Equine Piroplasmosis Associated with Amblyomma cajennense Ticks, Texas, USA

@inproceedings{Scoles2011EquinePA,
  title={Equine Piroplasmosis Associated with Amblyomma cajennense Ticks, Texas, USA},
  author={Glen A. Scoles and Heather Hutcheson and Jack L. Schlater and Steven G. Hennager and Angela M. Pelzel and Donald P. Knowles},
  booktitle={Emerging infectious diseases},
  year={2011}
}
We report an outbreak of equine piroplasmosis in southern Texas, USA, in 2009. Infection prevalence reached 100% in some areas (292 infected horses). Amblyomma cajennense was the predominant tick and experimentally transmitted Theileria equi to an uninfected horse. We suggest that transmission by this tick species played a role in this outbreak.