Porcine Epidemic Diarrhea Virus Migrates To U.S., Threatens Pork Prices

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The Living Force
FOTCM Member
Again, the bells are ringing for pork prices like months ago...

_http://www.huffingtonpost.com/2013/07/10/porcine-epidemic-diarrhea-virus-pork-prices_n_3575321.html

DENVER -- Pork prices may be on the rise in the next few months because of a new virus that has migrated to the U.S, killing piglets in 15 states at an alarming rate in facilities where it has been reported.

Dr. Nick Striegel (STREE'-gel), assistant state veterinarian for the Colorado Department of Agriculture, said Wednesday the Porcine Epidemic Diarrhea Virus, also known as PED, was thought to exist only in Europe and China, but Colorado and 14 other states began reporting the virus in April, and officials confirmed its presence in May. The virus causes severe diarrhea, vomiting and severe dehydration in pigs, and can be fatal.

"It has been devastating for those producers where it has been diagnosed. It affects nursing pigs, and in some places, there has been 100 percent mortality," he said.

Striegel said the disease is not harmful to humans, and there is no evidence it affects pork products.

He said outbreaks are not required to be reported to federal officials, so the extent of the spread is difficult to determine, but in Colorado at least two large production facilities have seen outbreaks.

The virus has been confirmed in about 200 hog facilities in 14 other states including Arkansas, Iowa, Illinois, Indiana, Kansas, Michigan, Minnesota, Missouri, North Carolina, New York, Ohio, Oklahoma, Pennsylvania, and South Dakota, according to the American Association of Swine Veterinarians.

Dr. Lisa Becton, director of swine health information and research for the National Pork Board, an industry trade group, said the impact on the availability of pork and meat prices is difficult to estimate.

"At this point, I really don't have any indications what that potential impact would be. Obviously, we know for individual farms the impact is severe, especially if it's a sow farm that has baby pigs, because baby pigs do suffer the most from the disease," she said.

According to the Iowa Pork Industry Center, an industry advocate, the ability to test for the disease is limited. It is believed to be transmitted by infected food or feces, and can be contained by quarantining infected animals and washing down trucks and production facilities.

Becton said the disease can spread quickly and has killed entire populations of pigs under 7 days old.

"As they get older, by the time they're weaned at around 3 weeks of age, death loss can be around 80 percent or in severe cases upwards of 100 percent. Typically, after weaning mortality declines dramatically," she said.

She said veterinarians are still not sure how the disease got to the U.S.

Phil Lukens, co-owner of Lukens Farms located about 100 miles north of Denver where about 20 pigs a year are raised for market, said he has not been warned about the new disease, but he said most farmers already take stringent precautions to protect their pigs.

"There are so many viruses, you always assume the worst. We keep our place clean, and we quarantine new animals for 30 days," Lukens said.
 
"Not dangerous to humans." How long before it mutates?
 
Laura said:
"Not dangerous to humans." How long before it mutates?

Indeed. Pigs can be "mixing vessels" for viruses and prime them for transfer to humans.

The transmission of influenza viruses from swine to humans is not a rare event. An H3N2 swine influenza virus containing the TRIG cassette was isolated from a 7-month-old boy in Canada (Robinson et al, 2007). As the infant had no history of contact with farm animals, the virus is believed to have transmitted from human-to-human. In another zoonotic transmission event, an H1N1 swine influenza virus, also carrying the TRIG cassette, was found to be responsible for acute respiratory illnesses in healthy pigs and humans at a 2007 Ohio county fair (Swenson et al, 2008). H1N1 viruses isolated from the sick individuals were genetically 100% identical to those harbored by the pigs, indicating that the virus was passed between pigs and humans at the fair. In an experimental swine infection model, the Ohio H1N1 swine influenza virus was shed at high titers and caused severe clinical disease in pigs (Vincent et al, 2008). Subsequently to this case, almost identical H1N1 swine influenza viruses were isolated from swine in several states, showing the ability of the virus to spread easily within susceptible pigs. Case reports indicate at least a 10% mortality rate with these novel Ohio-like H1N1 in finishing pigs (S Henry, personal communication), but figures for related human illnesses are unknown.

There is no direct evidence that reassortment events leading to previous pandemic viruses (such as those of the 1918, 1957 or 1968 pandemics) occurred in pigs. However, reassortment of avian, human and swine viruses in the pig and subsequent molecular adaptation of the reassortant swine influenza viruses have been described. These could result in infection of humans with swine-derived reassortant viruses harboring the ability to cause human-to-human transmission.
_https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2702078/
 
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