"Experts [from USDA] said the case was "atypical" - meaning it was a rare occurrence in which a cow contracts the disease spontaneously, rather than through the feed supply."So, it was a case of spontaneous generation.
- Mad Cow Disease Found In California; No Human Threat Seen, Reuters, 25 April 2012
Why then is CNN reporting this morning:
"Two farms have been quarantined by the U.S. Department of Agriculture as the agency continues to investigate last month's discovery of mad cow disease at a California dairy farm. ... Determining if the cow became sick from feed is an area where investigators are focusing close attention."The cow did not become sick from feed. It couldn't because feed does not contain animal parts. This was a rare case of spontaneous generation.
- USDA Quarantines 2 Farms In Mad Cow Investigation, CNN, 3 May 2012