Effect of plant species on the larvae of gastrointestinal nematodes which parasitise sheep

Niezen, J.H.; Charleston, W.A.G.; Hodgson, J.; Miller, C.M.; Waghorn, T.S.; Robertson, Hugh A.

doi:10.1016/s0020-7519(98)00019-8

Cited by 68 publications

(38 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Em condições tropicais, o mesmo resultado foi encontrado, na Etiópia, por Sissay et al (2007), em que a hemoncose e a tricostrongilose (Trichostrongylus axei e T. colubriformis) foram as duas verminoses de maior ocorrência. Niezen et al (1998) observaram que a espécie da forrageira pode ter um impacto significativo na dinâmica populacional e na migração de larvas de T. colubriformis e Ostertagia circumcincta.…”

Section: Resultsunclassified

Nematódeos de ruminantes em pastagem com diferentes sistemas de pastejo com ovinos e bovinos

Torres

McManus

Amarante

et al. 2009

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar os efeitos de diferentes sistemas de pastejo, com ovinos e bovinos, sobre a quantidade de larvas no estágio L 3 de nematódeos de ruminantes. O delineamento experimental foi inteiramente ao acaso, em arranjo fatorial com quatro sistemas de pastejo e quatro períodos de rotação de pastagem. A duração do experimento foi de 91 dias, com sistema rotacionado (7 dias de ocupação e 21 de descanso), em 8 ha de Panicum maximum cv. Tanzânia. Foram avaliados os sistemas de pastejo: alternado, simultâneo e isolado, com ovinos e com bovinos. Foram utilizados 20 bovinos (mestiços), 30 cordeiros e 15 ovelhas adultas (raça Santa Inês). As amostras do capim, para recuperação e identificação dos nematódeos, foram realizadas semanalmente no pré e pós-pastejo dos piquetes. Na média geral de todos os manejos, a ordem decrescente de número de larvas foi: Haemonchus spp., Trichostrongylus spp., Oesophagostomum spp., Strongyloides spp. e Cooperia spp. Correlações médias foram encontradas entre as quantidades de larvas L 3 no pré e pós-pastejo. Com o aumento do número de rotações, houve aumento no grau de contaminação da pastagem pelas larvas, independentemente do sistema adotado. O sistema de pastejo simultâneo foi o que apresentou maior controle da carga parasitária de Haemonchus spp. na pastagem de capimtanzânia.Termos para indexação: Panicum maximum, forma de vida livre, nematódeo gastrintestinal. Ruminant nematodes in pasture under different grazing systems with sheep and cattleAbstract -The objective of this work was to evaluate the effect of different grazing management systems on the parasitic nematode load (L 3 larvae) in ruminants. The experimental design was completely randomized, in a factorial arrangement with four grazing systems and four rotations. The experimental period was 91 days, in a rotational system (7 days of occupation and 21 of days rest), in 8-ha pasture cultivated with Panicum maximum cv. Tanzânia. The different management systems evaluated were: alternate, simultaneous and isolate whit cattle and sheep. Twenty mixed breed cattle, 30 lambs and 15 ewes were used (Santa Inês breed). Grass samples were collected for recovery and identification of L 3 -larvae every week, during pre and postgrazing. In all systems, the decreasing order the number of identified larvae was Haemonchus spp., Trichostrongylus spp., Oesophagostomum spp., Strongyloides spp., and Cooperia spp. Mean correlations were found between L 3 -larvae numbers in pre and postgrazing. Increasing rotation caused increase in the degree of infection irrespectively of the system used. The simultaneous system had the best control on the parasitic load of Haemonchus spp., on Tanzania grass pasture.

show abstract

Section: Resultsunclassified

Nematódeos de ruminantes em pastagem com diferentes sistemas de pastejo com ovinos e bovinos

Torres

McManus

Amarante

et al. 2009

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…A shorter sward may have larger parasite burdens because it is easier for the parasites to migrate to the top (Niezen et al, 1998), so the non-supplemented animals might be at a higher risk of ingestion of nematode infective larvae. Nevertheless, as both experimental plots had the same previous management, they presumably had a similar parasitic status at the start of the trial.…”

Section: Discussionmentioning

confidence: 99%

Is the anthelmintic effect of heather supplementation to grazing goats always accompanied by anti-nutritional effects?

