Variation of malaria transmission and morbidity with altitude in Tanzania and with introduction of alphacypermethrin treated nets

Table 2 Data leading to estimates of entomological inoculation rates in highlands and lowlands with and without treated nets

Geometric means of light trap catches in rooms with untreated nets in highland and lowland villages in the four seasons of the years before and after introduction of alphacypermethrin treated nets into half of the villages. From these data and data on sporozoite (CSP) rates determined by ELISA, entomological inoculation rates per person per year are calculated. Means in the same row with the same superscript do not differ significantly (t test, Kruskall Wallis or χ²); ^jcalculated from mean catch on 4 nights multiplied by 365/4 × 1.5 [8]; the species composition of the anopheline vector population is indicated in terms of the percentage that were An. funestus (Af) and An. marshallii s.l. (Am): the remainder were An. gambiae s.l. [Data in square brackets marked by s;f indicate light trap catches and CSP rates in villages with nets treated respectively with the SC or the Fastac (granular) formulations of alphacypermethrin]

ISSN: 1475-2875