Manipulating small ruminant parasite epidemiology through the combination of nutritional strategies

Houdijk, J.G.M.; Kyriazakis, Ι.; Kidane, Alemayehu; Athanasiadou, Spiridoula

doi:10.1016/j.vetpar.2011.11.044

Cited by 52 publications

(34 citation statements)

References 127 publications

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“…The utilization of tannin-rich feeds or extracts has gained interest to modulate rumen ammonia production (Deaville et al, 2010;Theodoridou et al, 2010) or methane (Liu et al, 2011), to reduce methane emissions, or to limit intestinal parasites (Houdijk et al, 2012). Because tannins certainly affect ruminal fermentation, they might also alter milk and cheese FA composition (Vasta et al, 2008).…”

Section: Effects Of Tannin Extracts and Tannin-rich Foragementioning

confidence: 99%

Feeding strategies to design the fatty acid profile of sheep milk and cheese

et al. 2014

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-The majority of sheep milk produced in the world is transformed into cheese. Feeding is a major factor affecting the quality of sheep milk and, therefore, of sheep cheese. Because fat is the main compound of cheese, this review gives an update on the effects of feeding and nutrition on milk fat content and deeply discusses feeding strategies aimed at increasing the levels of healthy fatty acids (FA), such as conjugated linoleic acid and omega-3 FA, in milk and cheese in the human diet. In addition, the use of alternative feed resources such as by-products, aromatic plants, and phenolic compounds in the sheep diet and their effects on milk and cheese FA composition are also discussed. Among feeding strategies, grazing and the use of supplements rich in oils seem to be the best and the cheapest strategies to improve the nutritional value of the fatty acid profile in sheep cheese.

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Section: Effects Of Tannin Extracts and Tannin-rich Foragementioning

confidence: 99%

Feeding strategies to design the fatty acid profile of sheep milk and cheese

et al. 2014

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“…There are a few other methods of parasite control currently used in organic production systems, such as rational pasture management (Cabaret et al, 2002;Torres-Acosta & Hoste, 2008), exploitation of intrinsic/genetic resistance of sheep (Nowosad et al, 2003), or nutritional modulation of the host's immune responses and gut environment (Waller & Thamsborg, 2004). The latter refers to controlled grazing on bioactive forages or feeding condensed tannins as nutraceuticals (Min & Hart, 2003;Tzamaloukas et al, 2005;Torres-Acosta & Hoste, 2008;Houdijk et al, 2012), although controversy regarding the use of tannins is constantly rising as their excessive consumption has been associated with the reduction in food intake and digestibility as well as impaired rumen metabolism (Athanasiadou et al, 2007). Based on several earlier studies, certain plants are more effective against specifi c parasites than the others (Tzamaloukas et al, 2005;Athanasiadou et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Assessing the usefulness of mineral licks containing herbal extracts with anti-parasitic properties for the control of gastrointestinal helminths in grazing sheep – a field trial

et al. 2016

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SummaryOne of the alternative methods of parasite control, of particular importance in sustainable farming, is the use of medicinal plants. The specifi c aim of the present fi eld trial was to assess the anti-parasitic effects of herbal extracts contained in a commercially available lick formulation for sheep. At the outset of this study conducted during the grazing season, all animals were de-wormed and then randomly assigned to one of the two separately kept groups (treatment and control), each consisting of 25 animals (11 ewes and 14 lambs). The treatment group received mineral licks containing the extracts of the plants with anti-parasitic properties, while control animals received standard mineral licks ad libitum. Rectal fecal samples were collected monthly from all animals for the McMaster analyses. There were no signifi cant differences in the prevalence and intensity of helminth infections between the treatment and control groups. Thus, we were not able to ascertain the effi cacy of the commercial herbal de-wormer tested for the control of gastrointestinal helminths in grazing ewes and their lambs.

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“…Ewes receiving supranutritional Se yeast had lower percentages of H. contortus compared with ewes receiving less Se yeast, suggesting that supranutritional Se yeast may help the sheep control the severity of H. contortus infection. Nutrition and genetics also play important roles in sheep that are resistant to GI parasites [12,13,39]. Sheep from genetic lines that are resistant to H. contortus infection have a stronger induction of Th-2-related cytokine gene expression [39].…”

Section: Discussionmentioning

confidence: 99%

“…The nutritional status of the host plays an important role in controlling the severity of GI parasite infection in sheep [12,13]. Little is known how dietary micronutrients such as selenium (Se) affects GI parasite load in sheep.…”

Section: Introductionmentioning

confidence: 99%

Effect of Selenium Yeast Supplementation on Naturally Acquired Parasitic Infection in Ewes

Hooper

Bobe

Vorachek

et al. 2014

Biol Trace Elem Res

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Gastrointestinal parasites cause substantial economic losses in pasture-based sheep production systems. Supranutritional organic selenium (Se) supplementation may be beneficial because it improves immune responses to pathogens. To evaluate the effect of Se-yeast supplementation on gastrointestinal parasite load, 30 ewes per treatment group were drenched weekly with no Se, 4.9 mg Se/week as Se yeast (maximum FDA-allowed concentration), or supranutritional concentrations of Se yeast (14.7 and 24.5 mg Se/week) starting early fall for 85 weeks. Fecal samples were collected at weeks 63, 66, 78, and 84 and counted for total trichostrongyle-type eggs and Haemonchus contortus eggs (in samples with ≥200 trichostrongyle eggs/g feces). During breeding season (fall), ewes were kept on pasture; ewes receiving 24.5 mg Se/week had lower fecal trichostrongyle egg counts (93 ± 40 eggs/g feces) compared with ewes receiving no Se (537 ± 257 eggs/g feces; P = 0.007) or ewes receiving 4.9 mg Se/week as Se yeast (398 ± 208 eggs/g feces; P = 0.03). In winter, fecal trichostrongyle egg counts decreased, and group differences were not apparent. During lambing season (spring), ewes were kept in the barn and fecal trichostrongyle egg counts increased, although no group differences were observed. However, none of the ewes receiving supranutritional Se yeast, and with trichostrongyle egg counts ≥200 eggs/g of feces, but four of the ewes receiving lower Se dosages had H. contortus egg counts ≥1,000 eggs/g feces (P = 0.04). Our results suggest that supranutritional Se-yeast supplementation may enhance resistance to naturally occurring H. contortus gastrointestinal parasitism in sheep.

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Manipulating small ruminant parasite epidemiology through the combination of nutritional strategies

Cited by 52 publications

References 127 publications

Feeding strategies to design the fatty acid profile of sheep milk and cheese

Feeding strategies to design the fatty acid profile of sheep milk and cheese

Assessing the usefulness of mineral licks containing herbal extracts with anti-parasitic properties for the control of gastrointestinal helminths in grazing sheep – a field trial

Effect of Selenium Yeast Supplementation on Naturally Acquired Parasitic Infection in Ewes

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