Are antibiotics responsible for the mutation of bird flu and mad cow disease?

No. There is no evidence that antibiotics have anything to do with viral mutations, particularly influenza which is known to mutate regularly long before antibiotics were used. Mad cow disease is caused by a prion, and this is too complicated to discuss here. But it is not in any way related to antibiotics.

Related Questions

Mad cow disease and creutzfeldt-jakob disease is there any difference between how you get them?

Cows vs human. Mad cow disease/variant cjd is acquired by eating meat from from affected cows, not a risk in usa. Classical cjd may be acquired from an infected person through blood, or tissue, or, mostly it occurs sporadically due to genetic predisposition. You may consult this site: http://www.Cdc.Gov/ncidod/dvrd/cjd/index.Htm. Read more...

Is armour thyroid a safe medication? Is there any risk of mad cow disease?

Natural thyroid. Strictly speaking, there is no risk of "Mad Cow" disease from Armour thyroid because it is made from porcine (pig) thyroid glands, not cow. There is theoretical risk of porcine prion disease, which has been identified in pigs. However; 1) it has not been shown to spread to humans; 2) Armour uses only food-source pigs, so risk is no greater than that associated with eating pork products. Read more...
Armor Thyroid. Armor Thyroid is a useful alternative to Synthroid and levo-thyroxine in patients who are intolerant to the latter. Since it is made by one company, there is better hopefully quality control that the other 'natural' alternatives out there, so the risks of adverse effects are decreased. Read more...

I've heard that the brain, spinal cord and other central nervous system tissue is where mad cow disease is found. Would steak be ok to eat?

Well... muscles cont. Contain nerves. I would not eat any part of the cow that had mad cow. But... Eating the brain and spinal cord or tail (which contains the spinal cord) would obviously be worse than a slice of steak. Read more...