More Information
A comparison of faecal egg count reduction test procedures
Authors: McKenna PBPublication: New Zealand Veterinary Journal, Volume 54, Issue 4, pp 202-203, Aug 2006
Publisher: Taylor and Francis
Animal type: Livestock, Production animal, Ruminant, Sheep
Subject Terms: Alimentary system/gastroenterology, Diagnostic procedures, Parasites - internal, Nematode
Article class: Correspondence
Abstract: Anthelmintic resistance in gastrointestinal nematode parasites of domestic livestock is usually detected in the field by means of a faecal egg count reduction test (FECRT). Basically, this test provides an indirect estimate of the efficacy of an anthelmintic by measuring the reduction in the faecal egg counts (FECs) of a group of animals following medication. Where this anthelmintic treatment results in a faecal egg count reduction (FECR) of less than 95%, anthelmintic resistance is generally considered to be present (McKenna 1990, 1994). Despite the inherent simplicity of the test there are a number of possible variants to the procedure that could affect its outcome and amongst the most fundamental of these is the formula used to calculate the FECR .