Scientists say new study shows pig health hurt by GMO feed

Scientists say new study shows pig  health hurt by GMO feed

Published June 12, 2013


  • Pigs in Pen_Reuters_Jan 31 2013.jpg

Pigs fed a diet of only genetically modified grain showed markedly higher  stomach inflammation than pigs who dined on conventional feed, according to a  new study by a team of Australian scientists and U.S. researchers.

The study adds to an intensifying public debate over the impact of  genetically modified crops, which are widely used by U.S. and Latin American  farmers and in many other countries around the world.

The study was published in the June issue of the peer-reviewed Journal of  Organic Systems by researchers from Australia who worked with two  veterinarians and a farmer in Iowa to study the U.S. pigs.

Lead researcher Judy Carman is an epidemiologist and biochemist and director  of the Institute of Health and Environmental Research in Adelaide,  Australia.

The study was conducted over 22.7 weeks using 168 newly weaned pigs in a  commercial U.S. piggery.

One group of 84 ate a diet that incorporated genetically modified (GM) soy  and corn, and the other group of 84 pigs ate an equivalent non-GM diet. The corn  and soy feed was obtained from commercial suppliers, the study said, and the  pigs were reared under identical housing and feeding conditions. The pigs were  then slaughtered roughly five months later and autopsied by veterinarians who  were not informed which pigs were fed on the GM diet and which were from the  control group.

Researchers said there were no differences seen between pigs fed the GM and  non-GM diets for feed intake, weight gain, mortality, and routine blood  biochemistry measurements.

But those pigs that ate the GM diet had a higher rate of severe stomach  inflammation – 32 percent of GM-fed pigs compared to 12 percent of non-GM-fed  pigs. The inflammation was worse in GM-fed males compared to non-GM fed males by  a factor of 4.0, and GM-fed females compared to non-GM-fed females by a factor  of 2.2. As well, GM-fed pigs had uteri that were 25 percent heavier than non-GM  fed pigs, the study said.

The researchers said more long-term animal feeding studies need to be  done.

Biotech seeds are genetically altered to grow into plants that tolerate  treatments of herbicide and resist pests, making producing crops easier for  farmers. Some critics have argued for years that the DNA changes made to the  transgenic plants engineer novel proteins that can be causing the digestive  problems in animals and possibly in humans.

The companies that develop these transgenic crops, using DNA from other  bacteria and other species, assert they are more than proven safe over their use  since 1996.

CropLife International, a global federation representing the plant science  industry, said more than 150 scientific studies have been done on animals fed  biotech crops and to date, there is no scientific evidence of any detrimental  impact.

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Published in: on June 12, 2013 at 9:19 pm  Leave a Comment  

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