Table 1. The changing pattern of LF infection rates determined by night blood and ICT surveys across the 6 administrative divisions in The Gambia between 1951 and 2013.

Year	Administrative Division	Age group examined	Survey type and number of sampling sites	Site specific infection rate	Notes	References #
1951–1954	Western	All age groups	Night blood surveys in 4 villages	36–50%	1951 survey in area hyperendemic for malaria. No infections found in children younger than 4.5 years. 1954 survey also failed to detect mf in children <4 years.	4, 19–21,30–31
1974–1976	Western, Central, and Upper River	≥3 years	Night blood surveys in 15 villages	1.5% (≥ 3 yrs), 6.7–22.7% (≥ 5 yrs), 2.9–26.9% (≥ 15 yrs)	Night blood surveys	21
1997–2000	North Bank, Upper River and Western	≥12 years	ICT surveys on samples from 3 villages	0–8%	ICT tests performed on stored serum samples collected for a malaria project.	Current study
2003	Banjul, Central, Lower River, North Bank, Upper River and Western	≥15 years	ICT mapping surveys in 30 villages	0–3%	Mapping survey carried out in collaboration with the Ministry of Health and Social Welfare, Gambia.	Current study
2013	Banjul, Central, Lower River, North Bank, Upper River and Western	6–7 years	ICT TAS surveys in 60 schools	0%	Transmission assessment survey conducted in collaboration with the Ministry of Health and Social Welfare, Gambia	Current study