Tags: Flu | Strain | Pork | Alert

New Flu Strain Puts Pork Industry on Alert After 2009 Pandemic

Wednesday, 04 Jan 2012 10:25 AM

 

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A new flu virus thought to have originated in pigs has agricultural producers on alert two years after a swine flu pandemic caused sales to drop and disrupted U.S. pork exports.

Twelve people in five states have been infected, with three hospitalized, according to the Centers for Disease Control and Prevention in Atlanta. At least six reported no recent exposure to pigs, suggesting “limited human-to-human transmission,” according to the report. Eleven of those stricken were children.

The virus may not become as prevalent as the 2009 variant, known as H1N1, which led to as many as 89 million cases and 18,300 deaths in the U.S. in the first flu pandemic in more than 40 years, according to the CDC. Still, livestock producers are concerned that consumers may fear they can get a potentially lethal disease from eating pork. Flu is transmitted through droplets of infected body fluids when people cough, sneeze or talk.

“It’s always something that we need to keep an eye on, that it doesn’t get more severe or spread more quickly,” Liz Wagstrom, chief veterinarian with the National Pork Producers Council, which has offices in Des Moines, Iowa, and Washington. “It’s very important the public understand you can’t get flu from eating pork.”

Import Ban

During the H1N1 pandemic, China and Russia closed their markets to U.S. pork and industry revenue was estimated to have fallen by nearly $2.2 billion in the last eight months of 2009, according to the council. The H1N1 strain contained genetic material from five different flu viruses, including North American swine and bird flu and two swine flu viruses found in Europe and Asia.

The Des Moines, Iowa-based National Pork Board, which conducts research on pork and promotes the food, has sent out alerts, said Wagstrom. Veterinary labs that test samples from sick pigs are on the lookout for the strain, she said.

U.S. agencies are not referring to the new strain as swine flu, mindful of the popular description of H1N1 that upset markets and producers. Such illnesses contain a genetic mix of viruses seen in pigs, birds and people and get the moniker because the overall structure is the type that affects pigs.

“We are aware of the pork industry’s concerns,” said Jeff Dimond, an agency spokesman, in an interview. CDC has “gone overboard” not to use the description, he said.

Genetic Similarity

The new virus, called H3N2v, contains a gene from the 2009 variant, according to the CDC. The agency is “taking this situation very seriously” and has increased surveillance in areas where cases occurred, according to a Dec. 9 CDC report. As a precaution, a candidate vaccine has been developed and provided to manufacturers so they can begin production if necessary, according to the report.

The strain has been detected in Indiana, Iowa, Maine, Pennsylvania and West Virginia, according to the Atlanta-based health agency.

Despite the added surveillance, government scientists haven’t made conclusions about the durability of the new strain.

All the people sickened have recovered and no continuing transmission has been detected, according to the CDC. Human immunity may be a concern because it’s a new virus.

‘Could Get Legs’

“This particular strain could get legs, so to speak, or just die out,” Dimond said.

The strain isn’t too worrisome because it doesn’t seem to be spreading quickly, said Peter Katona, associate clinical professor of infectious diseases at the University California, Los Angeles, in an interview.

The reported cases have prompted “concern, but I wouldn’t say it’s super high,” John Treanor, chief of the infectious disease division at the University of Rochester Medical Center in New York, said in an interview.

It’s important to track such viruses so the U.S. can respond if they begin spreading rapidly and become more virulent, he said.

“Will the viruses be able to emerge from pigs into humans and cause another pandemic in humans?” said Treanor. “That’s why we keep track of what kinds of viruses are emerging.”

© Copyright 2014 Bloomberg News. All rights reserved.

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