Papers by Felix Heckendorn
Die Behandlung von Magen-Darm-Parasiten ist auf vielen Schaf- und Ziegenbetrieben immer schwierig... more Die Behandlung von Magen-Darm-Parasiten ist auf vielen Schaf- und Ziegenbetrieben immer schwieriger; die noch wirksamen Medikamente werden knapp. Resistenzen gegen Entwurmungsmittel werden zunehmen. Für die Tierhalter ist es deshalb sehr wichtig, die Möglichkeiten der Vorsorge und des gezielten Einsatzes dieser Mittel zu kennen, um die Wirksamkeit der noch verfügbaren Medikamente möglichst lange zu erhalten
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Journal of Dairy Research
This research communication presents a study evaluating the effects of dried sainfoin (Onobrychis... more This research communication presents a study evaluating the effects of dried sainfoin (Onobrychis viciifolia) supplemented to dairy goats on their milking performance and feed protein efficiency under commercial conditions. During July and August 2015, a herd of 20 Alpine goats was divided into two treatments (n = 10), balanced by milk yield and days in milk. They were supplied with either 700 g/d sainfoin pellets (condensed tannins: 4.0 g/kg DM) or 700 g/d lucerne (Medicago sativa) pellets (condensed tannins: 0.3 g/kg DM). The goats remained in one herd and were separated by treatments only during milking. In the milking parlour each goat received 350 g of the respective pellets, twice daily. During the day, the herd had 5 h access to a high-quality pasture (crude protein >200 g/kg DM), whilst during the rest of the day and the night animals were housed and offered grass hay ad libitum. The experiment lasted for seven weeks. Individual milk yields and composition were controlled...
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65th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA 2017), 2017
Oak and Walnut are both of ethnoveterinary importance, especially for anthelmintic treatment of r... more Oak and Walnut are both of ethnoveterinary importance, especially for anthelmintic treatment of ruminants [1,2]. H2O and EtOH-water (1:1) extracts of oak and walnut foliage were used for phytochemical profiling and for in vitro assays with Caenorhabditis elegans and gastrointestinal nematodes (GIN). Oak extracts contained mainly tannins, walnut extracts were dominated by flavonoids. Oak EtOH extract caused significant lethal effects in adult C. elegans (LC50 1.5 mg/mL); motility of GIN L3 larvae was reduced by the EtOH extract but at substantially higher concentrations. Egg hatching was inhibited by both, the oak H2O and EtOH extract. In vivo: 42 lactating Alpine goats carrying natural GIN infections were allocated to 3 feeding groups: oak, walnut and control. Freshly harvested branches with foliage were offered to goats of the respective groups twice a day for a total of 17 days. Individual foliage intake and fecal egg counts (FEC) was performed every 2 – 3 days. Oak and walnut foliage feeding did not lead to a significant reduction of FEC. Time sampling data revealed a substantial variability in leaf intake between goats for both, oak and walnut, which however, did not coincide with the hypothesis that goats with heavy GIN infections consume more leaf material than animals with light infections. Summarizing these results suggests an anthelmintic activity of oak due to the presence of tannins which points to a preventive effect by limiting development of pasture dwelling GIN parasitic stages. Adult GIN within the host do not seem to be affected with the quantities used in the study.
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Le traitement des parasites gastro-intestinaux devient de plus en plus difficile dans de nombreux... more Le traitement des parasites gastro-intestinaux devient de plus en plus difficile dans de nombreux elevages d'ovins et de caprins ; les vermifuges qui sont encore efficaces se font rares et la resistance a ceux-ci augmentera encore si aucune precaution n’est prise. Il est donc tres important que les eleveurs soient conscients des possibilites preventives existantes et surtout de leur utilisation ciblee afin de maintenir leur efficacite le plus longtemps possible.
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Infections with gastrointestinal nematodes (GIN) represent a major constraint in sheep husbandry.... more Infections with gastrointestinal nematodes (GIN) represent a major constraint in sheep husbandry. The present thesis investigates the control of these parasites by means of tanniferous fodder plants. Such alternative control strategies are urgently needed because of the emergence of nematode populations resistant to chemical synthetical anthelmintic drugs. Non-chemical control of GIN is also of crucial importance in organic agriculture, where the use of synthetical compounds is restricted.
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Zeitschrift für Phytotherapie, 2016
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Organic Agriculture, 2020
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Les chèvres peuvent se défendre contre les parasites en mangeant certaines plantes. Ces plantes p... more Les chèvres peuvent se défendre contre les parasites en mangeant certaines plantes. Ces plantes pourraient être très utiles dans la production animale biologique
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Infections with gastrointestinal nematodes (GIN) represent a major constraint in sheep husbandry.... more Infections with gastrointestinal nematodes (GIN) represent a major constraint in sheep husbandry. For many years, the control of these parasites has solely relied on the repeated use of synthetic anthelmintics. However, the emergence of resistant GIN populations and the increasing concern of consumers for drug residues in animal products have provided a strong impetus towards the development of alternative strategies to control GIN. Amongst those, the administration of tanniferous fodder plants to infected animals received prime attention in the last decade, and although a considerable body of knowledge on this strategy has been accumulated, many questions remain to be answered. In sheep and goats, the anthelmintic effects observed in response to tanniferous fodder administration are believed to be associated to condensed tannins (CTs), contained in the plants. Chemically these molecules belong to the polyphenols and are expressed by a range of fodder plants together with other seco...
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Estimer les besoins de son troupeau de chevres ou de moutons et la croissance de l’herbe permet d... more Estimer les besoins de son troupeau de chevres ou de moutons et la croissance de l’herbe permet de connaitre la surface de pâturage necessaire et d’optimiser l’utilisation de ses parcs. Que se passe-t-il quand il est necessaire de prendre en compte le cycle des vers gastro-intestinaux sur des surfaces fortement infestees ?
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La fiche technique montre comment les vers gastro-intestinaux des ovins et caprins peuvent etre r... more La fiche technique montre comment les vers gastro-intestinaux des ovins et caprins peuvent etre regules de maniere durable selon les connaissances actuelles et comment la formation d'une resistance des parasites peut etre retardee. La fiche technique aborde egalement des possibilites et des limites de la legumineuse fourragere sainfoin.
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Parasites des petits ruminants: comment attenuer la formation de resistances aux vermifuges.
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La qualite de la viande des agneaux de boucherie depend d’un grand nombre de facteurs. Outre l’âg... more La qualite de la viande des agneaux de boucherie depend d’un grand nombre de facteurs. Outre l’âge au moment de l’abattage et le sexe, l’affouragement a une incidence preponderante. En principe, un affouragement constitue principalement de cereales, compare a du fourrage plutot grossier, provoque les plus grandes differences dans la qualite de la viande. Une autre influence tres discutee sur la qualite de la viande est la race; on dit que les races primitives comme le Heidschnucke ont une qualite de viande elevee, se rapprochant de celle du gibier. Certaines races primitives suisses ont egalement la reputation d’avoir une viande particulierement bonne. Cet article traite de la question de savoir si la viande d’agneau des races Nez Noir du Valais, Blancs des Alpes, mouton de l’Engadine et mouton Miroir se distingue au niveau de la qualite.
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Papers by Felix Heckendorn