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The screwworms are here, as we in South America and made it all the way to Texas, where they have not been seen since 1966. There are now five cases of the flesh-eating parasite in the United States, all confirmed in under a week. The first two were in calves in Zavala County, followed soon after by a calf in La Salle County; a goat in Gillespie County; and a dog that lives in Lea County, N.M., but recently traveled through Texas. These five cases are alarming but expected, as Secretary of Ag...