I was made aware of this on another forum and thought anyone considering micro-chipping might want to read some recent information.
By Jane Williams GFN contributing writer--- (For Publication in the
January 2007 "American Family Voice")
At the National ID Expo in Kansas City, Arkansas Animal Producer's
Association President Michael Steenbergen asked, "What safety studies
have been conducted on the chips that are inserted into animals?" His
question was met with total silence. Did these manufacturers not
know, or were they unwilling to admit that research has confirmed
that implanted microchips cause cancer?
Melvin T. Massey, DVM (Doctor of Veterinary Medicine) from
Brownsboro, Texas, brought this to the attention of the American
Horse Council when he wrote, "I am a retired Equine Veterinarian and
still breed a few horses. Because of migration-infections-increased
risk of sarcoids I will not want to have microchips in my horses."
The Institute of Experimental Pathology at Hannover Medical School in
Germany reported , "An experiment using 4279 CBA/J mice of two
generations was carried out to investigate the influence of parental
preconceptual exposure to X-ray radiation or to chemical carcinogens.
Microchips were implanted subcutaneously in the dorsolateral back for
unique identification of each animal. The animals were kept for
lifespan under standard laboratory conditions. In 36 mice a
circumscribed neoplasm occurred in the area of the implanted
microchip. Macroscopically, firm, pale white nodules up to 25 mm in
diameter with the microchip in its center were found.
Macroscopically, soft tissue tumors such as fibrosarcoma and
malignant fibrous histiocytoma were detected."
Ecole Nationale Veterinaire of Unite d'Anatomie Pathologique in
Nantes, France, reported, "Fifty-two subcutaneous tumors associated
with microchip were collected from three carcinigenicity B6C3F1 mice
studies. Two of these 52 tumors were adenocarcinoma of the mammary
gland located on the dorsal region forming around the chip. All the
other 50 were mesenchymal in origin and were difficult to classify on
morphological grounds with haematoxylin-eosin."
Marta Vascellari of Instituto Zooprofilattico Sperimentale delle
Venezie at Viale dell'Universita in Legnaro, Italy reported examining
a 9-year-old male French Bulldog for a subcutaneous mass located at
the site of a microchip implant. "The mass was confirmed as a high-
grade infiltrative fibrosarcoma, with multifocal necrosis and
peripheral lymphoid aggregates."
The Toxicology Department of Bayer Corporation in Stillwell, Kansas
reported, "Tumors surrounding implanted microchip animal
identification devices were noted in two separate chronic
toxicity/oncogenicity studies using F344 rats. The tumors occurred at
a low incidence rate (approximately 1%), but did result in the early
sacrifice of most affected animals, due to tumor size and occasional
metastases. No sex-related trends were noted.
All tumors occurred during the second year of the studies, were
located in the subcutaneous dorsal thoracic area (the site of
microchip implantation) and contained embedded microchip devices. All
were mesenchymal in origin and consisted of the following types,
listed on order of frequency: malignant schwannoma, fibrosarcoma,
anaplastic sarcoma, and histiocytic sarcoma.
The following diagnostic techniques were employed: light microscopy,
scanning electron microscopy, and immunohistochemistry. The mechanism
of carcinogenicity appeared to be that of foreign body induced
tumorigenesis."
Additional studies related to cancer tumors at the site of microchip
implants have been conduced in China; however, at this time these
studies are not available in English. At this time, no long term
studies are available covering more than two years. It only seems
logical to conclude that if carcinogenic tumors occur within one
percent of animals implanted within two years of the implant that the
percentage would increase with the passage of time. Additional
studies need to be conducted, but don't hold your breath for the
manufacturers of microchips to conduct such research and be leery of
any such "research" they may conduct. Even the limited research
available clearly indicates that implantation of microchips within an
animal is gambling with the animal's well being.
For additional Information:
http://www.vetpathology.org/cgi/cont...tract/43/4/545, National Library
of Medicine and National Institutes of Health,
www.pubmed.gov, google
for "sarcomas associated with implanted microchips".
_________________
Cher