Table 1.

Characteristics of the studied population in the dry season, parasitological and immunological data

	Dry seasona	January 2009	June 2009
Nb of children	681	371	310
Age, mean ± SD (years)	5.52 ± 2.5	5.27 ± 2.6	5.77 ± 2.4
Sex ratio (male/female)(%)	341/681 (50%)	188/183 (50.6%)	153/157 (49.4%)
Prevalence of P. falciparum infection (%)b	98/681 (14.4%)	87/371 (23.5%)	11/310 (3.5%)
Gametocyte carriage (%)	7/681 (1.0%)	3/371 (1.0%)	3/310 (1.0%)
% responders IgG anti-gSG6-P1c	102/681 (14.9%)	59/371 (15.9%)	43/310 (13.9%)

^aCumulative data for January and June 2009.

^bAll P. falciparum infection (malaria positive blood smear) with and without symptoms.

^cNumber and percentage (%) of immune responders of IgG Ab to An. gambiae gSG6-P1 peptide.