Five years of post-validation surveillance of lymphatic filariasis in Thailand

Table 4 Vector surveys: 2018–2022: 11 provinces: Number of IUs, mosquitoes dissected and positive with Mf and larva

Province	Total No. of IUs surveyed	2018		2019		2020		2021		2022
Province	Total No. of IUs surveyed	No. of mosquitoes dissected	No. of mosquitoes with Mf	No. of mosquitoes dissected	No. of mosquitoes with Mf	No. of mosquitoes dissected	No. of mosquitoes with Mf	No. of mosquitoes dissected	No. of mosquitoes with Mf	No. of mosquitoes dissected	No. of mosquitoes with Mf
Chiang Mai	1	0	0	0	0	0	0	29	0	0	0
Lamphun	1	0	0	0	0	0	0	0	0	63	0
Kanchanaburi	19	0	0	361	0	162	0	34	0	975	0
Krabi	1	0	0	0	0	0	0	0	0	26	0
Mae Hong Son	6	272	0	60	0	0	0	35	0	90	0
Nakhon Si Thammarat	2	26	0	0	0	0	0	0	0	30	0
Narathiwat	9	1132	1^a	2344	5^b	493	0	1036	0	514	0
Ranong	1	0	0	71	0	0	0	0	0	0	0
Ratchaburi	1	0	0	55	0	0	0	0	0	0	0
Surat Thani	2	108	0	0	0	0	0	0	0	12	0
Tak	4	231	0	381	0	0	0	0	0	0	0

^aMa. Annulata/ stage L2 (1 specimen)
^bMa. bonneae, stage L1,L2 (2 specimens), Ma. annulata, stage L1,L2 (1 specimen), Cq. Crassipes, stage L3 (1 specimen), Ma. Annulata, stage L2 (1 specimen) L = Larva stage, IU implementation unit

ISSN: 2049-9957