Table 1.

Results of the buffalo serological survey by indirect-ELISA in 8 provinces of Thailand.

Region	Provinces	Census 2009	n	n +	AP (%)	TP (%)	PF (%)	PiF (%)
					(95% CI)	(95% CI)
North	Maehongson	23,761	100	18	18	13.6	38.1	39.2
					(11.7–26.7)	(6–23.4)
Northeast	Buriram	105,177	138	17	12.3	7.3	30.4	44.9
					(7.8–18.8)	(1.9–14.7)
	Roi Et	70,23	81	11	13.6	8.7	17.1	64.3
					(7.8–22.7)	(1.7–18.7)
	Sakon Nakhon	75,647	208	27	13.0	8	18	79.7
					(9.1–18.2)	(3.5–13.8)
	Sisaket	98,427	59	1	1.7	0	4.5	100.0 (1 infected)
					(0.3–9)	(0–3.3)
	Surin	120,886	73	7	9.6	4.2	25	45.7
					(4.7–18.5)	(0–14.1)
	Ubon Ratcha.	136,528	138	6	4.3	0	10.8	47.2
					(2–9.2)	(0–7.6)
South	Songkhla	4,431	95	22	23.2	19.4	71.4	29.2
					(15.8–32.6)	(10.8–29.8)
Total		635,087	892	109	12.2	7.2	20.3	55.7
					(10.2–14.5)	(4.9–9.8)

n: number of serum samples tested. n ⁺: number of seropositive samples by indirect-ELISA. CI: confidence interval. AP: apparent seroprevalence rate per province (AP = n ⁺/n). TP: true prevalence estimates. PF: percentage of infected farms (at least one seropositive sample). PiF: mean seroprevalence rate on infected farms.