With the increasing challenge of lungworm and other parasites on Irish farms, people are looking for solutions. However, understanding what you are using is the only way to make an informed decision. Traditionally, farmers turned to pour-on anthelmintic for parasite control, however, they should be aware that pour-on formulations have disadvantages in some key areas.
Extrinsic factors are things that can influence bioavailability and efficacy of a product that are outside of the animal (not related to the animal’s health or metabolism). Minimising extrinsic forces should be a top priority on any farm to reduce variability of a treatment. If using a pour-on product, inaccurate dosing or variability in dosage across the herd can occur due to the rain wash-off or licking reducing the amount of product on the animal that is available for absorption. Licking can have an impact on the dose delivered to an animal when using a pour-on and can potentially cause variability (Laffont et al 2001), this can contribute to anthelmintic resistance.
Licking has proven to be a major influence on the absorption of pour-on anthelmintic. This makes the systemic availability of pour-ons more variable and unpredictable. Allogrooming (cows licking one another) can result in cross-contamination of animals, giving rise to unexpected drug residues in edible tissues of untreated cattle, and undesirable subtherapeutic concentrations reaching cows. Pour-on formulations often result in variability in dosage which is contributor to drug resistance (Laffont et al 2001). Precise dosing can be achieved with Eprecis, preventing sub dosing and guaranteeing effective drug levels into the cow.
Ireland is a country of volatile weather and rain is a frequent and unpredictable occurrence. With a busy silage season fast approaching, farmers have enough on their mind and do not need the hassle of having to worry about rain for their cows as well as their silage. Rain can have significant impacts on the available dose of a pour-on if it is washed off. When a herd begins to cough with lungworm, swift and effective treatment is necessary. An injectable such as Eprecis will enable a farmer to reliably treat his herd without waiting for favourable weather.
Laffont, C.M., Alvinerie, M., Bousquet-Mélou, A. and Toutain, P.L., 2001. Licking behavior and environmental contamination arising from pour-on ivermectin for cattle. International journal for parasitology, 31(14), pp.1687-1692.