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Marcadores fenot?picos para caracteriza??o de caprinos com diferentes n?veis de resist?ncia ?s endoparasitoses gastrintestinais / Phenotypic markers to characterizeE goats with different levels of resistance to gastrointestinal nematodes

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Previous issue date: 2012-02-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The aim of this study was to evaluate and characterize phenotypically goats with different levels of resistance to gastrointestinal nematodes. For a period of 93
days, 60 F2 goats originated from ? Saanen and ? Anglo- nubian animals were kept in the same area of pasture. Every seven days, feces and blood were collected for eggs
per gram counts of feces (EPG) and cultures of feces and to determinate the number of eosinophils, packed cell volume and total plasma protein, respectively. On the same
day, the animals were weighed and submitted to body score condition and FAMACHA method to worm control. Based on the average of EPG, the twelve animals with the highest average (susceptible group) and the twelve animals with the lowest average of EPG (resistant group) were selected, slaughtered and necropsied to recovery, counting andparasites identification. The resistant animals present lower EPG mean (P <0.0001) and 4.7 folder less parasites than susceptible animals. The resistant
group presented higher mean packed cell volume (26.48%) and total plasma protein (6.24 g / dl) than susceptible one (24,04% e 5,82g/dl, respectively). The average number of eosinophils was similar in both groups The Haemonchus sp. was the most prevalent in the culture of feces, followed by Trischostrongylus sp. and Oesophagostomum sp.. The counting of nematodes in the abomasum of susceptible group was higher than
in resistant one. The species identified were H. contortus in abomasums and T. colubriformis in small intestine. It can be concluded that EPG, packed cell volume and total plasma protein were useful phenotypic markers to identify animals as
resistant and susceptible to gastrointestinal nematodes infections / O presente trabalho teve como objetivo de avaliar e caracterizar
fenotipicamente caprinos com diferentes n?veis de resist?ncia a nematoides gastrintestinais. Em um per?odo de 93 dias, 60 caprinos F2 oriundos do cruzamento de animais ? Saanen e ? Anglo-nubiano foram mantidos em uma mesma ?rea de
pastagem cultivada irrigada de capim Tanz?nia (Panicum maximum Jacq. Cv Tanz?nia). A cada sete dias, fezes e sangue foram coletados para contagem de ovos por grama de
fezes (OPG), coproculturas, contagem de eosin?filos, determina??o de volume globular e prote?na plasm?tica total, respectivamente. No mesmo dia das coletas, os animais
foram pesados e avaliados quanto ao escore da condi??o corporal e grau de anemia com aux?lio no cart?o FAMACHA. Com base na m?dia de OPG, os doze animais com as maiores m?dias de OPG (grupo suscept?vel) e os doze animais com as menores m?dias de OPG (grupo resistente) foram identificados e selecionados para serem abatidos e necropsiados para a recupera??o, contagem e identifica??o dos parasitos presentes. Os animais pertencentes ao grupo resistente apresentaram menor m?dia de OPG (P<0,0001) e 4,7 vezes menos parasitos adultos do que os animais do grupo suscept?vel.
O grupo resistente obteve maior m?dia de volume globular (26,48%) e prote?na plasm?tica total (6,24 g/dl) do que os animais suscept?veis (24,04% e 5,82g/dl, respectivamente). A m?dia de eosin?filos foi semelhante nos dois grupos .O g?nero
Haemonchus foi o mais prevalente a nas coproculturas, seguido por Trischostrongylus e Oesophagostomum. A contagem de nematoides foi maior no abomaso do grupo suscept?vel do que no grupo resistente. As esp?cies identificadas foram H. contortus no
abomaso e T. colubriformis no intestino delgado. Conclui-se que OPG, volume globular e prote?na plasm?tica total foram marcadores fenot?picos eficientes para identificar animais resistentes e suscept?veis ?s infec??es causadas por nematoides gastrintestinais

Identiferoai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17171
Date28 February 2012
CreatorsCoutinho, Renata Maria Alves
ContributorsCPF:24554066878, http://lattes.cnpq.br/6775535046477169, Vieira, Luiz da Silva, CPF:07316925515, http://lattes.cnpq.br/5556932562390291, Cavalcanti, Elizete Teresinha Santos, CPF:10407340491, http://lattes.cnpq.br/5285394970592158, Souza, Maria de F?tima de, CPF:32308698420, http://lattes.cnpq.br/7011426083461968, Zaros, Lilian Giotto
PublisherUniversidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Produ??o Animal, UFRN, BR, Sistemas de Produ??o Sustent?veis no Semi-?rido; Caracteriza??o, conserva??o e melhoramento gen?tico
Source SetsIBICT Brazilian ETDs
LanguagePortuguese
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis
Formatapplication/pdf
Sourcereponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN
Rightsinfo:eu-repo/semantics/openAccess

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