** Shares of animal health companies rise after a confirmed case of New World screwworm (NWS) in Texas

** Zoetis ZTS.N gains 4.3%, Elanco Animal Health ELAN.N jump 5.1%

** Zoetis' doramectin shot has the U.S. FDA's Emergency Use Authorization for prevention and treatment of infestations caused by NWS

** Elanco provides multiple treatment or prevention options for dogs, cats and a variety of livestock to protect against NWS

** NWS is a parasitic fly whose larvae infest the living flesh of warm-blooded animals, including livestock, pets, wildlife and humans

** An infestation can cause severe tissue destruction, excruciating pain and rapid death in host animals, if left untreated

** Including session's move, ZTS down 35.9%, ELAN up 15.2% YTD