Equine Piroplasmosis Associated with<i>Amblyomma cajennense</i>Ticks, Texas, USA

Glen A. Scoles, H. Joel Hutcheson, Jack L. Schlater, Steven G. Hennager, Angela M. Pelzel, Donald P. Knowles

Emerging infectious diseases · 2011 · 68 citations · 9 references

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Abstract

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.

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