Comparison of Four Diagnostic Methods for Detection and Relative Quantification of Eggs in Feces Samples.

We compared four methods for identification of eggs. With increased trade in animals within and between countries and continents, it has become important to correctly identify eggs in fecal samples. To validate the outcome of diagnostic tests, sheep feces ( = 38) were collected from naturally infected flocks in Sweden.

The emergence of resistance to the benzimidazole anthlemintics in parasitic nematodes of livestock is characterised by multiple independent hard and soft selective sweeps.

Anthelmintic resistance is a major problem for the control of parasitic nematodes of livestock and of growing concern for human parasite control. However, there is little understanding of how resistance arises and spreads or of the "genetic signature" of selection for this group of important pathogens. We have investigated these questions in the system for which anthelmintic resistance is most advanced; benzimidazole resistance in the sheep parasites Haemonchus contortus and Teladorsagia circumcincta.