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After new case of deadly parasite, the USDA says it won't shut U.S.-Mexico border to cattle again

Jake Maxwell, on horseback, corrals cattle into metal gates that his mother helped put together as the sun sets in Shiprock, New Mexico.
Gabriel Pietrorazio/KJZZ
Jake Maxwell, on horseback, corrals cattle into metal gates that his mother helped put together as the sun sets in Shiprock, New Mexico.

A new case of a parasite that shut the Southwest border down for cattle imports for more than two months has been reported in Mexico.

The U.S.-Mexico border earlier this month reopened to cattle after the detection of a New World Screwworm case in southern Mexico late last year. The parasite is a fly larva that burrows into the flesh of warmblooded animals and can often be deadly.

Now, a new case of the parasite has been reported, again in southern Mexico. This time, the U.S. Department of Agriculture will leave the border open, after establishing heightened inspection protocols for cattle crossing on foot during the period when the border was closed during December and January.

The USDA says it will monitor the situation and take action again “if the need arises.”

The United States eradicated the New World Screwworm in 1966.

More news from KJZZ's Hermosillo Bureau

Nina Kravinsky is a senior field correspondent covering stories about Sonora and the border from the Hermosillo, Mexico, bureau of KJZZ’s Fronteras Desk.