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* These are mainly used for pest control in crop protection schemes. The above two drugs though are both currently used for flea control.
 
* These are mainly used for pest control in crop protection schemes. The above two drugs though are both currently used for flea control.
 
* They work by stimulating and then blocking post-synaptic nicotinic acetylcholine receptors which leads to paralysis and death.
 
* They work by stimulating and then blocking post-synaptic nicotinic acetylcholine receptors which leads to paralysis and death.
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'''Phenylpyrazoles - Fipronil, Pyripole'''
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* These are used for flea control and work by blocking GABA transmitted impulses, thus blocking the influx of chlorine ione into nerve cells.
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'''Macrocyclic Lactones - avermectins and milbemycins'''
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* These are endectocides are will be discussed in full on the anti-helminth pages.
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'''Amidines - Amitraz'''
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* This has limited action in veterinary medicine.
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* It works by acting on octoparamine receptor sites, these are within parasite muscles, resulting in increased nervous activity, spasming and death.
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===Inert Inorganics===
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These are inert substances, often powder, that are used to treat the environment in a properly managed flea control scheme. They work by dessication of the flea eggs or by clogging their spiracles. An example is '''Sodium polyborate'''.
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===Insect Growth Regulators===
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'''Insect juvenile hormone analogues - methoprene, pyriproxyfen'''
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These work by blocking receptor sites for insect juvenile hormone. This stops the juvenile insect from continuing along it's natural form of devlopment and never reaching adult status.
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'''Chitin Inhibitors - Cyromazine, dicyclanil, lufenuron'''
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These likewise block insect development by preventing the insect access to chitin, one of the key components to an adult insect's exoskeleton.
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==Points to Consider When Choosing an Ectoparasiticide==
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