On Sat, 14 Mar 2009 13:43:49 -0700, J. Waggle <[log in to unmask]> wrote:

>Even tick collars have benefit of treating your children with a dose of pesticide when they pet the dog or cat.

Well, that's one "advantage" of the new generation of imidacloprid
based pesticides in that they kill fleas but are safer for pets and
children.

> Organophosphates & Carbamates: These insecticides affect fleas (and other ectoparasites) via preventing the natural degradation of the neurotransmitter (acetylcholine) at neural junctions (synapses). The result is persistent neurotransmitter-mediated neural stimulation, resulting in hyperactivity, respiratory paralysis (due to muscle exhaustion), convulsions and death. Unfortunately, the same mechanism of activity can also result in toxicity and death to animals

> Imidacloprid interferes with the functionality of specific neurotransmitter receptors. By thus interfering with the signals between nerve cells and the essential functions they perform, the effect is death of the adult flea. It needs to be applied at 30 day intervals for maximum efficacy. Sometimes, when flea exposure is severe, more frequent application is necessary and apparently safe. ( e.g 3 week intervals...but do not apply more often than once weekly).

-- 
Peter L Borst

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