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Discussion on Effect of microchip implantation
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Member:
canderso
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Posted on Tuesday, Oct 23, 2012 - 8:01 am:
Dr O,
I have recently had someone state they won't microchip their animals because "microchips cause cancer".
I was surprised at this statement, mostly because were this the case, I would expect something to be noticed in Europe where tens of thousands of horses have been microchipped since 2005.
I have done a search of pubmed and Ivis and found nothing to support this statement, (although I did find warnings about being sure to follow implantation protocols for cats).
Have you seen any research on adverse effects/cancer resulting from microchipping horses?
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Member:
savage
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Posted on Tuesday, Oct 23, 2012 - 7:39 pm:
CherylA, I sure hope not because the The United States Equestrian Federation is requiring it for all newly registered horses with the FEI
https://www.thehorse.com/ViewArticle.aspx?ID=20806
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Member:
canderso
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Posted on Tuesday, Oct 23, 2012 - 9:46 pm:
Hi Linda,
I have been through the research databases I can find and can't find anything to substantiate such a statement. But it is possible I am not searching correctly so I am interested to hear what Dr O. has to say.
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Member:
canderso
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Posted on Tuesday, Oct 23, 2012 - 9:57 pm:
Here are articles I found:
Vet Pathol. 2006 Jul;43(4):545-8.
Fibrosarcoma with typical features of postinjection sarcoma at site of microchip implant in a dog: histologic and immunohistochemical study.
Vascellari M, Melchiotti E, Mutinelli F.
Vet Pathol. 2011 Jul;48(4):896-902. Epub 2010 Aug 19.
Neoplasia and granulomas surrounding microchip transponders in Damaraland mole rats (Cryptomys damarensis).
Sura R, French RA, Goldman BD, Schwartz DR.
Toxicol Pathol. 1999 Sep-Oct;27(5):519-27.
Transponder-induced sarcoma in the heterozygous p53+/- mouse.
Blanchard KT, Barthel C, French JE, Holden HE, Moretz R, Pack FD, Tennant RW, Stoll RE.
Vet Dermatol. 2011 Dec;22(6):565-9. doi: 10.1111/j.1365-3164.2011.00975.x. Epub 2011 May 2.
Microchip-associated fibrosarcoma in a cat.
Carminato A, Vascellari M, Marchioro W, Melchiotti E, Mutinelli F.
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Moderator:
DrO
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Posted on Wednesday, Oct 24, 2012 - 9:22 pm:
Hi Cheryl,
We have microchiped hundreds of animals and not had a single problem. I have not seen any such research to suggest cancer is a complication.
DrO
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Member:
canderso
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Posted on Wednesday, Oct 24, 2012 - 11:11 pm:
Dr O - That is the conclusion that I have drawn as well... but I wanted to check with an independent party to confirm!
I have since found research that specifically has looked for adverse effects related to microchipping in various species with large N, and nothing has been found.
There are, however, some papers of the "ooooh! lookie this!" type: single instances where fibrosarcomas have formed around a microchip. One in a rat, one in a kind of vole, one in a dog, one in a cat.
Once again, thank-you.
Cheryl
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