How Thailand eliminated lymphatic filariasis as a public health problem

Table 6 Transmission Assessment Surveys (TAS) 2012–2017: Coverage and results

Year	Number of provinces	Number of EUs	Number of IUs	Number of children tested	Species^a/Test	Number children positive for antigen or antibody ^b/ critical cut off value	Number of mf positive children ^c	Contact survey result
2012–	10	EU-1	260	1786	WB/Ag	0 /11	0	–
2013 (TAS-1)		EU-2	10	129	BM/Ab	1 / 2	0	–
		EU-3	87	1018	BM/Ab	7/16	2	Negative
2015 (TAS-2)	1	EU-3.1	18	284	BM/Ab	2 / 3	0	–
		EU-3.2	32	506	BM/Ab	3 / 6	0	–
		EU-3.3	37	506	BM/Ab	6 / 6	2	Negative
2016–2017 (TAS-3)	11	EU-1	260	2233	WB/Ag ^d	0 /11	0	–
2016–2017 (TAS-3)	11	EU-2	10	144	BM/Ab	0 / 2	0	–
		EU-3.1	18	284	BM/Ab	0 / 3	0	–
		EU-3.2	32	506	BM/Ab	0 / 6	0	–
		EU-3.3	37	530	BM/Ab	4 / 6	3	Negative

EUs Evaluation units; IUs: Intervention units
^a WB: Wuchereria bancrofti; BM: Brugia malayi
^b Antigen (Ag) with immunochromatographic test (ICT); Antibody (Ab) with Brugia Rapid test
^c Among Ag or Ab positive children
^d Filaria Test Strip (FTS) was used instead of ICT

ISSN: 2049-9957