Washington. Vomitoxin makes nasty appearance for U.S. farm sector . A fungus that causes “vomitoxin” has been found in some U.S. corn harvested last year, forcing poultry and pork farmers to test their grain, and giving headaches to grain growers already wrestling with massive supplies and low prices.
The plant toxin sickens livestock and can also make humans and pets fall ill.
The appearance of vomitoxin and other toxins produced by fungi is affecting ethanol markets and prompting grain processors to seek alternative sources of feed supplies.
Researchers at the U.S. Department of Agriculture first isolated the toxin in 1973 after an unusually wet winter in the Midwest. The compound was given what researchers described as the “trivial name” vomitoxin because pigs were refusing to eat the infected corn or vomiting after consuming it. The U.S. Corn Belt had earlier outbreaks of infection from the toxin in 1966 and 1928.
A vessel carrying a shipment of corn from Paraguay is due next month at a North Carolina port used by Smithfield Foods Inc [SFII.UL], the world’s largest pork producer.
The spread of vomitoxin is concentrated in Indiana, Wisconsin, Ohio, and parts of Iowa and Michigan, and its full impact is not yet known, according to state officials and data gathered by food testing firm Neogen Corp.
In Indiana, 40 of 92 counties had at least one load of corn harvested last fall that has tested positive for vomitoxin, according to the Office of Indiana State Chemist’s county survey. In 2015 and 2014, no more than four counties saw grain affected by the fungus.
And in a “considerable” share of corn crops tested in Michigan, Wisconsin and Indiana since last fall’s harvest, the vomitoxin levels have tested high enough to be considered too toxic for humans, pets, hogs, chickens and dairy cattle, according to public and private data compiled by Neogen. The company did not state what percent of each state’s corn crop was tested.
Smithfield would not confirm it had ordered the corn from Paraguay, but two independent grain trading sources said Smithfield was the likely buyer. A company source said corn Smithfield has brought in from Indiana and Ohio, to feed pigs in North Carolina, has been “horrible quality” due to the presence of mycotoxins.
The U.S. Food and Drug Administration allows vomitoxin levels of up to 1 part per million (ppm) in human and pet foods and recommends levels under 5 ppm in grain for hogs, 10 ppm for chickens and dairy cattle. Beef cattle can withstand toxin levels up to 30 ppm.