Inheritance of fecal egg count and packed cell volume and their relationship with production traits in sheep infected with Haemonchus contortus

Journal of Animal Science
H B VanimisettiD R Notter

Abstract

This study describes responses to artificial infection with Haemonchus contortus in ewes and lambs of 50% Dorset, 25% Rambouillet, and 25% Finn-sheep ancestry and provides estimates of genetic parameters for measures of parasite resistance. One hundred ninety-eight ewes out of 64 sires, and 386 lambs out of 25 sires were evaluated in autumn and spring of 2 yr. Ewes were dewormed shortly after weaning their lambs and lambs were dewormed at about 120 d of age. One week after deworming, ewes and lambs were dosed with approximately 10,000 infective larvae of H. contortus. After infection, BW, fecal egg counts (FEC), and packed cell volume (PCV) were measured weekly for 7 wk in lambs kept in drylot and fortnightly for 11 wk in ewes on pasture. Summary traits were defined as initial PCV, mean BW across all times, and means for PCV (MPCV) and log-transformed FEC (MLFEC) at wk 3 to 7 after infection for lambs and wk 3 to 11 after infection for ewes. Ewes and lambs did not lose weight overall in any year or season, but there was no consistent effect of year or lambing season on mean LFEC or mean PCV during infection in either ewes or lambs. Yearling ewes were less resistant to infection than older ewes, with lower PCV (P < 0.05) and hig...Continue Reading

References

Oct 1, 1987·International Journal for Parasitology·G A AlbersI A Barger
Apr 1, 1987·International Journal for Parasitology·I A Barger, K M Dash
Feb 1, 1985·International Journal for Parasitology·C H CourtneyR P Herd
Aug 1, 1984·International Journal for Parasitology·C H CourtneyR P Herd
Aug 1, 1984·Veterinary Parasitology·I A Barger, H W Cox
Jul 1, 1993·International Journal for Parasitology·I A Barger

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Citations

Apr 1, 2009·Genetics and Molecular Biology·Raimundo N B LôboJosé M da Silva
Sep 9, 2016·Journal of Parasitic Diseases : Official Organ of the Indian Society for Parasitology·Bashir A LoneAbida Khan
Feb 9, 2017·Journal of Animal Science·D R NotterJ L M Morgan
Apr 15, 2015·Tropical Animal Health and Production·Tesfaye GetachewDavid Russell Notter
Apr 4, 2017·International Journal of Molecular Sciences·Ali Akbar BhuiyanXiaoyong Du
Aug 28, 2019·Journal of Veterinary Internal Medicine·Lisa C ViesselmannDeanna M W Schaefer
Jul 15, 2016·Journal of Parasitic Diseases : Official Organ of the Indian Society for Parasitology·K V SubramaniSubhash Chandra
Mar 7, 2015·Parasite : Journal De La Société Française De Parasitologie·Samuel N ChiejinaBarineme B Fakae
Oct 17, 2019·BMC Genomics·Zaira M Estrada-ReyesRaluca G Mateescu
Jan 17, 2017·Animal : an International Journal of Animal Bioscience·A TraoréF Goyache
Feb 8, 2020·The Veterinary Clinics of North America. Food Animal Practice·Joan M Burke, James E Miller
Dec 15, 2020·Veterinary Parasitology : Regional Studies and Reports·Michael LalramhlunaRuma Jas
Sep 10, 2020·Veterinary Parasitology: X·João Henrique Barbosa ToscanoAna Carolina de Souza Chagas

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