REFERENCES
Andrews, S. J.,
Hole, N. J. K.,
Munn, E. A. and
Rolph, T. P. (
1995).
Vaccination of sheep against haemonchosis with H11, a gut membrane-derived protective antigen from the adult parasite: prevention of the periparturient rise and colostral transfer of protective immunity.
International Journal for Parasitology
25,
839–846.
Andrews, S. J.,
Rolph, T. P. and
Munn, E. A. (
1997).
Duration of protective immunity against ovine haemonchosis following vaccination with the nematode gut membrane antigen H11.
Research in Veterinary Science
62,
223–227.
Bird, J.,
Shulaw, W. P.,
Pope, W. F. and
Bremer, C. A. (
2001).
Control of anthelmintic resistant endoparasites in a commercial sheep flock through parasite community replacement.
Veterinary Parasitology
97,
219–225.
Bisset, S. A.,
Vlassoff, A.,
West, C. J. and
Morrison, L. (
1997).
Epidemiology of nematodosis in Romney lambs selectively bred for resistance or susceptibility to nematode infection.
Veterinary Parasitology
70,
255–269.
Blattman, A. N.,
Hulme, D. J.,
Kinghorn, B. P.,
Woolaston, R. R.,
Gray, G. D. and
Beh, K. J. (
1993).
A search for associations between major histocompatibility complex restriction fragment length polymorphism bands and resistance to Haemonchus contortus infection in sheep.
Animal Genetics
24,
277–282.
Buitkamp, J.,
Filmether, P.,
Stear, M. J. and
Epplen, J. T. (
1996).
Class I and class II major histocompatibility complex alleles are associated with faecal egg counts following natural, predominantly Ostertagia circumcincta infection.
Parasitology Research
82,
693–696.
Coop, R. L. and
Kyriazakis, I. (
2001).
Influence of host nutrition on the development and consequences of nematode parasitism in ruminants.
Trends in Parasitology
17,
325–330.
Coppin, H. L.,
Carmichael, P.,
Lombardi, G.,
L'faqihi, F. E.,
Salter, R.,
Parham, P.,
Lechler, R. I. and
de Preval, C. (
1993).
Position 71 in the alpha helix of the DR beta domain is predicted to influence peptide binding and plays a central role in allorecognition.
European Journal for Immunology
23,
343–349.
Datta, F. U.,
Nolan, J. V.,
Rowe, J. B.,
Gray, G. D. and
Crook, B. J. (
1999).
Long-term effects of short-term provision of protein-enriched diets on resistance to nematode infection and live-weight gain and wool growth in sheep.
International. Journal for Parasitology
29,
479–488.
Eady, S. J.,
Woolaston, R. R. and
Barger, I. A. (
2003).
Comparison of genetic and nongenetic strategies for control of gastrointestinal nematodes of sheep.
Livestock Production Science
81,
11–23.
Githigia, S. M.,
Thamsborg, S. M.,
Larsen, M.,
Kyvsgaard, N. C. and
Nansen, P. (
1997).
The preventative effect of the fungus Duddingtonia flagrans on trichostrongyle infections of lambs on pasture.
International Journal for Parasitology
27,
931–939.
Good, B.,
Hanrahan, J. P.,
Crowley, B. A. and
Mulcahy, G. (
2004).
Texel sheep are more resistant than Suffolks to natural helminth challenge based on faecal egg count and nematode burden. Manuscript submitted to Parasitology.
Grain, F.,
Nain, M.-C.,
Labonne, M.-P.,
Lantier, F.,
Lechopier, P.,
Gebuhrer, L.,
Asso, J.,
Maddox, J. and
Betuel, H. (
1993).
Restriction fragment length polymorphism of DQB and DRB class II genes of the ovine major histocompatibility complex.
Animal Genetics
24,
377–384.
Groeneveld, E. (
1990).
PEST User's Manual, Version 3.1.
Hanrahan, J. P. and
Crowley, B. A. (
1999).
Evidence for breed differences in resistance to nematode parasitism. Sheep and Goat Commission of European Association for Animal Production (50th Annual Meeting) Session IV, 4 pp.
Hulme, D. J.,
Windon, R. G.,
Nicholas, F. W. and
Beh, K. J. (
1991).
Association between MHC Class II RFLP and Trichostrongylus resistance. In
Breeding for Disease Resistance in Sheep
(ed. Gray, G. D. & Woolaston, R. R.), pp.
115–120.
Australian Wool Corporation,
Melbourne.
Kahn, L. P.,
Knox, M. R.,
Gray, G. D.,
Lea, J. M. and
Walkden-Brown, S. W. (
2003).
Enhancing immunity to parasites in single-bearing Merino ewes through nutrition and genetic selection.
Veterinary Parasitology
112,
211–225.
Knox, D. P.,
Redmond, D. L.,
Newlands, G. F.,
Skuce, P. J.,
Pettit, D. and
Smith, W. D. (
2003).
The nature and prospects for gut membrane proteins as vaccine candidates for Haemonchus contortus and other ruminant trichotrongyloids.
International Journal for Parasitology
33,
1129–1137.
Konnai, S.,
Nagaoka, Y.,
Takesima, S.,
Onuma, M. and
Aida, Y. (
2003 a).
Sequences and diversity of 17 new Ovar-DRB1 alleles from three breeds of sheep.
