Table 4.

Reports of anthelmintic resistance in equine ascarids. For each study, anthelmintic classes evaluated are indicated with an X. Studies reporting anthelmintic resistance to a given class are marked with AR. Thus, X means that resistance was tested, but not found, and X-AR means that resistance was tested and found.

Country	Reference	Benzimidazoles	Pyrimidines	Macrocyclic lactones
Australia	Armstrong et al. (2014)	X-AR	X-AR	X-AR
	Beasley et al. (2015)			X-AR
	Wilkes et al. (2017)			X-AR
Argentina	Cooper et al. (2020)	X		X-AR
Brazil	Felippelli et al. (2015)			X-AR
Canada	Hearn and Peregrine (2003)			X-AR
	Slocombe et al. (2007)	X	X	X-AR
Czech Republic	Bodeček et al. (2018)		X	X-AR
Denmark	Schougaard and Nielsen (2007)		X	X-AR
Estonia	Lassen and Peltola (2015)			X-AR
Finland	Näreaho et al. (2011)			X-AR
	Hautala et al. (2019)	X	X-AR
France	Laugier et al. (2012)			X-AR
	Geurden et al. (2013)	X	X	X-AR
Germany	von Samson-Himmelstjerna et al. (2007)		X	X-AR
Iceland	Martin et al. (2021a)			X-AR
Italy	Veronesi et al. (2009)		X	X-AR
	Veronesi et al. (2010)		X	X-AR
Netherlands	Boersema et al. (2002)		X	X-AR
New Zealand	Bishop et al. (2014)			X-AR
	Morris et al. (2019)	X		X-AR
Poland	Studzińska et al. (2020)			X-AR
Saudi Arabia	Alanazi et al. (2017)	X-AR		X-AR
Sweden	Lindgren et al. (2008)	X	X	X-AR
	Lind and Christensson (2009)	X	X	X-AR
	Martin et al. (2018)	X	X-AR
	Martin et al. (2021b)	X-AR
Turkey	Cirak et al. (2010)		X	X-AR
United Kingdom	Stoneham and Coles (2006)	X		X-AR
	Relf et al. (2014)	X		X-AR
United States	Craig et al. (2007)		X-AR	X-AR
	Reinemeyer et al. (2010)		X	X-AR