The U.S. Department of Agriculture said a second case in Zavala County was detected on a ranch about 5 miles from the first.

As New World screwworm enters the U.S. for the first time in decades, we should be vigilant but not panic, experts told USA ...

The New World screwworm fly is threatening the $113 billion U.S. cattle industry for the first time in more than a half ...

In a groundbreaking new study, researchers modified a human hookworm and got it to manufacture and secrete functional human ...

The parasites were identified in a bovine in southern Texas. This marks the third time the cattle-threatening pests have been found in the U.S. and the first in Texas since they were eradicated in 196 ...

The New World screwworm, a fly whose larvae feed on the living tissue of warm-blooded animals, was eradicated from the U.S.

Texas confirms a New World screwworm case in Zavala County, raising alarms for ranchers, pets and wildlife after decades.

A flesh-eating parasite that was eliminated from the U.S. decades ago has been detected in a Texas calf, prompting an aggressive federal response. While there is no immediate threat to Houston ...

Parasites in water, on land, and in food can make you sick during the summer. Avoid swallowing water or getting it up your ...

If you’ve taken a walk along the Columbia, Lewis or Washougal rivers, or any of the many tributaries that bring salmon to Clark County, you may have noticed an increase in the number of anglers and di ...

Leishmania are microscopic parasites spread by infected sand flies that cause leishmaniasis, a group of diseases ranging from skin ulcers to life-threatening infections of internal organs. Credit: ...