(NAFB.com) – Another case of New World screwworm was found in a Mexican cow south of the border. Despite that, USDA says it won’t limit cattle imports from Mexico. Reuters says U.S. cattle supplies in recent months grew tight after Washington blocked Mexican livestock shipments into the U.S. in late November due to the screwworm. The World Organization for Animal Health says the disease was found in a cow located in the Mexican state of Tabasco. The pest can infect wildlife, cattle, and in rare cases, people. Maggots from the screwworm flies burrow into the skin of living animals, causing serious and often fatal damage. USDA says the comprehensive pre-clearance inspection and treatment protocol will help cattle and bison move safely from Mexico into the United States. America’s cattle supplies are at their lowest levels in more than 70 years, and beef prices are high because ranchers slashed production due to drought.