Austin SM, DiPietro JA, Foreman JH, Baker GJ, Todd KS (1991): Comparison of the efficacy of ivermectin, oxibendazole, and pyrantel pamoate against 28-day Parascaris equorum larvae in the intestine of pony foals. Journal of the American Veterinary Medical Association 198, 1946–1949.Bodeček Štěpán, Vavrouchová Eva (2013): Monitoring of anthelmintic resistance in small strongyles in the Czech Republic in the years 2006–2009. Acta Veterinaria Brno, 82, 243-248  https://doi.org/10.2754/avb201382030243Boersema J. H., Eysker M., Nas J. W. M. (2002): Apparent resistance of Parascaris equorum to macrocylic lactones. Veterinary Record, 150, 279-281  https://doi.org/10.1136/vr.150.9.279Brady Heidi A., Nichols Wade T. (2009): Drug Resistance in Equine Parasites: An Emerging Global Problem. Journal of Equine Veterinary Science, 29, 285-295  https://doi.org/10.1016/j.jevs.2009.04.186Canever Ricardo J., Braga Pollyana R.C., Boeckh Albert, Grycajuck Marcelly, Bier Daniele, Molento Marcelo B. (2013): Lack of Cyathostomin sp. reduction after anthelmintic treatment in horses in Brazil. Veterinary Parasitology, 194, 35-39  https://doi.org/10.1016/j.vetpar.2012.12.020Chroust K (1998): The first occurrence of anthelmintic resistance in strongylid nematodes of sheep and horses in Czech Republic. Parasitology International, 47, 242-  https://doi.org/10.1016/S1383-5769(98)80661-2Coles G.C., Bauer C., Borgsteede F.H.M., Geerts S., Klei T.R., Taylor M.A., Waller P.J. (1992): World Association for the Advancement of Veterinary Parasitology (W.A.A.V.P.) methods for the detection of anthelmintic resistance in nematodes of veterinary importance. Veterinary Parasitology, 44, 35-44  https://doi.org/10.1016/0304-4017(92)90141-UCraig T.M., Diamond P.L., Ferwerda N.S., Thompson J.A. (2007): Evidence of Ivermectin Resistance by Parascaris equorum on a Texas Horse Farm. Journal of Equine Veterinary Science, 27, 67-71  https://doi.org/10.1016/j.jevs.2006.12.002CRAVEN J., BJØRN H., HENRIKSEN S. A., NANSEN P., LARSEN M., LENDAL S. (1998): Survey of anthelmintic resistance on Danish horse farms, using 5 different methods of calculating faecal egg count reduction. Equine Veterinary Journal, 30, 289-293  https://doi.org/10.1111/j.2042-3306.1998.tb04099.xHearn F. Patrick D., Peregrine Andrew S. (2003): Identification of foals infected with Parascaris equorum apparently resistant to ivermectin. Journal of the American Veterinary Medical Association, 223, 482-485  https://doi.org/10.2460/javma.2003.223.482Herd R. P. (1990): Equine parasite control - Problems associated with intensive anthelmintic therapy. Equine Veterinary Education, 2, 41-47  https://doi.org/10.1111/j.2042-3292.1990.tb01378.x Ihler CF (1995): A field survey on anthelmintic resistance in equine small strongyles in Norway. Acta Veterinaria Scandinavica 36, 135–143.Kaplan Ray M. (2002): Anthelmintic resistance in nematodes of horses. Veterinary Research, 33, 491-507  https://doi.org/10.1051/vetres:2002035Kaplan Ray M. (2004): Drug resistance in nematodes of veterinary importance: a status report. Trends in Parasitology, 20, 477-481  https://doi.org/10.1016/j.pt.2004.08.001Kaplan R. M., Nielsen M. K. (2010): An evidence-based approach to equine parasite control: It ain't the 60s