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Regulation of egg production, worm burden, worm length and worm fecundity by host responses in sheep infected with Ostertagia circumcincta.
Following infection with Ostertagia circumcincta there was considerable variation in worm burdens, worm size and number of inhibited larvae even among sheep matched for age, sex, breed, farm of… Expand
Quantitative trait loci associated with parasitic infection in Scottish blackface sheep
This study aimed to identify quantitative trait loci associated with endoparasitic infection in Scottish Blackface sheep. Data were collected from 789 animals over a 3-year period. All of the animals… Expand
Genetic parameters for faecal egg count following mixed, natural, predominantly Ostertagia circumcincta infection and relationships with live weight in young lambs
Faecal egg counts and live weights were measured on approximately 200 predominantly twin-born Scottish Blackface lambs each year for 3 years, from 1 to 6 1'lonths of age. Measurements lvere made at… Expand
An ovine major histocompatibility complex DRB1 allele is associated with low faecal egg counts following natural, predominantly Ostertagia circumcincta infection.
- F. Schwaiger, D. Gostomski, +4 authors J. Buitkamp
- Biology, Medicine
- International journal for parasitology
- 1 July 1995
Infection with Ostertagia circumcincta is a major constraint on sheep production in temperate areas of the world. A potential control strategy is the use of genetically resistant sheep. Therefore we… Expand
Revealing the History of Sheep Domestication Using Retrovirus Integrations
Sheep retroviruses can be used to map the selective preferences of early farmers and trace livestock movements across Europe. Not Just Dinner on Legs Several thousand years ago, human beings realized… Expand
A microsatellite polymorphism in the gamma interferon gene is associated with resistance to gastrointestinal nematodes in a naturally-parasitized population of Soay sheep.
Free-living Soay sheep (Ovis aries) on the island of Hirta, St Kilda, Scotland, are naturally parasitized by gastrointestinal nematodes, predominantly Teladorsagia circumcincta. In this paper we show… Expand
The genetic control of IgA activity against Teladorsagia circumcincta and its association with parasite resistance in naturally infected sheep.
Previous studies in deliberately infected sheep have shown an association between IgA activity against 4th-stage larvae of Teladorsagia circumcincta and parasite growth, development and fecundity.… Expand
Alternatives to anthelmintics for the control of nematodes in livestock.
Efficient and welfare-friendly livestock production demands the control of nematode infection. Current control measures rely upon anthelmintic treatment but are threatened by the widespread evolution… Expand
Epidemiology of parasitic gastrointestinal nematode infections of ruminants on smallholder farms in central Kenya.
- J. Nginyi, J. Duncan, +4 authors P. Gatongi
- Biology, Medicine
- Research in veterinary science
- 1 February 2001
In order to establish the infection pattern with gastrointestinal nematodes in ruminants in the central Kenya highlands, a study was carried out in 58 smallholder farms. The study involved monthly… Expand
Genome-wide association and regional heritability mapping to identify loci underlying variation in nematode resistance and body weight in Scottish Blackface lambs
The genetic architecture underlying nematode resistance and body weight in Blackface lambs was evaluated comparing genome-wide association (GWA) and regional heritability mapping (RHM) approaches.… Expand