Effects of breed and dietary protein supplementation on the responses to gastrointestinal nematode infections in Ethiopian sheep

Haile, Aynalem; Tembely, S.; Anindo, D.O.; Mukasa-Mugerwa, E.; Rege, J.E.O.; Yami, Alemu; Baker, R. L.

doi:10.1016/s0921-4488(02)00080-9

Cited by 45 publications

(30 citation statements)

References 22 publications

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“…Another limitation of this parameter is that in mixed infection, several trichostrongyle species are involved and eggs of these species cannot be distinguished morphologically. They also differ in fecundity, seasonality, Evaluation of resistance status of small ruminants Preston and Allonby, 1978;Barger, 1984;Zajac et al, 1988;Douch et al, 1995;Mugambi et al, 1996;Wanyangu et al, 1997;Miller et al, 1998;Haile et al, 2002;Matika et al, 2003;Vanimisetti et al, 2004;Amarante et al, 2005;Miller et al, 2006;Burke and Miller, 2008;Kemper et al, 2009 andHurtado et al, 2010;Saddiqi et al, 2010a and2010b. Packed cell volume Hoffman, 1981;Barger, 1984;Zajac et al, 1990;Gray et al, 1992;Mugambi et al, 1996 and2005;Wanyangu et al, 1997;Miller et al, 1998 andAmarante et al, 1999a;Notter et al, 2003;Bricarello et al, 2004 andGonzalez et al, 2008;Chiejina et al, 2010;Saddiqi et al, 2010a and2010b.…”

Section: Fecmentioning

confidence: 99%

“…Weight gain/loss as a criterion for natural resistance/resilience has been considered a useful tool by many workers (Li et al, 2001 andHaile et al, 2002;Chauhan et al, 2003;Matika et al, 2003;Notter et al, 2003). This parameter is feasible to perform besides FEC, as negative phenotypic correlations have been reported between FEC and live weight in Scottish Blackface lambs .…”

Section: Live Weightmentioning

confidence: 99%

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Markers/parameters for the evaluation of natural resistance status of small ruminants against gastrointestinal nematodes

Saddiqi¹,

Sarwar

Iqbal

et al. 2012

Animal

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The high prevalence of anthelmintic-resistant gastrointestinal nematodes (GINs) throughout the world has led to the need for alternative worm control strategies. One of the possible substitutes to reduce the problems of drug resistance and residue is the evaluation/breeding of small ruminants for greater resistance to the GINs (organically produced), which in turn would be a helpful tool to predict the performance of an animal. At present, the existing diversity in the genetic potential to resist/tolerate GINs infection both within and between breeds has been validated. Successful selection of animals to define the genotype and identified resistance is related to the employed markers. A number of phenotypic traits such as faecal egg count (FEC), worm burden, serum antibodies, peripheral eosinophilia, packed cell volume, live weight, serum protein and albumin concentrations have been used for this purpose both in natural and artificial infections. Relatively resistant/tolerant animals have also been found to have mastocytosis, globule leucocytes, high levels of histamine and immunoglobulin (Ig) A and IgE concentrations. Of these traits, the principal and most practical measurement used to assess resistance status in animals undergoing similar parasite challenges is FEC. FEC has a positive/negative correlation with other biochemical, cellular and immunological parameters; however, the reliability of individual trial is often questioned and valuable information regarding the genetic makeup can be obtained from pooled data of a large number of trials and parameters. This paper covers all the aspects reported in the literature on various parameters considered to evaluate the resistance status of a range of small ruminant breeds.

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Section: Fecmentioning

confidence: 99%

Section: Live Weightmentioning

confidence: 99%

Markers/parameters for the evaluation of natural resistance status of small ruminants against gastrointestinal nematodes

Saddiqi¹,

Sarwar

Iqbal

et al. 2012

Animal

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“…Variações observadas para valores de GPND podem ser atribuídas a diversos fatores: potencial genético dos cordeiros para ganho de peso (Santos et al, 1999), qualidade da dieta fornecida (Sá & Otto de Sá, 2002), sistema de produção (Macedo et al 1999), quantidade de leite produzida pelas ovelhas (Sañudo et al, 1998), contaminação ambiental por helmintos (Haile et al, 2002), número de crias por parto, idade de desmame (Sampaio & Oliveira, 2002) e época de desmame (Silva et al, 1993).…”

Section: Resultsunclassified

“…Segundo , o ganho de peso dos ovinos é crescente até os 90 dias de idade, fase de maior capacidade de crescimento. O GPND pode diminuir a partir dos 76 dias de vida, como efeito das infestações helmínticas em ambiente úmido (Boas, 1990), acentuado à medida em que se eleva a idade de desmame dos cordeiros (Haile et al, 2002 Tabela 2 -Ganho de peso diário no confinamento (GPC), em gramas, de acordo com a idade de desmame e o sexo (2000), Oliveira et al (1996) e Castillo et al (1973, que recomendam as faixas de 70 a 83 dias, de 70 a 84 dias e de 75 a 90 dias, respectivamente.…”

Section: Resultsunclassified

“…Para que os ovinos sejam desmamados mais cedo, o autor recomenda a suplementação exclusiva dos lactentes por meio do uso de alimentador privativo desde os dez dias de idade. De acordo com Neres et al (2001), esta prática eleva o ganho de peso, além de melhorar a resposta imunitária dos cordeiros frente às infecções verminóticas (Haile et al, 2002).…”

