Non-systemic control of parasites
Use of agonists and antagonists of the nicotinergic acetylcholine receptors of insects for the non-systemic control of parasitic insects, such as fleas, lice and flies, on humans and on animals.
1. A method for non-systemically controlling a parasitic insect selected from fleas and lice on a human or animal, said method comprising contacting said parasitic insect with an effective amount therefor of a compound of the formula:
wherein
n represents 1 or 2;
Subst. represents halogen;
A represents hydrogen or alkyl having 1 to 4 carbon atoms; and
Z represents optionally substituted alkyl;
E represents NO 2 or CN; and
X represents —CH═ or —N═;
wherein said contacting of said parasitic insect with said compound is effected by:
a) topically applying said compound to the dermis of said human or animal; or
b) contacting the dermis of said human or animal with an article containing said compound;
and wherein said contacting of said parasitic insect with said compound does not result in said compound being systemically distributed within said human or animal.
2. The method according to claim 1 , which comprises contacting said parasitic insect with the compound:
3. The method according to claim 1 , wherein the animal is a dog or cat infested with fleas.
4. The method according to claim 3 , wherein said contacting is effected by applying said compound topically to the dermis of said dog or cat by a pour-on or spot-on method.
5. The method according to claim 3 , wherein said contacting is effected by contacting the dermis of said dog or cat with an article containing said compound.
6. The method according to claim 1 , which is carried out on a human, and the human is infected with lice.