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Edited on Sun Jun-22-08 11:55 AM by kestrel91316
Can you cite links to controlled studies showing otherwise? Because we veterinarians would sure like to know if it we are dead wrong about mammalian physiology and toxicology. I cite below the info on Roundup in the vet website I use that was presented as part of a toxicology lecture at a vet conference:
~~~~~~~~~~~ Toxicity of Household Products International Veterinary Emergency and Critical Care Symposium 2006 Tina Wismer, DVM, DABVT, DABT ASPCA Animal Poison Control Center Urbana, IL, USA
Glyphosate (Pondmaster®, Rodeo®, Roundup®) is a general use herbicide. It is practically nontoxic by ingestion and dermal exposure. Glyphosate inhibits the shikimic acid pathway and since animals do not have this enzyme, it does not systemically harm them. Surfactants are irritating to the mucous membranes and skin and are responsible for most clinical signs (vomiting, diarrhea, oral irritation).
Glyphosate is poorly absorbed from the GI tract and is largely excreted unchanged in the urine. Urine may kill vegetation due to active glyphosate excretion. It can make toxic plants become much more palatable. Oral ingestions should be diluted with water or a small amount of milk. Large ingestions of the super concentrated glyphosate may result in oral ulcers from the surfactants, and mucosal protectants may be indicated.
~~~~~~~~~~~~~ kestrel again:
Deaths purportedly due to Roundup could possibly happen after ingestion of it, and then failure to treat the vomiting, diarrhea, and other symptoms due to surfactant irritation in an otherwise not well animal. In which case, Roundup would not be to blame, but rather inadequate medical care or preexisting disease. I imagine, for instance, an animal with significant kidney disease would not do well if it ingested Roundup during a summer heat wave and got into severe vomiting. That would end badly, but is not POISONING per se.
There are some VERY good reasons to avoid Roundup and other herbicides, but toxicity to pets is not one of them, IMHO.
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