News / Health

Deadly Pig Virus Re-Infects US Farm, Fuels Supply Fears

FILE - A group of young pigs stare out of a pen at a hog farm in central North Dakota, in this Jan. 2005 file photo.
FILE - A group of young pigs stare out of a pen at a hog farm in central North Dakota, in this Jan. 2005 file photo.
Reuters
An Indiana farm has become the first to confirm publicly it suffered a second outbreak of a deadly pig virus, fueling concerns that a disease that has wiped out 10 percent of the U.S. hog population will be harder to contain than producers and veterinarians expected.
 
The farm, through its veterinarian, publicly acknowledged on Tuesday a repeat incident of Porcine Epidemic Diarrhea virus (PEDv), which has killed up to 7 million pigs and pushed pork prices to record highs since it was first identified in the United States a year ago.
 
Matt Ackerman, whose veterinary practice is in southeastern Indiana, told Reuters the farm's operators did not want to be identified but authorized him to speak on their behalf.
 
The state and federal effort to stamp out PEDv has operated on an assumption that a pig, once infected, develops immunity and will not be afflicted by the disease again for at least several years. Likewise, farms that had endured the disease were not known to suffer secondary outbreaks.
 
But a year after the virus was identified, repeat outbreaks have occurred at farms but not been publicly confirmed before now. These so-called secondary outbreaks are a challenge to efforts to stem the disease, which is almost always fatal to baby piglets.
 
Nationwide, PEDv outbreaks seem to recur in about 30 percent of infected farms, the American Association of Swine Veterinarians told Reuters, confirming for the first time the likelihood of repeated outbreaks.
 
Hog futures reached a record high last month and are up more than 26 percent at $115 per hundredweight since the first U.S. outbreak was confirmed last summer. Retail pork prices also have set new records, and a wave of re-infection could cause even more losses to the nation's hog herd.
 
In the Indiana case, genetic sequencing showed the “exact same strain” of PEDv hit pigs at the Indiana farm in May 2013 and again in March 2014, said Ackerman, who collected samples from the farm.
 
Piglets born to sows that were infected for a second time have a death rate of about 30 percent, compared to near-total death loss among newborn piglets during the first outbreak, he said.
 
The incidence of the disease “re-breaking” on farms after it appeared to have been wiped out, indicates that the risk for ongoing severe losses from the virus is bigger than previously expected. The lack of long-term immunity also means hog producers must keep up strict bio-security measures to fight the disease, which has already spread to 30 states.
 
Reasons for re-infection unclear
 
Veterinarians and others have been unable to predict the duration of immunity to PEDv in hogs following exposure, in part because the disease had never been in the United States before last year.
 
Ackerman had thought hogs would have a natural immunity to PEDv for three years after being infected because that is the case for a similar disease called Transmissible Gastroenteritis.
 
“Just because a farm broke with PEDv last year doesn't mean that they are protected from re-breaking with it this year,” he said in a telephone interview.
 
Ackerman said he did not know why the female pigs, or sows, on the Indiana farm were re-infected after being exposed to the virus during the original outbreak last year. At the time, they were about six months to a year old. The sows are having piglets and passing limited immunity on to their offspring, he said.
 
The farm “does an excellent job of sanitation,” he said. “That's why it's so hard to figure out why they're struggling with it.”
 
The repeat case of PEDv in Indiana puts to rest gossip about a re-break in the state that has passed from one Midwest farmer to another for weeks. Producers are on edge because no vaccine has yet been able to completely protect pigs from the disease.
 
PEDv is transmitted from pig to pig by contact with pig manure, which contains the virus. It can be transmitted from farm to farm on trucks, and many veterinarians also believe it is spreading through animal feed.
 
Harry Snelson, a veterinarian who represents the American Association of Swine Veterinarians, said repeat occurrences  tend not to be as severe as the first outbreak, although farms are still losing pigs.
 
One potential reason for repeat outbreaks is that high levels of the virus, found in fecal material, overwhelm hogs' natural immunity, Snelson said.
 
“It probably doesn't take a whole lot to override the level of immunity that we're getting,” he said. “Obviously immunity is a key part of our being able to control the spread of the virus.”
 
Preliminary results from studies on immunity, directed by the National Pork Board, confirm “immunity does appear not to be very long lived,” said Lisa Becton, director of swine health information for the board. The board has collected more than $2 million for research on PEDv.
 
The re-breaking is causing concern among farmers and meat packers across the country, as the PEDv outbreak continues to spread with no definitive solution in sight.
 
“If you have that disease, it causes a huge death loss, and then you get it again,” said Josh Trenary, executive director of Indiana Pork. “It's pretty clear why it would be concerning.”

