Variation in frequency in breeding of Anopheles gambiae s.l. and its relationship with in-door adult mosquito density in various localities in Accra, Ghana.

The work reported in this paper was undertaken to determine whether in a large urban area like Accra, emerging Anopheles gambiae s.l. adults are likely to invade the nearest houses to obtain a blood meal. Using data from previous studies, the frequency in breeding was compared with adult density graphically and by scatter diagrams. Graphically, frequency in breeding was associated with adult density in eight districts while on the geometric scatter plot, these parameters were associated in ten districts. The finding of association of low frequency in breeding with moderate adult density in only one district and a correlation coefficient significant at p less than 0.001 on 14 degrees of freedom for 8 districts indicates that in the majority of districts, most adult mosquitoes invaded the nearest human habitation.