The cattle-killing New World Screwworm has been found in the U.S., prompting a slew of southern states to issue new rules to help fight the spread of the parasitic insect.
Florida Agriculture Commissioner Wilton Simpson issued an emergency rule to tighten restrictions on bringing warm-blooded animals — the insect's preferred breeding ground — into the Sunshine State. Animals from infestation zones and other "high-risk areas" will be subject to the new rule, according to News 6 Orlando.