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First molecular evidence of Babesia caballi and Theileria equi infections in horses in Cuba

Abstract

Equine piroplasmosis is a disease of Equidae, including horses, donkeys, mules, and zebras, caused by either Theileria equi or Babesia caballi. This disease represents a serious problem for the horse industry and its control is critical for the international trade of horses. The objective of the present study was to detect B. caballi and T. equi infections in horses reared in western Cuba. Blood samples from 100 horses were tested for the presence of piroplasms by using Giemsa-stained blood smears and nested PCR (nPCR) assays targeting merozoite antigen genes of B. caballi (bc48) and T. equi (ema-1). All animals were inspected for the detection of tick infestation and tick specimens were collected for species identification. Erythrocyte inclusions were observed in 13 (13%) of the analyzed samples. nPCR analysis showed that 25 (25%) samples were positive for B. caballi, 73 (73%) for T. equi, and 20 (20%) showed dual infections. Only one tick species was found infesting horses, Dermacentor nitens. In addition, three nearly full-length sequences of T. equi 18S rRNA gene were obtained and subjected to phylogenetic analyses. This study reports a high prevalence of T. equi and B. caballi single and coinfections in horses in western Cuba. Molecular analysis of the 18S rRNA gene of T. equi suggested that different genotypes of this hemoparasite circulate in Cuba. To the best of our knowledge, this is the first report describing the molecular detection of B. caballi and T. equi in horses in Cuba.

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Acknowledgements

The authors would like to thank Dr. MVZ Osvaldo Fonseca Rodríguez for his kindness in preparing the map included in this study, as well as Nelson Albelo Chávez and Eleuterio Hernández Hernández for their technical assistance, and Dr. nat. sc. Marina L. Meli at University of Zurich (UZH) for her very helpful comments on the manuscript.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Author information

Correspondence to Belkis Corona-González.

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The authors declare that they have no conflict of interest.

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Section Editor: Neil Bruce Chilton

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Díaz-Sánchez, A.A., Pires, M.S., Estrada, C.Y. et al. First molecular evidence of Babesia caballi and Theileria equi infections in horses in Cuba. Parasitol Res 117, 3109–3118 (2018). https://doi.org/10.1007/s00436-018-6005-5

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Keywords

  • Equine piroplasmosis
  • Babesia caballi
  • Theileria equi
  • nPCR
  • 18S rRNA