Selective Anthelmintic Treatment in Horses in Sweden Based on Coprological Analyses: Ten-Year Results

Overview

Journal Animals (Basel)

Date 2023 Sep 9

PMID 37685005

Authors

Eva Osterman-Lind

Mia Holmberg

Giulio Grandi

Affiliations

Soon will be listed here.

Abstract

In Sweden, routine deworming has been used for several decades; however, to slow down the development of anthelmintic resistance, selective treatment is currently recommended. As part of a monitoring programme, equestrian premises submitted faecal samples to the National Veterinary Institute (SVA) twice per year between 2008 and 2017. Analyses for strongyles (small and large), tapeworms and ascarids, followed by premise-specific advice regarding deworming and parasite control strategies, were provided. In total, 43,330 faecal samples, collected from 26,625 horses on 935 premises in springtime (March to June), were analysed by quantitative or semi-quantitative flotation. Moreover, was detected by larval culture or PCR. Between 4 and 11% of individual horses tested positive for and 3-10% were shedding tapeworm eggs. There were recurrent high and low egg shedders; 75% of horses with appeared to have been recently introduced into the herd; the proportion of -positive premises increased when individual samples rather than pooled samples were used. Based on the results of diagnostics and strongyle egg-shedding level, 59% of the horses did not need to be dewormed.

References

Osterman Lind E, Hoglund J, Ljungstrom B, Nilsson O, Uggla A . A field survey on the distribution of strongyle infections of horses in Sweden and factors affecting faecal egg counts. Equine Vet J. 1999; 31(1):68-72. DOI: 10.1111/j.2042-3306.1999.tb03793.x. View

Meana A, Pato N, Martin R, Mateos A, Perez-Garcia J, Luzon M . Epidemiological studies on equine cestodes in central Spain: infection pattern and population dynamics. Vet Parasitol. 2005; 130(3-4):233-40. DOI: 10.1016/j.vetpar.2005.03.040. View

Lester H, Spanton J, Stratford C, Bartley D, Morgan E, Hodgkinson J . Anthelmintic efficacy against cyathostomins in horses in Southern England. Vet Parasitol. 2013; 197(1-2):189-96. DOI: 10.1016/j.vetpar.2013.06.009. View

Schneider S, Pfister K, Becher A, Scheuerle M . Strongyle infections and parasitic control strategies in German horses - a risk assessment. BMC Vet Res. 2014; 10:262. PMC: 4232665. DOI: 10.1186/s12917-014-0262-z. View

Nielsen M, Vidyashankar A, Olsen S, Monrad J, Thamsborg S . Strongylus vulgaris associated with usage of selective therapy on Danish horse farms-is it reemerging?. Vet Parasitol. 2012; 189(2-4):260-6. DOI: 10.1016/j.vetpar.2012.04.039. View

Herd R . Epidemiology and control of equine strongylosis at Newmarket. Equine Vet J. 1986; 18(6):447-52. DOI: 10.1111/j.2042-3306.1986.tb03684.x. View

Nielsen M, Peterson D, Monrad J, Thamsborg S, Olsen S, Kaplan R . Detection and semi-quantification of Strongylus vulgaris DNA in equine faeces by real-time quantitative PCR. Int J Parasitol. 2007; 38(3-4):443-53. DOI: 10.1016/j.ijpara.2007.07.014. View

Hoglund J, Ljungstrom B, Nilsson O, Lundquist H, Osterman E, Uggla A . Occurrence of Gasterophilus intestinalis and some parasitic nematodes of horses in Sweden. Acta Vet Scand. 1997; 38(2):157-65. PMC: 8057032. View

Jurgenschellert L, Krucken J, Austin C, Lightbody K, Bousquet E, von Samson-Himmelstjerna G . Investigations on the occurrence of tapeworm infections in German horse populations with comparison of different antibody detection methods based on saliva and serum samples. Parasit Vectors. 2020; 13(1):462. PMC: 7488081. DOI: 10.1186/s13071-020-04318-5. View

10.

Matthews J . Anthelmintic resistance in equine nematodes. Int J Parasitol Drugs Drug Resist. 2014; 4(3):310-5. PMC: 4266799. DOI: 10.1016/j.ijpddr.2014.10.003. View

11.

Raza A, Qamar A, Hayat K, Ashraf S, Williams A . Anthelmintic resistance and novel control options in equine gastrointestinal nematodes. Parasitology. 2018; 146(4):425-437. DOI: 10.1017/S0031182018001786. View

12.

Nielsen M, Scare J, Gravatte H, Bellaw J, Prado J, Reinemeyer C . Changes in Serum Strongylus Vulgaris-Specific Antibody Concentrations in Response to Anthelmintic Treatment of Experimentally Infected Foals. Front Vet Sci. 2015; 2:17. PMC: 4672185. DOI: 10.3389/fvets.2015.00017. View

13.

Nilsson O, Ljungstrom B, Hoglund J, Lundquist H, Uggla A . Anoplocephala perfoliata in horses in Sweden: prevalence, infection levels and intestinal lesions. Acta Vet Scand. 1995; 36(3):319-28. PMC: 8095443. View

14.

Kaspar A, Pfister K, Nielsen M, Silaghi C, Fink H, Scheuerle M . Detection of Strongylus vulgaris in equine faecal samples by real-time PCR and larval culture - method comparison and occurrence assessment. BMC Vet Res. 2017; 13(1):19. PMC: 5225560. DOI: 10.1186/s12917-016-0918-y. View

15.

Tyden E, Enemark H, Andersson Franko M, Hoglund J, Osterman-Lind E . Prevalence of in horses after ten years of prescription usage of anthelmintics in Sweden. Vet Parasitol X. 2020; 2:100013. PMC: 7458386. DOI: 10.1016/j.vpoa.2019.100013. View

16.

Scheuerle M, Stear M, Honeder A, Becher A, Pfister K . Repeatability of strongyle egg counts in naturally infected horses. Vet Parasitol. 2016; 228:103-107. DOI: 10.1016/j.vetpar.2016.08.021. View

17.

Engell-Sorensen K, Pall A, Damgaard C, Holmstrup M . Seasonal variation in the prevalence of equine tapeworms using coprological diagnosis during a seven-year period in Denmark. Vet Parasitol Reg Stud Reports. 2019; 12:22-25. DOI: 10.1016/j.vprsr.2018.01.002. View

18.

Corbett C, Love S, Moore A, Burden F, Matthews J, Denwood M . The effectiveness of faecal removal methods of pasture management to control the cyathostomin burden of donkeys. Parasit Vectors. 2014; 7:48. PMC: 3904009. DOI: 10.1186/1756-3305-7-48. View