The epidemiology and control of cattle nematode infections


Ostertagia ostertagi is the most prevalent (>90%) and pathogenic parasitic nematode in cattle in temperate regions. Calves in their first grazing season are the most susceptible to Ostertagia infections, often showing obvious signs of disease such as inappetence, dull hair coat, diarrhoea and weight loss. In second season grazing cattle and adult cows infections are usually subclinical, but can cause reduced growth or milk production. The Laboratory of Parasitology has gained a clear understanding of the infection patterns and the epidemiology of gastrointestinal nematode infections in calves in Western Europe and the preventive measures that are commonly applied to control these parasites. Recently, a project has been started to develop and evaluate diagnostic methods as tools that estimate production losses caused by nematode infections in adult dairy cows.
The main objectives of the present research are:
(1) the evaluation of the (persistent) efficacy of new (formulations of) anthelmintics in cattle, both in natural grazing conditions and in artificial infection experiments;
(2) the evaluation of serum pepsinogen levels as a tool for monitoring preventive anthelmintic strategies
(3) the evaluation of a milk anti-O. ostertagi ELISA as a method to assess morbidity in adult dairy cows.




Name Role Start End
Vercruysse, Jozef member
Claerebout, Edwin member


Name Role Start End
Laboratory of Parasitology member 2009-07-01


Reference Role
Geurden, T., Claerebout, E., Deroover, E., Vercruysse, J., 2004. Evaluation of the chemoprophylactic efficacy of 10% long acting injectable moxidectin against gastrointestinal nematode infections in calves in Belgium. Vet Parasitol 120, 331-338. author
Charlier, J., Duchateau, L., Claerebout, E., Vercruysse, J., 2005. Assessment of the repeatability of a milk Ostertagia ostertagi ELISA and effects of sample preparation. Prev Vet Med 68, 277-288. author
Charlier, J., Claerebout, E., Duchateau, L., Vercruysse, J., 2005. A survey to determine relationships between bulk tank milk antibodies against Ostertagia ostertagi and milk production parameters. Vet Parasitol 129, 67-75. author
Charlier, J., Claerebout, E., De Meulenaere, E., Vercruysse, J., 2005. Associations between dairy herd management factors and bulk tank milk antibody levels against Ostertagia ostertagi. Vet Parasitol 133, 91-100. author
Forbes A.B., Charlier J., Vercruysse J., 2006. Bulk milk ELISAs for quantitative estimates of parasite infection. Cattle Practice 14, 167-173. author
Charlier J., Duchateau L., Claerebout E., Vercruysse J., 2007. Predicting milk-production responses after an autumn treatment of pastured dairy herds with eprinomectin. Vet Parasitol 143, 197-390. author
Charlier J., De Meulemeester L., Claerebout E., Williams D., Vercruysse J., 2008. Qualitative and quantitative evaluation of coprological and serological techniques for the diagnosis of fasciolosis in cattle. Vet Parasitol 153, 44-51. author
Forbes A.B., Vercruysse J., Charlier J., 2008. A survey of the exposure to Ostertagia ostertagi in dairy cow herds in Europe through the measurement of antibodies in milk samples from the bulk tank. Vet Parasitol, in press. author

created:2011-12-14 14:18:59 UTC, source:web

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