European Journal for Immunogenetics
30,
275–282.
Konnai, S.,
Nagaoka, Y.,
Takesima, S.,
Onuma, M. and
Aida, Y. (
2003 b).
Technical note: DNA typing for ovine MHC DRB1 using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).
Journal of Dairy Science
86,
3362–3365.
Kostia, S.,
Kantanen, J.,
Kolkkala, M. and
Varvio, S. L. (
1998).
Applicability of SSCP analysis for MHC genotyping: fingerprinting of Ovar-DRB1 exon 2 alleles from Finnish and Russian breeds.
Animal Genetics
29,
453–455.
Krieger, J. I.,
Karr, R. W.,
Grey, M.,
Yu, W.-Y.,
O'Sullivan, D.,
Batovsky, L.,
Zheng, Z.-L.,
Colon, S. M.,
Gaeta, F. C. A.,
Sidney, J.,
Albertson, M.,
Del Guercio, M.-F.,
Chesnut, R. W. and
Sette, A. (
1991).
Single amino acid changes in DR and antigen define residues critical for peptide-MHC binding and T cell recognition.
Journal of Immunology
146,
2331–2340.
Larsen, M.,
Faedo, M.,
Waller, P. J. and
Hennessy, D. R. (
1998).
The potential of nematophagous fungi to control the free-living stages of nematode parasites of sheep: Studies with Duddingtonia flagrans.
Veterinary Parasitology
76,
121–128.
MINISTRY OF AGRICULTURE, FISHERIES AND FOOD (
1986)
Manual of Veterinary Parasitological Laboratory Techniques, 3rd Edn.
Niezen, J. H.,
Robertson, H. A.,
Waghorn, G. C. and
Charleston, W. A. (
1998).
Production, faecal egg counts and worm burdens of ewe lambs which grazed six contrasting forages.
Veterinary Parasitology
80,
15–27.
Outteridge, P. M.,
Andersson, L.,
Douch, P. G.,
Green, R. S.,
Gwakisa, P. S.,
Hohenhaus, M. A. and
Mikko, S. (
1996).
The PCR typing of MHC-DRB genes in the sheep using primers for an intronic microsatellite: application to nematode parasite resistance.
Immunology and Cell Biology
74,
330–336.
Pena, M. T.,
Miller, J. E.,
Fontenot, M. E.,
Gillespie, A. and
Larsen, M. (
2002).
Evaluation of Duddingtonia flagrans in reducing infective larvae of Haemonchus contortus in faeces of sheep.
Veterinary Parasitology
103,
259–265.
SAS (
1989).
SAS/STAT User's Guide, Version 6, Fourth Edition, Vol. 2.
SAS Institute Inc.,
Cary, NC,
USA.
Sauermann, U.,
Stahl-Hennig, C.,
Stolte, N.,
Muhl, T.,
Krawczak, M.,
Spring, M.,
Fuchs, D.,
Kaup, F. J.,
Hunsmann, G. and
Sopper, S. (
2000).
Homozygosity for a conserved MHC class II DQ-DRB haplotype is associated with rapid disease progression in simian immunodeficiency virus-infected macaques: results from a prospective study.
Journal of Infectious Diseases
182,
716–724.
Schwaiger, F.-W.,
Buitkamp, J.,
Weyers, E. and
Epplen, J. T. (
1993).
Typing of the artiodactyl MHC-DRB genes with the help of intronic simple repeated DNA sequences.
Molecular Ecology
2,
55–59.
Schwaiger, F.-W.,
Gostomski, D.,
Stear, M. J.,
Duncan, J. L.,
McKellar, Q. A.,
Epplen, J. T. and
Buitkamp, J. (
1995).
An ovine major histocompatibility complex DRB1 allele is associated with low faecal egg counts following natural, predominantly Ostertagia circumcincta infection.
International Journal for Parasitology
25,
815–822.
Stear, M. J.,
Bairden, K.,
Bishop, S. C.,
Buitkamp, J.,
Epplen, J. T.,
Gostomski, D.,
McKellar, A. Q.,
Schwaiger, F.-W. and
Wallace, D. S. (
1996).
An ovine lymphocyte antigen is associated with reduced faecal egg counts in four-month-old lambs following natural, predominantly Ostertagia circumcincta infection.
International Journal for Parasitology
26,
423–428.
Steel, R. G. D. and
Torrie, J. H. (
1960).
Principles and Procedures of Statistics.
McGraw-Hill Book Company Inc.,
New York.
Stern, L. J.,
Brown, J. H.,
Jardetzky, T. S.,
Gorga, J. C.,
Urban, R. G.,
Strominger, J. L. and
Wiley, D. C. (
1994).
Crystal structure of the human class II MHC protein HLA-DR1 complexed with an influenza virus peptide.
Nature, London
368,
215–221.
Thorsby, E. (
1999).
MHC structure and function.
Transplantation Proceedings
31,
713–716.
Thursz, M. R.,
Thomas, H. C.,
Greenwood, B. M. and
Hill, A. V. (
1997).
Heterozygote advantage for HLA class-II type in hepatitis B virus infection.
Nature Genetics
17,
11–12.
Walling, G. A.,
Wilson, A. D.,
McTeir, T. L. and
Bishop, S. C. (
2004).
Increased heterozygosity and allelic variants are seen in Texels compared to Suffolk sheep.
Heredity
92,
102–109.
