No.

The laymens version of the Mad Cow issue:

Proteins, in their normal course, "fold". When they fold wrong, they cause nearby proteins to also fold wrong, and the protein (in this case the brain) tends to form in bunches. This goes on long enough, you brain will begin to show these clusters, leaving empty space and resulting in (eventually) fatal neurological effects.

Skip ahead to the cows. Cows used to be slaughtered and the good bits sold. What couldn't be sold was put through a process called "rendering", which basically means incinerated until the remains (brain & bone, usually) become a fine "nutritious and protein rich" powder. They would then feed all this cannibalistic protein back to cows to make them fatter and more muscular. So what do you think happens when you render a cow that has BSE? Affected protein (called prions) get passed back into the food supply which humans eventually eat. Prions, like regular protein, survive the cooking process intact. After a very long gestation period, symptoms begin to manifest, and a CAT scan reveals your brain resembles a nicely aged swiss cheese.

Once discovered, governments in Europe and the Americas began to ban the rendering process (cows are no longer fed to cows). One might suppose that these new genetically engineered cows might be the entryway to reinstate the rendering process (a financial boon to the slaughter industry). I for one, will not buy meat I suspect coming from a ranch that supports this practice.