Jan 9 California and Wyoming are the latest U.S.
states to report confirmed cases of a deadly pig virus, bringing
the number of states affected to 22, the U.S. Department of
Agriculture said on Thursday.
Porcine Epidemic Diarrhea virus (PEDv), which causes
diarrhea, vomiting and severe dehydration in hogs, has spread
quickly across the U.S. hog belt since its discovery in the
United States in April 2013.
PEDv is not harmful to humans and is not transmissible
through pork. It has occurred in Europe and Asia but this is the
first year that it has been seen in the United States.
"An outbreak in a sow farm can destroy four to six weeks of
pigs before the animals develop an immune response," said Rodney
Baker, a swine veterinarian at Iowa State University. "Producers
can easily lose at least a 12th of their annual revenue," he
The number of new cases increased by 134 for the week of
Dec. 29, bringing total reported cases to 2,084, according to
the USDA's National Animal Health Laboratory Network (NAHLN).
As defined by the USDA, each diagnostic case could represent
multiple animals at either a single farm site or several
locations. The USDA's NAHLN released its latest PEDv data on
As of Dec. 1, 2013 California and Wyoming ranked 28 and 29
in terms of total hog inventory with 95,000 head and 90,000 head
respectively, according to USDA data.
The virus, which is transmitted orally and through pig
feces, has left the U.S. hog industry scrambling to curb its
spread and has fueled concerns U.S. hog supplies will slump in
the spring and summer.
There are no official figures for pigs lost to the disease
but U.S. hog industry analysts estimate one million to four
million have died.
(Reporting by Meredith Davis; Editing by James Dalgleish)