old worm-free pen-reared lambs were infected weekly with either 10,000 T. colubriformis larvae, 5000 O. circumcincta larvae, or with both species (15,000 larvae per week). Larval establishment and total worm burdens were estimated after 4, 7, 10 and 13 weeks of infection. Faecal egg counts and lamb bodyweights were measured weekly, and numbers of eosinophils in blood were estimated before infection and at weeks 5, 8 and 14. For both species of worms, the dynamics of infection (establishment, worm burdens, egg counts) were not affected by concurrent or pre-existing infection with the other species. Infection with T. colubriformis alone did not protect against O. circumcincta, but infection with O. circumcincta alone provided slight protection against the T. colubriformis larvae. Blood eosinophils increased between 5 and 8 weeks of infection and were similar for the three infections. This corresponded to the reduction in establishment for both species.

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Source: InCites

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Citation topics
1 Clinical & Life Sciences
1.163 Parasitology - General
1.163.1022 Anthelmintic Resistance
Web Of Science research areas
Parasitology
ESI research areas
Microbiology
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