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Johnson ACB, Biddle AS. The Use of Molecular Profiling to Track Equine Reinfection Rates of Cyathostomin Species Following Anthelmintic Administration. Animals (Basel). 2021;11(5)doi: 10.3390/ani11051345.
Johnson, A. C. B., & Biddle, A. S. (2021). The Use of Molecular Profiling to Track Equine Reinfection Rates of Cyathostomin Species Following Anthelmintic Administration. Animals : an open access journal from MDPI, 11(5), . https://doi.org/10.3390/ani11051345
Johnson, Alexa C B, and Biddle, Amy S. "The Use of Molecular Profiling to Track Equine Reinfection Rates of Cyathostomin Species Following Anthelmintic Administration." Animals : an open access journal from MDPI vol. 11,5 (2021). doi: https://doi.org/10.3390/ani11051345
Johnson ACB, Biddle AS. The Use of Molecular Profiling to Track Equine Reinfection Rates of Cyathostomin Species Following Anthelmintic Administration. Animals (Basel). 2021 May 09;11(5). doi: 10.3390/ani11051345. PMID: 34065099; PMCID: PMC8150961.
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Animals (Basel). 2021 May 09;11(5). doi: 10.3390/ani11051345.

The Use of Molecular Profiling to Track Equine Reinfection Rates of Cyathostomin Species Following Anthelmintic Administration.

Animals : an open access journal from MDPI

Alexa C B Johnson, Amy S Biddle

Affiliations

  1. Department of Animal and Food Sciences, University of Delaware, Newark, DE 19716, USA.

PMID: 34065099 PMCID: PMC8150961 DOI: 10.3390/ani11051345

Abstract

Cyathostomins are a multispecies parasite ubiquitous in Equids. Cyathostomins have developed resistance to all but one class of anthelmintics, but species-level sensitivity to anthelmintics has not been shown. This study measured reinfection rates of cyathostomin species following the administration of three commercial dewormers. Nine treated horses were compared with 90 untreated controls during June-September 2017-2019. Ivermectin (IVM) (n = 6), Moxidectin (MOX) (n = 8) or Pyrantel (PYR) (n = 8) were orally administered. Fecal samples were collected every 14 d for 98 d. Fecal egg count reductions (FECR) were calculated using a modified McMaster technique. Nineteen cyathostomin species were identified by 5.8S-ITS-2 profiling using amplicon sequencing. Data were analyzed in QIIME1 and R statistical software using presence/absence methods. MOX had the lowest numbers of species present over the time course, followed by PYR then IVM (7.14, 10.17, 11.09, respectively); however, FECR was fastest for PYR. The presence of seven species:

Keywords: amplicon sequencing; anthelmintic; cyathostomin; equine; fecal egg count; resistance; strongyle

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