By Lissette Talledo
The U.S. Department of Agriculture have quarantined two farms as they continue to investigate mad cow disease. Last month the USDA discovered mad cow disease at a California dairy farm.
Last week, the USDA documented the fourth confirmed case of mad cow disease in California. Mad cow disease is a brain wasting disease which affects cattle.
USDA officials said the cow was not a threat since it wasn’t set out for human consumption.
The farm where the cow was discovered is being quarantined as well as another farm which is closely related to the first one.
They are investigating to see if there are more diseased cows in either of the two farms.