Faecal egg counts and immune markers in a line of Scottish Cashmere goats selected for resistance to gastrointestinal nematode parasite infection

David McBean (Corresponding Author), Mintu Nath, Fiona Kenyon, Karina Zile, David J. Bartley, Frank Jackson

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study aimed to investigate the effect of selection for low faecal egg count (FEC) in Scottish Cashmere goats in comparison to a control line of unselected goats grazing the same pasture. Goats from generations F2 through to F9 were monitored for FEC, bodyweight, peripheral eosinophilia and IgG, IgA and IgE response against Teladorsagia circumcincta from the end of their first grazing season, through winter housing (during which a single artificial challenge dose of 10,000 drug susceptible T. circumcincta was given) and the following full grazing season. The study demonstrated that selected line animals excreted a significantly lower number of parasite eggs (P<0.01) in the majority of generations examined. Liveweight productivity was unaffected by selection. Although selected line animals had greater numbers of circulating eosinophils in many of the generations (four generations of males and six generations of females, P<0.05), there was no direct link between eosinophilia and reduced FEC. Immunoglobulin levels showed no consistent difference between selected and control lines. IgG, IgA and IgE levels were not different between lines over the whole dataset (P>0.05), although the selected line had significantly elevated or reduced levels (P<0.05) for all three within individual generations. There were significant associations between increased IgG and reduced FEC under artificial infection conditions (P=0.02). Increased IgA was also significantly associated with elevated FEC during the second grazing season (P<0.001). The study demonstrates that selection produced a line of goats with consistently reduced FEC compared with control animals, but did not identify a clear relationship between any of the immune markers measured and faecal egg output.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalVeterinary Parasitology
Volume229
Early online date17 Sep 2016
DOIs
Publication statusPublished - 15 Oct 2016

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Cashmere (goat breed)
Nematode Infections
Parasitic Diseases
fecal egg count
gastrointestinal nematodes
Goats
Ovum
Biomarkers
goats
parasites
grazing
Teladorsagia circumcincta
infection
Immunoglobulin A
Immunoglobulin G
eosinophilia
Eosinophilia
animals
Immunoglobulin E
Eggs

Keywords

  • Goats
  • Gastrointestinal nematodes
  • Selection

Cite this

Faecal egg counts and immune markers in a line of Scottish Cashmere goats selected for resistance to gastrointestinal nematode parasite infection. / McBean, David (Corresponding Author); Nath, Mintu; Kenyon, Fiona; Zile, Karina; Bartley, David J.; Jackson, Frank.

In: Veterinary Parasitology, Vol. 229, 15.10.2016, p. 1-8.

Research output: Contribution to journalArticle

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