Testing the Effectiveness of Dewormer

 

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Checking for Resistance

Anthelmintic resistance is when the drug no longer works because the worms have developed a tolerance or resistance to it. Anthelmintic resistance is determined by a fecal egg count reduction test (FECRT). Animals are weighed and treated with the anthelmintics and fecal egg counts are conducted at the time of treatment and 7 to 14 days after treatment. If the anthelmintic kills 90 percent or more of the worm eggs, it is considered to be effective. If it kills 60 to 90 percent of worm eggs, it is considered to have a moderate level of resistance. Anthelmintics killing less than 60 percent of worm eggs are considered to have severe resistance.

 The FAMACHA system monitors clinical anemia (reduction of red blood cells, packed cell volume) by examining the color of the goat's lower eyelids and comparing it to a color-coded chart. Variation in eyelid color from pale to red indicates the degree of anemia. Based on this chart, only goats with anemia should be treated. This practice will prevent the overuse of anthelmintics and consequently minimize chances of parasite resistance to anthelmintics. The test has an effectiveness of 90 percent compared to the 20-30 percent effectiveness of overused anthelmintics.
References:
  • Article 1- Purdue University - Managing Internal Parasitism in Sheep and Goats
  • Article 2 -Alabama A&M University Cooperative Extension System - BARBER POLE WORM INFESTATION IN GOATS
  • Article 3 -Virginia-Maryland Regional College of Veterinary Medicine
    Virginia Tech, -     Controlling Goat Parasites
  • Article 4 -Division of Parasitology and Tropical Veterinary Medicine, Utrecht University,  Utrecht, The Netherlands. – Effects of Mowing
  • Article 5 - EU study -  Parasites and Tannins
  • Article 6 - University of Maryland - Integrated Parasite Management (IPM) in Small Ruminants
  • Article 7 - Louisiana State University – Internal and External Parasites in Goats
  • Article 8 -SAC Research – Nutrition and Parasites
  • Article 9 -Terry Hutchens Extension Associate for Goat Production UK & KSU Terry Hutchens Extension Associate for Goat Production UK & KSU - Gastro-Intestinal Parasite Survival Kit For Goats
  • Article 10 -Animal Nutrition and Health Team SAC, Edinburgh - Opportunities to reduce gastrointestinal nematode parasitism through nutrition
  •  Article 11 -National Sustainable Agriculture Information - Managing Internal Parasites in Sheep and Goats
  •  Article 12 -NSW Department of Primary Industries, Armidale1 NSW Department of Primary Industries, Armidale1 NSW Department of Primary Industries, Armidale, Australia – Turning the Worm
  • Article 13 - Texas A&M University - Understanding Internal Parasites
  • Article 14 - Helminth Parasites in the New Zealand Meat & Wool Pastoral Industries : A Review of Current Issues