Since March 4th, workers have fished 3,300 5,916 6,601 13,000 (03/18/13) dead, bloated pigs out of a river in Shanghai. Last week there was little information about where they were coming from, how they got there, or what they died from, only general agreement, as Bloomberg put it, that "nothing good comes from a dead-pig tide".
The Huangpu River feeds the drinking water supply for some of the city and although officials have so far assured citizens that the water is safe, and that they're taking water samples regularly, doubts persist.
If Pigs Could Fly
How the pigs got there is still a bit of a mystery. The carcasses are ear-tagged but officials can't decipher the tags, so they don't know the exact situation. Most likely, farmers dumped diseased pigs (some are infected with porcine circovirus) into the river at some upstream province. Despite the gruesome pig panorama, citizens are told not to fear the safety of pigs originating from the suspect provinces.
Piglets
via Wikicommons.
China produces half the world's pigs, five times what the U.S. produces. Pork is so central to the economy that pig price fluctuations effect the cost of living. This means that the large scale pig deaths over the past several months, albeit only tens of thousands in a pig population of millions, concern not only water drinkers and pork consumers but economists too.
When other food products befall catastrophe, the story may be different. When frosts freeze orange groves in Florida, for instance, producers warn consumers in the Northeast U.S. that orange juice prices might go up, that's it. Pig parts, however, are found in hundreds of products besides rinds and bellies and chops and loins. For instance, eighty percent of the U.S. heparin supply comes from pigs raised on farms in China, according to the director of Pharmacy at Boston Children's Hospital.
A few years ago, an epidemic of blue ear pig disease (porcine reproductive and respiratory syndrome virus (PRRSV)) ended up killing so many pigs that producers met the demand for heparin by adulterating the drug with a chemically similar substance. As the crisis unfolded, analysis detected oversulfated chondroitin sulfate that caused hundreds of severe allergic reactions and 175 deaths worldwide.
In the aftermath, journalists investigated the supply chain and found that the FDA had alarmingly little oversight into the production practices on pig farms in China. Since then, the FDA has increased its oversight. However, even last year, the Wall Street Journal reported that the FDA found contaminated heparin from fourteen more Chinese suppliers. The FDA put them on a watchlist with eight others.
They'd Fly Away?
In light of these investigations, consider that pigs provide material for many human life-saving technologies. A recent study describes the possibility of using porcine small intestine patches for pediatric patient cardiovascular reconstruction. Scientists are experimenting with porcine (and bovine) matrices for things like abdominal wall reconstruction.
Although some medicines, like insulin, are no longer made from pigs, the widespread use of pig parts in medicine often goes unacknowledged. Some religions forbid the use of pigs even for medical treatment, and some people get squeamish about pig body parts, according to designer Christien Meinderstsma in this Ted Talk. One Dutch heart valve company wouldn't send her their valve because they didn't want people associating their life-saving technology with pigs.
In her talk on the book, "Pig 05049", Meinderstsma highlights 185 products made with a pig she followed. A Greek cigarette uses pig parts to make a more "healthy", lung-like filter. Some frozen beef steak is made with beef bits glued together with pig fibrinogen or "meat glue". Some collagen injections for facial rejuvenation come from pigs. Pigs are also used to make soap, train brakes, fine bone china, and bullets (not silver, according to the picture...), and more than one hundred other things. They're amazingly ubiquitous, pigs, and floating in China's rivers too.
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Some related posts include Avian Flu In China (2005); Streptococcus suis in China (2005); a note on the heparin adulteration (2008) the H1N1 pandemic - (2009), and here.
