The US Food and Drug Administration has approved the emergency use of an over-the-counter animal drug to treat infections of New World screwworm , a potentially deadly parasite in cats and dogs.  The announcement comes after two states noted New World screwworm infections. In Texas, the parasite was detected in cows and goats, and in New Mexico, a dog was infected.  These are the first noted cases in animals since at least 2017, when a small outbreak was found and eradicated in Florida,