Yep, CS works great on mastitis, so the FDA had to step in to protect the
phams.  This is actually a few years old.

Marshall

C Creel wrote:

>  Taken from AABP Newsletter, March 1997, from CVM Update, FDA, Center
> for Veterinary Medicine, Feb. 12, 1997.
>
>  COLLOIDAL SILVER NOT APPROVED FOR TREATING ANIMALS
>
>  FDA has received reports that products containing colloidal silver are
> being
> promoted of use in the treatment of mastitis and other serious disease
> conditions
> of dairy cattle, as well as for various conditions of companion animals.
> For
> example, FDA's Center for Veterinary Medicine has received reports from the
> Agency's regional milk specialists and State Inspectors that colloidal
> silver
> products have been found on some dairy farms.  Also, recent articles in some
> farm newspapers and journals promote the use of colloidal silver in treating
> mastitis and claim that no milk discard is needed.
>  FDA is not aware of any substantial scientific evidence that supports the
> safe
> and effective use of colloidal silver ingredients or silver salts for any
> animal
> disease condition.  Also, in the October 15, 1996 Federal Register, FDA
> proposed
> to establish that all over-the-counter human drug products containing
> colloidal
> silver ingredients or silver salts for internal or external use are not
> generally
> recognized as safe and effective and are misbranded.
>  Use of colloidal silver ingredients in food-producing animals constitutes a
> potentially serous public health concern because of the possibility of
> residues in
> milk or meat.  According to several scientific publications mentioned in the
> October 15, 1996 Federal Register proposal, the human consumption of silver
> may result in argyria -- a permanent ashen-gray or blue discoloration of the
> skin,
> conjunctiva, and internal organs.
>  In addition to the possible human health concerns, use of these products to
> treat a serious illness in animals (including pets) could potentially
> endanger the
> health of the animal by delaying timely, appropriate treatment.
>  Colloidal silver-containing products have not been approved by FDA for use
> in any animal species.  Promoting the use of colloidal silver for treating
> animal
> diseases causes such products to be misbranded veterinary drugs under the
> Federal Food, Drug, and Cosmetic Act (the Act).  Labeling colloidal silver
> products to treat animals causes such products to be new animal drugs which
> are adulterated under the Act.
>  FDA has taken action against colloidal silver products, and is continuing
> to
> investigate the promotion and use of colloidal silver products in dairy and
> other
> animals.  If necessary, FDA will take further appropriate regulatory action.
>
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