anymore. Equine Veterinary Education, 22, 306-316  https://doi.org/10.1111/j.2042-3292.2010.00084.xKaplan Ray M., Klei Thomas R., Lyons Eugene T., Lester Guy, Courtney Charles H., French Dennis D., Tolliver Sharon C., Vidyashankar Anand N., Zhao Ying (2004): Prevalence of anthelmintic resistant cyathostomes on horse farms. Journal of the American Veterinary Medical Association, 225, 903-910  https://doi.org/10.2460/javma.2004.225.903 Langrova I (1998): Seasonal prevalence and intensity of faecal helminth egg (larval) output in various categories of herds of horses during two grazing seasons. Helminthologia 35, 43–50.Lyons E. T., Drudge J. H., Tolliver S. C. (1976): Studies on the Development and Chemotherapy of Larvae of Parascaris equorum (Nematoda: Ascaridoidea) in Experimentally and Naturally Infected Foals. The Journal of Parasitology, 62, 453-  https://doi.org/10.2307/3279157Lyons E.T., Drudge J.H., Tolliver Sharon C. (2000): Larval Cyathostomiasis. Veterinary Clinics of North America: Equine Practice, 16, 501-513  https://doi.org/10.1016/S0749-0739(17)30092-5Lyons E. T., Tolliver S. C., Ionita M., Collins S. S. (2008): Evaluation of parasiticidal activity of fenbendazole, ivermectin, oxibendazole, and pyrantel pamoate in horse foals with emphasis on ascarids (Parascaris equorum) in field studies on five farms in Central Kentucky in 2007. Parasitology Research, 103, 287-291  https://doi.org/10.1007/s00436-008-0966-8Lyons E. T., Tolliver S. C., Ionita M., Lewellen A., Collins S. S. (2008): Field studies indicating reduced activity of ivermectin on small strongyles in horses on a farm in Central Kentucky. Parasitology Research, 103, 209-215  https://doi.org/10.1007/s00436-008-0959-7Näreaho A., Vainio K., Oksanen A. (2011): Impaired efficacy of ivermectin against Parascaris equorum, and both ivermectin and pyrantel against strongyle infections in trotter foals in Finland. Veterinary Parasitology, 182, 372-377  https://doi.org/10.1016/j.vetpar.2011.05.045 Nielsen MK, Wang J, Davis R, Bellaw JL, Lyons ET, Lear TL, Goday C (2014): Parascaris univalens – a victim of large-scale misidentification? Parasitology Research 113, 4485–4490.Lind Eva, Christensson Dan (2009): Anthelmintic efficacy on Parascaris equorum in foals on Swedish studs. Acta Veterinaria Scandinavica, 51, 45-  https://doi.org/10.1186/1751-0147-51-45Lind E. Osterman, Kuzmina T., Uggla A., Waller P. J., Höglund J. (2007): A Field Study on the Effect of Some Anthelmintics on Cyathostomins of Horses in Sweden. Veterinary Research Communications, 31, 53-65  https://doi.org/10.1007/s11259-006-3402-5Porr Cheryl A. Shea, Hedinger Victoria F., Hamm Lauren R., Ernst Morgan M., Papajeski Barbie M., Santiago Michelle L., Davis Amanda J. (2017): Effects of Ivermectin and Moxidectin on Fecal Egg Count and Egg Reappearance Rate in Horses. Journal of Equine Veterinary Science, 57, 51-55  https://doi.org/10.1016/j.jevs.2017.06.011Prichard R. K., Hall C. A., Kelly J. D., Martin I. C. A., Donald A. D. (1980): THE PROBLEM OF ANTHELMINTIC RESISTANCE IN NEMATODES. Australian Veterinary Journal, 56, 239-250  https://doi.org/10.1111/j.1751-0813.1980.tb15983.xReinemeyer Craig R (2009): Diagnosis and control of anthelmintic-resistant Parascaris equorum. Parasites & Vectors, 