Erstmals seit 1966 hat die Neuwelt-Schraubenwurmfliege nachweislich ein Kalb in den USA befallen. Das Insekt legt seine Eier in offene Wunden von Tieren, in seltenen Fällen auch von Menschen.

The USDA said the only animal affected was a 3-week-old calf in Zavala County, Texas, after larvae were identified in its umbilical area.

Agriculture Secretary Brooke Rollins said the case was in a 3-week-old calf in LaPryor, Texas, about 50 miles from the Mexico border