Frutos

Moreno-Gonzalo

Hervás

et al. 2008

Animal

View full text Add to dashboard Cite

To test the hypothesis that the beneficial anthelmintic effect of consuming moderate amounts of tannins may not always be accompanied by anti-nutritional effects in goats, two experiments were conducted. In the first, 48 Cashmere goats were randomly assigned to two treatments: supplementation with tannin-containing heather (6.4% total tannins) and non-supplementation. All goats grazed continuously from May to September under farm conditions in a mountainous area of northern Spain. The mean percentage of heather incorporated into the diet of the supplemented animals was 29.1%. Supplementation reduced the mean number of nematode eggs in faeces (P , 0.001) and the goat mortality rate (P , 0.05). The rumen ammonia concentration was markedly reduced in the goats receiving the heather supplement (160 v. 209 mg/l; P , 0.01), while volatile fatty acid (VFA) concentrations were significantly greater (63.0 v. 53.6 mmol total VFA/l; P , 0.05). The heather-supplemented goats also showed a lower loss of live weight (P , 0.01) and body condition score (P , 0.001). In the second experiment, batch cultures of rumen microorganisms with rumen fluid from nine goats whose diet included 29% heather -or not, were used to incubate three substrates (pasture, pasture 1 heather and pasture 1 heather 1 polyethylene glycol) to investigate in vitro ruminal fermentation. Differences (P , 0.01) among substrates were observed in terms of dry matter disappearance (DMD), in vitro true substrate digestibility (ivTSD), gas production and ammonia concentration, the greatest values always associated with the pasture substrate. Cultures involving rumen inoculum derived from goats receiving the heather-containing diet showed slightly lower DMD (46.9 v. 48.5 g/100 g; P , 0.05), ivTSD (64.6 v. 65.9 g/100 g; P , 0.10) and gas production (105 v. 118 ml/g; P , 0.001) values, but much greater total VFA concentrations (48.5 v. 39.3 mmol/l; P , 0.05), and suggest that the efficiency of ruminal fermentation in these animals was probably improved. Together, the results support the absence of a clear nutritional cost counteracting the beneficial anthelmintic effect of supplementing the diet of grazing goats with tannin-containing heather.

show abstract

“…Tropical legumes contain more condensed tannins than temperate legumes. Normally trees and shrubs contain higher levels of tannins than pasture grasses (Niezen et al 1998). …”

Section: Alternative Foragesmentioning

confidence: 99%

Internal parasite management in grazing livestock

et al. 2012

View full text Add to dashboard Cite

It is a challenging task to control internal parasites in grazing livestock even by applying multi label and multi directional approach. It is impossible to draw general recommendations to control parasitic diseases due to varied geo-climatic conditions and methods adopted for rearing the livestock in the country like India. In view of increasing incidence of anti-parasitic drug resistance in animals, there is an urgent need to design sustainable parasite control strategy which must include on the host as well as off the host control measures to harvest the maximum productivity from the animal for an indefinite period.

show abstract

Effect of plant species on the larvae of gastrointestinal nematodes which parasitise sheep

Cited by 68 publications

References 23 publications

Nematódeos de ruminantes em pastagem com diferentes sistemas de pastejo com ovinos e bovinos

Nematódeos de ruminantes em pastagem com diferentes sistemas de pastejo com ovinos e bovinos

Is the anthelmintic effect of heather supplementation to grazing goats always accompanied by anti-nutritional effects?

Internal parasite management in grazing livestock

Contact Info

Product

Resources

About