Section: Introductionunclassified

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Idade de desmame de cordeiros deslanados para terminação em confinamento, no litoral norte da Bahia

Freitas¹,

Oliveira²,

Jaeger³

et al. 2005

R. Bras. Zootec.

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RESUMO -Trinta e dois cordeiros (16 machos e 16 fêmeas) deslanados mestiços de Santa Inês, criados com as matrizes em pastagem de Brachiaria humidicola e suplementados em creep-feeding no período noturno, foram distribuídos em delineamento inteiramente casualizado, em esquema fatorial 4x2 -quatro idades de desmame (56, 70, 84 e 98 dias) e sexo, com o objetivo de determinar a melhor idade para o desmame desses animais. Ao desmame, os cordeiros foram confinados, até completarem 126 dias de vida, em baias individuais, onde receberam feno de Tifton 85 (Cynodon spp. cv Tifton 85), água e sal mineral ad libitum e ração concentrada na proporção de 2% do peso vivo. Houve efeito significativo da interação dos fatores idade de desmame e sexo sobre GPC e GPD, em que os cordeiros desmamados aos 84 dias foram superiores às cordeiras desmamadas com a mesma idade. Não se observou efeito significativo na interação dos fatores idade de desmame e sexo sobre GPND e CAC. Verificou-se efeito quadrático da idade de desmame para as variáveis GPND, GPD e CAC. Não se observou efeito significativo do sexo em nenhum dos parâmetros avaliados. A idade de desmame de 76 dias proporcionou maximização dos parâmetros GPND e GPD, enquanto a CAC mais eficiente foi observada nos animais desmamados aos 72 dias.Palavras-chave: alimentador restrito, Brachiaria, conversão alimentar, ovino Weaning Age on Fedlot Hair Sheep Lambs Performance in the Northern Litoral of BahiaABSTRACT -Thirty-two crossbred Santa Inês hair sheep lambs (16 males and 16 females) bred with their female progenitors on pasture of Brachiaria humidicola grass, supplemented in creep-feeding during the night, were allotted to a completely randomized design, in a factorial arrangement 4 x 2, four weaning ages (56, 70, 84 and 98 days) and sex to determine the best weaning age. At weaning, the lambs were confined in individual pens until 126 days old, when were daily fed Tifton 85 hay, water and mineral salt ad libitum and concentrate diet in the proportion of 2% body weight. There was a significant effect of weaning age vs sex interaction on DWC and DWG, where the males weaned at 84 days old were heavier than the females. No significant interaction of weaning age vs sex on DWBW and CFC was detected. Quadratic effects of weaning age on DWBW, DWG and CFC were noticed. No significant effect of sex on any of the studied parameters was detected. Seventy-six days weaned lambs maximized DWBW and DWG, while the most effective CFC was observed in seventy-two days weaned animals.

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Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites

Rouatbi

Romdhane

Bouaicha

et al. 2020

Veterinary Medicine & Sci

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In Tunisia, livestock plays an important role in the economy; unfortunately, Tunisian sheep population faces several health challenges. The aim of this trial was to study phenotypic variability of four local sheep breeds and strains to abomasum nematodes infection and to Babesia/Theileria parasites. Faeces, blood and abomasum contents were collected from 310 sheep slaughtered in eight commercial slaughterhouses across North Tunisia. Haematological and biochemical parameters were assessed. DNA was extracted and catch‐all primers were used to detect both Theileria spp. and Babesia spp. DNA. Faecal egg counts (FEC) was quantitatively assessed using simple flotation technique followed by McMaster technique. Male and female worms were collected from all abomasum contents and counted under a stereomicroscope. The percentage of faeces samples positive for GIN’s eggs was 30.82%. After worms’ recovery, the infection prevalence was estimated to 75.90%. The overall infection prevalence by Babesia spp. and Theileria spp. was 4.21%. The dispersion of observations plots obtained by principal component analysis (PCA) showed two clusters of individuals. The first cluster contains animals having positive Babesia/Theileria PCR, presence of nematodes in the abomasum contents and relatively low total worm count (TWC < 500) expect one animal which was found bearing high TWC (>500). In this same group, with a suspected form of resistance, animals showed normal values of albumin and normal haematological parameters (red blood cell count [RBC], haemoglobin [Hb] and packed cell volume [PCV]). The second cluster represents all the other observations in which subgroups of animals were distinguished on the basis of their potential resistance to abomasum nematodes. Multiple correlations showed significant positive correlations between RBC/Hb, RBC/PCV, PCV/Hb and FEC/TWC. Significant negative correlations were observed between TWC/RBC and TWC/Hb. It is concluded that the phenotypic variability among local sheep breeds is essential for more advanced genetic and genomic studies.

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Effects of breed and dietary protein supplementation on the responses to gastrointestinal nematode infections in Ethiopian sheep

Cited by 45 publications

References 22 publications

Markers/parameters for the evaluation of natural resistance status of small ruminants against gastrointestinal nematodes

Markers/parameters for the evaluation of natural resistance status of small ruminants against gastrointestinal nematodes

Idade de desmame de cordeiros deslanados para terminação em confinamento, no litoral norte da Bahia

Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites

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