Table 1.

OPV seropositivity of equids by mesoregion.

Mesoregions	OPV antibody positive∗[n(%)]	Total
RI	3 (4.8)†	63
RII	27 (21.1)	128
RIII	19 (25.3)	75
RIV	45 (29.4)†	153
RV	12 (20)	60
RVI	12 (17.1)	70
RVII	10 (13.9)	72
Total	128 (20.6)	621

^∗positive by either PRNT or ELISA. ^† > 8% deviation from that expected by chance alone.