Acarapis woodi

{{Short description|Species of mite}}

{{Speciesbox

| image = Tracheal mite - Acarapis woodi.jpg

| taxon = Acarapis woodi

| authority = (Rennie, 1921)

}}

Acarapis woodi is an internal parasite affecting honey bees,{{cite web|url=http://www.sel.barc.usda.gov/acari/content/trachealmites.html |title="Tracheal mites" Tarsonemidae |publisher=Agricultural Research Service, United States Department of Agriculture |date=February 18, 2005 |access-date=March 10, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20110517030353/http://www.sel.barc.usda.gov/acari/content/trachealmites.html |archive-date=May 17, 2011 }} the symptoms of infestation were originally observed on the Isle of Wight in 1904,{{cite book|author=Anderson, John|author2=Rennie, John|title=Observations and experiments bearing on the "Island of Wight" disease|year=1916|location=Edinburgh|publisher=R. Grant & Son|url=http://catalog.hathitrust.org/Record/005782776|series=Proceedings of the Royal Physical Society of Edinburgh; v. 20, pt. 1}} but was not described until 1921. Acarapis woodi mites live and reproduce in the tracheae of the bees. The symptoms of Acarapis woodi infestation were originally called by beekeepers as the Isle of Wight Disease, however it is now called Acarine, after the subclass to which the mites belong. All mites are arachnids like spiders.{{cite web |author=H. A. Denmark, H. L. Cromroy & Malcolm T. Sanford |url=http://entomology.ifas.ufl.edu/creatures/misc/bees/tracheal_mite.htm |title=Honey bee tracheal mite, Acarapis woodi |work=Featured Creatures |publisher=University of Florida |year=2000 |access-date=March 10, 2011}} The female mite attaches 5–7 eggs to the tracheal walls, where the larvae hatch and develop in 11–15 days to adult mites. The mites parasitize young bees up to two weeks old through the tracheal tube openings. There, they pierce the tracheal tube walls with their mouthparts and feed on the haemolymph of the bees. More than a hundred mites can populate the tracheae and weaken the bees. The mites are generally less than {{convert|175|um|3}} long, and can be seen and identified only under a microscope. Mercedes Delfinado identified Acarapsis woodi's presence in the USA.{{Cite book |url=http://archive.org/details/CAT30852465 |title=110 years of biological control research and development in the United States Department of Agriculture : 1883-1993 |date=2000 |publisher=[Beltsville, MD?] : U.S. Dept. of Agriculture, Agricultural Research Service; Springfield, VA : Available from National Technical Information Service |others=National Agricultural Library U. S. Department of Agriculture}}

Other mites similar in appearance include Acarapis externus and Acarapis dorsalis.{{Citation needed|date = December 2023}}