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Anthelmintics are drugs that expel parasitic worms (helminths) from the body, by either killing or stunning them. A traditional remedy of this type is often called a vermifuge or vermicide.
Additional recommended knowledge
Examples of drugs used as anthelmintics include:
Many members of the piperazine family are successful anthelmintics.
Natural anthelmintics include black walnut, wormwood (Artemisia absynthium), clove (Syzygium aromaticum), tansy tea (Tanacetum vulgare), Hagenia (Hagenia abyssinica), kalonji (Nigella sativa) seeds, and the male fern (Dryopteris filix-mas). In Brazilian folk medicine, Plumeria P. acutifolia or P. rubra is also an anthelmintic.  Please note that many natural vermifuges or anthelmintics are poisonous and, in improper dosages, dangerous to humans as well as parasites.
The ability of worms to survive treatments that are generally effective at the recommended dose rate.
It is considered a major threat to the current future control of worm parasites of small ruminants and horses.
Development of Resistance
Treatment eliminates worms whose genotype renders them susceptible -Worms that are resistant survive and pass on their "resistance" genes
Resistant worms accumulate and finally treatment failure occurs -Clinical definition= <95% reduction in Fecal Egg Count
What causes Resistance?
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Anthelmintic". A list of authors is available in Wikipedia.|