Abstract
The aim of this study was to determine the resistance to worm infection in Santa Inês sheep by combining different sets of gastrointestinal parasite resistance indicator traits, using the k-means algorithm. Records from 221 animals reared in the Mid-North sub-region of Brazil were used. The following phenotypes were used: hematocrit (HCT); white blood cell count; red blood cell count (RBC); hemoglobin (HGB); platelets; mean corpuscular hemoglobin; mean corpuscular volume; mean corpuscular hemoglobin concentration; fecal egg count (FEC); coloration of the ocular mucosa (FAMACHA score); body condition score (BCS); withers height; and rump height. Two files with phenotypic information of animals were edited: complete, including all traits, and reduced, in which only FAMACHA score, HCT, FEC, and BCS were used. For determination of worm resistance, three groups were formed using the k-means non-hierarchical clustering by combining the traits of the complete and reduced analyses. The animals of the group in which individuals had the lowest values for FEC and FAMACHA score, as well as the highest values for HCT, RBC, HGB, and BCS were classified as resistant. In the group with opposite values for the aforementioned traits, the animals...Continue Reading
References
Oct 1, 1987·International Journal for Parasitology·G A AlbersI A Barger
Mar 17, 2004·Veterinary Parasitology·A F T AmaranteS M Gennari
Jul 22, 2004·Veterinary Parasitology·R M KaplanA F Vatta
Aug 16, 2005·Veterinary Parasitology·P A BricarelloS M Gennari
Apr 17, 2009·Veterinary Parasitology·M B MolentoC C Pires
May 19, 2009·Veterinary Parasitology·D G Riley, J A Van Wyk
Aug 7, 2009·Veterinary Parasitology·A F T AmaranteA V Pires
Dec 31, 2009·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·César Cristiano BassettoAlessandro Francisco Talamini do Amarante
Mar 23, 2012·Veterinary Parasitology·I K IdikaL A Ngongeh
Dec 19, 2012·Frontiers in Genetics·Stephen C Bishop
Mar 25, 2014·Research in Veterinary Science·R González-GarduñoA J Chay-Canul
Jul 30, 2014·PLoS Biology·Adam D HaywardAndrea L Graham
Dec 4, 2014·Veterinary Parasitology·M P CorneliusR B Besier
Jul 21, 2017·Journal of Animal Science·S I MortimerG M Gaunt
Sep 8, 2017·Journal of Animal Science and Biotechnology·Mariana Piatto BertonJosé Bento Sterman Ferraz