2, S8-  https://doi.org/10.1186/1756-3305-2-S2-S8Reinemeyer Craig R. (2012): Anthelmintic resistance in non-strongylid parasites of horses. Veterinary Parasitology, 185, 9-15  https://doi.org/10.1016/j.vetpar.2011.10.009 Reinemeyer CR, Prado JC, Vaala W (2010): Larvicidal efficacy of fenbendazole against a macrocyclic lactone-resistant isolate of Parascaris equorum. Proceedings of the American Association of Veterinary Parasitologists 55, 49.Relf Valerie E., Lester Hannah E., Morgan Eric R., Hodgkinson Jane E., Matthews Jacqueline B. (2014): Anthelmintic efficacy on UK Thoroughbred stud farms. International Journal for Parasitology, 44, 507-514  https://doi.org/10.1016/j.ijpara.2014.03.006 Sangster NC (1999): Pharmacology of anthelmintic resistance in cyathostomes: will it occur with the avermectins/milbemycins? Veterinary Parasitology 85, 189–204.Schougaard H., Nielsen M. K. (2007): Apparent ivermectin resistance of Parascaris equorum in foals in Denmark. Veterinary Record, 160, 439-440  https://doi.org/10.1136/vr.160.13.439Slocombe J. Owen D., de Gannes Rolph V.G., Lake Mary C. (2007): Macrocyclic lactone-resistant Parascaris equorum on stud farms in Canada and effectiveness of fenbendazole and pyrantel pamoate. Veterinary Parasitology, 145, 371-376  https://doi.org/10.1016/j.vetpar.2006.08.008Smith M.A., Nolan T.J., Rieger R., Aceto H., Levine D.G., Nolen-Walston R., Smith B.I. (2015): Efficacy of major anthelmintics for reduction of fecal shedding of strongyle-type eggs in horses in the Mid-Atlantic region of the United States. Veterinary Parasitology, 214, 139-143  https://doi.org/10.1016/j.vetpar.2015.09.025 Traversa D, Parente FI, Iorio R, Gatti A, Bartolini R, Fusco M, Di Lucente A, Paoletti B, Costanzo F, Klei T (2007): Valutazione dell efficacia dell oxibendazolo e della moxidectina neiconfronti dei cyathostomini resistenci al fenbendazolo. XIII Congresso Multisala SIVE, Italy Bologna 2007. 193–194.Traversa Donato, Castagna Giuseppe, von Samson-Himmelstjerna Georg, Meloni Silvana, Bartolini Roberto, Geurden Thomas, Pearce Michael C., Woringer Emmanuel, Besognet Bruno, Milillo Piermarino, D’Espois Melanie (2012): Efficacy of major anthelmintics against horse cyathostomins in France. Veterinary Parasitology, 188, 294-300  https://doi.org/10.1016/j.vetpar.2012.03.048Várady M, Königová A, Čorba J (2000): Benzimidazole resistance in equine cyathostomes in Slovakia. Veterinary Parasitology, 94, 67-74  https://doi.org/10.1016/S0304-4017(00)00366-6 Veronesi F, Fioretti DP, Genchi C (2010): Are macrocyclic lactones useful drugs for the treatment of Parascaris equorum infections in foals? Veterinary Parasitology 172, 164–167.von Samson-Himmelstjerna G., Fritzen B., Demeler J., Schürmann S., Rohn K., Schnieder T., Epe C. (2007): Cases of reduced cyathostomin egg-reappearance period and failure of Parascaris equorum egg count reduction following ivermectin treatment as well as survey on pyrantel efficacy on German horse farms. Veterinary Parasitology, 144, 74-80  https://doi.org/10.1016/j.vetpar.2006.09.036Wirtherle N., Schnieder T., von Samson-Himmelstjerna G. (2004): Prevalence of benzimidazole resistance on horse farms in Germany. Veterinary Record, 154, 39-41  https://doi.org/10.1136/vr.154.2.39