Cattle and hogs higher early Monday ... Instead the market latched on to the weekend headline about New World Screw worm detected in a Mexican cow and border restrictions that followed.

Mexico made a first shipment of sterile parasitic flies to Uruguay to help combat the cattle “screw worm” or Cochliomyia hominivorax, an insect whose larvae or maggots eat living tissue ...

Thousands of cases of screw worm infection have been detected in cattle in Panama, even though it was declared screw worm-free in 2006. And this week the US suspended imports of cattle from Mexico ...