The mouth, gills, opercula and fins were examined for the presence of ectoparasites, and the viscera and gastrointestinal tract, for the presence of endoparasites. The collection, fixation, counting, ...
AUSTIN, Texas (KXAN) — A parasitic worm eradicated in the United States nearly 60 years ago could be threatening a comeback, Texas wildlife officials warn. The New World Screwworm was recently ...