You May Like

Lesotho Faces New Round of Violence, Political Crisis

Brutal killing of military officer has sent former leaders back into S. Africa where they're watching anxiously as regional officials head in to try to restore peace More

Video US Diplomat Expects Adoption of Bosnian Massacre Anniversary Resolution

Samantha Power says there's broad consensus about killings in Bosnia's war, but Russia calls resolution 'divisive,' backs UN countermeasure More

UN Report Exposes Widespread Boko Haram Atrocities

Damning report graphically details pattern of vicious, widespread atrocities committed by Islamist militants More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Olympics Construction Scars Sacred Korean Mountaini
X
July 02, 2015 4:10 AM
Environmentalists in South Korea are protesting a Winter Olympics construction project to build a ski slope through a 500-year-old protected forest. Brian Padden reports that although there is strong national support for hosting the 2018 Pyeongchang Winter Olympics, there are growing public concerns over the costs and possible ecological damage at the revered mountain.
Video

Video Olympics Construction Scars Sacred Korean Mountain

Environmentalists in South Korea are protesting a Winter Olympics construction project to build a ski slope through a 500-year-old protected forest. Brian Padden reports that although there is strong national support for hosting the 2018 Pyeongchang Winter Olympics, there are growing public concerns over the costs and possible ecological damage at the revered mountain.
Video

Video Xenophobia Victims in South Africa Flee Violence, Then Return

Many Malawians fled South Africa early this year after xenophobic attacks on African immigrants. But many quickly found life was no better at home and have returned to South Africa – often illegally and without jobs, and facing the tough task of having to start over. Lameck Masina and Anita Powell file from Johannesburg.
Video

Video Family of American Marine Calls for Release From Iranian Prison

As the crowd of journalists covering the Iran talks swells, so too do the opportunities for media coverage.  Hoping to catch the attention of high-level diplomats, the family of American-Iranian marine Amir Hekmati is in Vienna, pleading for his release from an Iranian prison after nearly 4 years.  VOA’s Heather Murdock reports from Vienna.
Video

Video UK Holds Terror Drill as MPs Mull Tunisia Response

After pledging a tough response to last Friday’s terror attack in Tunisia, which came just days before the 10th anniversary of the bomb attacks on London’s transport network, British security services are shifting their focus to overseas counter-terror operations. VOA's Henry Ridgwell has more.
Video

Video Obama on Cuba: This is What Change Looks Like

President Barack Obama says the United States will soon reopen its embassy in Cuba for the first time since 1961, ending a half-century of isolation. VOA White House correspondent Luis Ramirez reports.
Video

Video Hate Groups Spread Influence Via Internet

Hate groups of various kinds are using the Internet for propaganda and recruitment, and a Jewish human rights organization that monitors these groups, the Simon Wiesenthal Center, says their influence is growing. The messages are different, but the calls to hatred or violence are similar. VOA's Mike O’Sullivan reports.
Video

Video US Silica Sand Mining Surge Worries Illinois Residents, Businesses

Increased domestic U.S. oil and gas production, thanks to advances known as “fracking,” has created a boom for other industries supporting that extraction. Demand for silica sand, used in fracking, could triple over the next five years. In the Midwest state of Illinois, people living near the mines are worried about how increased silica sand mining will affect their businesses and their health. VOA’s Kane Farabaugh has more in this first of a series of reports.
Video

Video Blind Somali Journalist Defies Odds in Mogadishu

Despite improving security in the last few years, Somalia remains one of the most dangerous countries to be a journalist – even more so for someone who cannot see. Abdulaziz Billow has the story of journalist Abdifatah Hassan Kalgacal, who has been reporting from the Somali capital for the last decade despite being blind.
Video

Video Texas Defies Same-Sex Marriage Ruling

Texas state officials have criticized the US Supreme Court decision giving same-sex couples the right to marry nationwide. The attorney general of Texas says last week's decision did not overrule constitutional "rights of religious liberty," and therefore officials performing wedding services can refuse to perform them for same-sex couples if it is against their religious beliefs. Zlatica Hoke reports on the controversy.
Video

Video Rabbi Hits Road to Heal Jewish-Muslim Relations in France

France is on high alert after last week's terrorist attack near the city Lyon, just six months after deadly Paris shootings. The attack have added new tensions to relations between French Jews and Muslims. France’s Jewish and Muslim communities also share a common heritage, though, and as far as one French rabbi is concerned, they are destined to be friends. From the Paris suburb of La Courneuve, Lisa Bryant reports about Rabbi Michel Serfaty and his friendship bus.
Video

Video Saudi Leaks Expose ‘Checkbook Diplomacy’ In Battle With Iran

Saudi Arabia’s willingness to wield its oil money on the global diplomatic stage appears to have been laid bare, after the website WikiLeaks published tens of thousands of leaked cables from Riyadh’s Ministry of Foreign Affairs. VOA's Henry Ridgwell reports.
Video

Video In Kenya, Police Said to Shoot First, Ask Questions Later

An organization that documents torture and extrajudicial killings says Kenyan police were responsible for 1,252 shooting deaths in five cities, including Nairobi, between 2009 and 2014, representing 67 percent of all gun deaths in the areas reviewed. Gabe Joselow has more from Nairobi.

VOA Blogs