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AbstractFull Text

Anthelmintic resistance (AR) is an increasing problem worldwide especially for small ruminants and it is also rising in cattle. To maintain the efficacy of anthelmintics is an important objective. The current project aims at the investigation of the current efficacy of macrocyclic lactone...

Author(s)
Kleinschmidt, N.; Samson-Himmelstjerna, G. von; Demeler, J.; Koopmann, R.
Publisher
International Society of Organic Agricultural Research (ISOFAR), Bonn, Germany
Citation
Cultivating the future based on science. Volume 2: Livestock, socio-economy and cross disciplinary research in organic agriculture. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Conference in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio in Modena, Italy, 18-20 June, 2008, 2008, pp 90-92
Abstract

Faecal egg count reduction tests (FECRT) using ivermectin (IVM) and benzimidazole (BZ) were conducted to investigate the prevalence of anthelmintic resistance in gastro-intestinal nematodes on cattle farms in Germany, Belgium and Sweden in 2006 and 2007. Based on sufficient numbers of eggs prior to ...

Author(s)
Demeler, J.; Zeveren, A. M. J. van; Kleinschmidt, N.; Vercruysse, J.; Höglund, J.; Koopmann, R.; Cabaret, J.; Claerebout, E.; Areskog, M.; Samson-Himmelstjerna, G. von
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2009, 160, 1/2, pp 109-115
Abstract

Anthelmintic resistant cattle nematodes have been reported in different regions around the world. However, in Western Europe the assessment of the problem relies largely on case reports and no prevalence data based on wide-scale surveys are available. Therefore, we performed a survey to (1) screen...

Author(s)
El-Abdellati, A.; Charlier, J.; Geldhof, P.; Levecke, B.; Demeler, J.; Samson-Himmelstjerna, G. von; Claerebout, E.; Vercruysse, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 169, 3/4, pp 352-357
Abstract

Three different in vitro methods, the Larval Development Test (LDT), the Larval Migration Inhibition Test (LMIT) and the Micromotility Meter Test (MMT) have been adapted to detect anthelmintic resistance in cattle nematodes. Nematode eggs and third stage larvae of different Ostertagia ostertagi and ...

Author(s)
Demeler, J.; Küttler, U.; Samson-Himmelstjerna, G. von
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 170, 1/2, pp 61-70
Abstract

The objective of this study was to determine the prevailing levels of infection with Ostertagia ostertagi in first-season grazing calves and related management factors in three European countries (Belgium, Germany and Sweden). A cross-sectional survey was performed in first-season grazing dairy ...

Author(s)
Charlier, J.; Demeler, J.; Höglund, J.; Samson-Himmelstjerna, G. von; Dorny, P.; Vercruysse, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 171, 1/2, pp 91-98
Abstract

The productivity of young grazing cattle is mainly affected by infections with gastro-intestinal nematodes. Worldwide anthelmintic resistance (AR) is increasingly jeopardizing effective worm control in many regions. Detection of existing AR is the first step to postpone the spread of resistant...

Author(s)
Kleinschmidt, N.; Koopmann, R.; Demeler, J.; Samson-Himmelstjerna, G. von
Publisher
Johann Heinrich von Thunen Institute (vTI), Germany
Citation
Landbauforschung Völkenrode, 2010, 60, 3, pp 151-155
Abstract

In this survey, the epidemiology of gastrointestinal (GI) nematodes in dairy herds in five northwestern European countries was studied using a standardized Ostertagia ostertagi ELISA applied on bulk-tank milk, and a common questionnaire. The levels of exposure to GI nematodes were high in Belgium,...

Author(s)
Bennema, S. C.; Vercruysse, J.; Morgan, E.; Stafford, K.; Höglund, J.; Demeler, J.; Samson-Himmelstjerna, G. von; Charlier, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 173, 3/4, pp 247-254
Abstract

Resistance to anthelmintics is an increasing problem in sheep, goat and cattle industries worldwide. For parasite management on farms reliable methods for the detection of resistance are required and it is important that tests give comparable, reproducible and reliable results in different...

Author(s)
Demeler, J.; Küttler, U.; El-Abdellati, A.; Stafford, K.; Rydzik, A.; Varady, M.; Kenyon, F.; Coles, G.; Höglund, J.; Jackson, F.; Vercruysse, J.; Samson-Himmelstjerna, G. von
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 174, 1/2, pp 58-64
Abstract

The serum pepsinogen level is widely accepted as a useful parameter for monitoring gastrointestinal nematode infections in first-season grazing calves. However, several aspects, with possible implications for its practicality and the way to use the pepsinogen test, have received little attention to ...

Author(s)
Charlier, J.; Dorny, P.; Levecke, B.; Demeler, J.; Samson-Himmelstjerna, G. von; Höglund, J.; Vercruysse, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Research in Veterinary Science, 2011, 90, 3, pp 451-456
Abstract

Resistance to anthelmintic drugs, particularly to the widely used benzimidazoles (BZs) and macrocyclic lactones (MLs) is an increasing problem in cattle industries worldwide. Reliable methods for the assessment of anthelmintic efficacy in the field are required in order to react before resistance...

Author(s)
Demeler, J.; Kleinschmidt, N.; Küttler, U.; Koopmann, R.; Samson-Himmelstjerna, G. von
Publisher
Elsevier Ltd, Oxford, UK
Citation
Parasitology International, 2012, 61, 4, pp 614-618

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