U.S. not ready to lift Mexican cattle ban over screwworm

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Agriculture Secretary Brooke Rollins has said the U.S. is not yet ready to reopen its border to Mexican cattle amid the outbreak of the flesh-eating New World screwworm parasite. "We're still not at the point where I am comfortable opening the ports, but I think every day that goes by we get a little bit closer," Rollins told Reuters. "I want to have every confidence that we have overturned every stone, that we understand every nuance, that we are deploying every tool in the toolkit," she added. The border has been largely closed to Mexican livestock since May