Bird Flu May Have Disappeared, But A Parasite “Screwworm” Has Come For The Beef Beef ranchers in Mexico have been struggling with a parasite called a "screwworm". The flesh-eating parasite has been infecting cattle to the point that the United States has banned entry into the country from Mexican-raised beef cattle. https://www.shtfplan.com/headline-news/bird-flu-may-have-disappeared-but-a-parasite-screwworm-has-come-for-the-beef