What We Eat and Genetic Tamperings

These bulls on a farm in South Dakota were genetically engineered to be prion-free, which can make them resistant to mad cow disease.

It is known that genetic information can be passed from one species, be  it virus, plant, bacteria or a plethora of other possibilities to human.
Quotes on Genetic engineering and our foods...
From Wikipedia:
Genetically modified animals currently being developed can be placed into six different broad classes based on the intended purpose of the genetic modification: (1) to enhance production or food quality traits (faster growing fish, pigs that expel less toxins); (2) to improve animal health (disease resistance); (3) to produce products intended for human theraputic use (pharmacutical products or tissue for implantation); (4) to enrich or enhance the animals' interactions with humans (hypo-allergenic pets); (5) to develop animal models for human diseases (pigs as models for cardiovascular disease); (6) and to produce industrial or consumer products (fibres for multiple uses).^[31](The last may be of concern to Morgellons sufferers)
Cows with human genes: In 2011, Chinese scientist have been breeding cows genetically engineered with genes for human beings to produce milk that would be the same as human breast milk.[33] This would possible be beneficial for the mothers who cannot produce breast milk but want their children to receive the benefits from breast milk rather than formula.
Goats that produce silk in their milk: A company called biosteel has genetically engineered goats to produce milk with strong spider web like silk proteins in their milk.[34] This product is not used for consumption, but to make bulletproof vest and anti-ballistic missile systems for military contracts instead.[34]

From USA Today
Genetically engineered meat may be served under FDA planNews
By Elizabeth Weise (2008)
After more than seven years of discussion, the Food and Drug Administration proposed regulations Thursday that would allow the commercial use of genetically engineered animals.
Such animals are genetically altered — either their genes are changed or genes from another animal are added — for a specific purpose. The FDA states that such animals either produce drugs; serve as models for human disease; produce industrial or consumer products, such as fiber; or have improved food-use qualities, such as being more nutritious.