With New World Screwworm becoming a concern with Mexico and South American cattle producers, U.S. producers should vigilantly monitor their herds. Untreated infestation can result in livestock death due to secondary infection.

Chief Veterinarian for the National Cattlemen’s Beef Association, Dr. Kathy Simmons, says New World Screwworm can be difficult to spot in the first 1 to 2 days. Infested animals will show signs of discomfort and decreased appetite. They will isolate from the herd. There will usually be a draining wound accompanied by the smell of decaying body tissue. Check for visible signs of maggots.

While the disease has not yet been identified in the U.S., Simmons urges producers to carefully monitor their herds.

Read tips on identifying New World Screwworm infestation in cattle here.