Table 2. Tick species found on horses at index ranch of equine piroplasmosis outbreak in southern Texas, USA, 2009.

Species	No. (%) horses*	No. ticks			Average no. ticks/horse
		Male	Female	Nymph
Amblyomma cajennense	180 (78.9)	201	229	1	2.4
A. maculatum	45 (19.7)	43	33	0	1.7
Dermacentor (Anocentor) nitens	7 (3.0)	4	7	3	2
D. variabilis	37 (16.2)	20	34	0	1.6

*Of 228 horses sampled, 41 had >1 species of tick present.