The word "parasitic" describes something or someone that relies on and benefits from another entity, often at the expense or harm of that entity. Full definition
School - aged children experience some of the greatest burdens of parasitic infections of all age groups, including... (thiswormyworld.org)
A new medical atlas, called This Wormy World, will document the best knowledge of the locations and varieties of parasitic worm infections, which should lead to better treatment allocation. (scientificamerican.com)
Jeremy Mathis, director of NOAA's Arctic Research Program, said the report highlights the clear and pronounced global warming signal in the Arctic and its effects cascading throughout the environment, like the spread of parasitic diseases in Arctic animals. (insideclimatenews.org)