Table 4.

Details of interim surveys done in provinces endemic for Brugia malayi

Province	Year	Age-group surveyed	Number of IUs surveyed	Total population in IUs surveyed	Total number of people tested in IUs surveyed	Number of IUs with positive result	Total number of population in IUs where found positive	Total number of people tested in IUs where found positive	Number of positive cases	Highest prevalence observed in IUs surveyed (range)
Microfilaria (mf) surveys
Surat Thani	2002	All	4	2580	1447	4	2580	1447	5	10.0% (0.2–10.0%)
	2003	All	1	587	454	0	0	0	0	0
	2004	All	1	591	475	0	0	0	0	0
	2005	All	2	1585	978	1	632	549	2	0.4% (0–0.4%)
Nakhon Si Thammarat	2002	All	1	613	609	0	0	0	0	0
	2003	All	2	777	757	0	0	0	0	0
	2004	All	2	879	741	1	747	624	2	0.3% (0–0.3%)
	2005	All	2	873	672	0	0	0	0	0
Krabi	2002	All	1	425	403	0	0	0	0	0
	2003	All	2	653	382	0	0	0	0	0
	2004	All	2	654	420	0	0	0	0	0
	2005	All	1	431	362	0	0	0	0	0
Narathiwat	2002	All	28	15 501	11 791	23	13 125	11 119	84	3.5% (0.2–3.5%)
	2003	All	25	18 873	12 852	15	10 372	7211	32	1.6% (0.2–1.6%)
	2004	All	20	14 072	9239	9	7281	4683	18	1.1% (0.1–1.1%)
	2005	All	24	18 373	10 097	16	11 872	6490	33	1.6% (0.1–1.6%)
	2007	All	34	28 557	17 512	15	15 670	8589	19	2.1% (0.1–2.1%)
	2008	All	35	29 720	18 931	5	3982	2295	5	0.5% (0.2–0.5%)
	2009	All	23	19 975	14 000	6	6958	4642	13	0.5% (0.1–0.5%)

IUs Intervention units