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Table 3 Details of interim surveys done in provinces endemic for Wuchereria bancrofti

From: How Thailand eliminated lymphatic filariasis as a public health problem

Province Year Age group Antigen surveya Microfilaria (mf) survey
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 Positive case Highest prevalence observed in IUs surveyed (range) 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 Positive case Highest prevalence observed in IUs surveyed (range)
Mae Hong Son 2002 All 0 0 0 0 0 0 0 15 2724 2122 2 509 509 9 2.4%
(1.0–2.4%)
2003 All 14 2485 1733 2 318 245 5 3.2% (0.8–3.2%) 1    1 84 52 0 1.9%
2004 All 12 1909 1538 0 0 0 0 0 0 0 0 0 0 0 0
2005 All 3 651 403 0 0 0 0 0 8 1182 753 0 0 0 0 0
Chiang Mai 2004 All 0 0 0 0 0 0 0 0 1 977 159 0 0 0 0 0
2005 All 1 646 31 0 0 0 0 0 1 1240 326 0 0 0 0 0
Lamphun 2003 All 0 0 0 0 0 0 0 0 2 2985 655 0 0 0 0 0
2004 All 0 0 0 0 0 0 0 0 2 2072 738 0 0 0 0 0
2005 All 1b 982 75 0 0 0 0 0 1 982 623 0 0 0 0 0
Tak 2002 All 20 5694 4242 2 903 408 3 2.6% (0.3–2.6%) 1 458 46 0 0 0 0 0
2003 All 26 6034 4795 2 194 145 6 10.4% (1.0–10.4%) 6 2535 1840 0 0 0 0 0
2004 All 13 2496 2786 6 1671 1283 13 6.7% (0.2–6.7%) 3 632 382 0 0 0 0 0
2005 All 8b 2386 240 1 331 284 1 0.4% 11b 3145 2358 0 0 0 0 0
Ratchaburi No survey data
Kanchanaburi 2002 All 38 14 410 9311 6 3497 2292 28 2.2% (0.5–2.2%) 0 0 0 0 0 0 0 0
2003 All 8 2991 2523 1 240 164 11 6.7% 4 1342 1319 0 0 0 0 0
2004 All 8 3575 2696 0 0 0 0 0 6 1152 982 0 0 0 0 0
2005 All 12 4524 543 2 327 252 6 2.5% (2.2–2.5%) 10 4197 3546 0 0 0 0 0
Ranong No survey data
  1. IUs: Intervention units
  2. aAntigen assessment, which is more sensitive than mf assessment, could not be adopted in every survey due to immunochromatographic test (ICT) card supply constraints
  3. bThese IUs used both ICT card & mf detection