Review and Evaluation of Antibody ELISA for Application on Serum Samples in First Season Grazing Calves.

The -Ab ELISA assay is widely used as a diagnostic tool for monitoring gastrointestinal (GI) nematodes using milk samples from adult dairy cows. This assay is potentially also useful to analyse serum samples from first-season grazing (FSG) calves, providing a more cost-effective and robust diagnostic technique than the current serum pepsinogen assay. However, a comprehensive evaluation of its use in serum samples from FSG calves has not yet been conducted.

To treat or not to treat: diagnostic thresholds in subclinical helminth infections of cattle.

Helminth infections of cattle place significant burdens on livestock production and farm economic efficiency. Heavy infections are relatively easy to detect and treat with anthelmintics. However, subclinical infections have major but often hidden impacts on animals, necessitating more refined diagnostics to detect them and ideally inform farmers about the likely impact of anthelmintic treatment on animal and herd performance.

Nonspecific binding of lac repressor to DNA. II. A small-angle neutron-scattering study.

Complexes between lac repressor and DNA fragments from mononucleosomes have been studied by small-angle neutron scattering. Both the radius of gyration and the molecular weight of the complexes were measured, and the experimental results were interpreted according to a model with two types of complex (M. Charlier and J.