Table 2.
EIR Studies Tied to Insecticide Treated Bed Net Intervention
| Location/Year Study Done/Reference | Insecticide | Mosquito | Method | EIR | Parasite Rate |
|---|---|---|---|---|---|
| Tanzania: highland hamlets (altitudes 784 - 1148 m) and lowland hamlets (199-300 m) October 1998-August 2000 [20] |
[0.02] g alphacypermethrin/m2 nets not re-treated during study |
An. gambiae s.l., An. funestus and An.marshallii s.l. | light traps, pyrethrum spray, window exit traps and ELISA | Infectious bites/person/year Highland: Control = 10.4 ITN = 3.2 Lowland: Control = 148.6 ITN = 37.5 Highland = 69% Reduction Lowland = 75% Reduction |
Highlands: 6 months-2 years: Control = 54.1% ITN = 31.4% 2-5 years: Control = 73% ITN = 44.3% 6-12 years: Control = 67.7% ITN = 49.4% Lowlands: 6 months-2 years: Control = 82.9% ITN = 63.1% 2-5 years: Control = 88.8% ITN = 78.3% 6-12 years: Control = 83.3% ITN = 80.6% Highlands = 36% Reduction Lowlands = 13% Reduction |
| Lake Victoria shore in Western Kenya January 1997-February 2000 [19] |
[0.5] g permethrin/m2 nets re-treated every 6-11 months |
An. gambiae and An. funestus | pyrethrum spray sheet collection and ELISA | Infectious bite/person/month Control = 0.93 ITN = 0.08 91% Reduction |
Not reported |
| North East Tanzania 1997-1998 [21] |
[0.02] g alphacypermethrin/m2 or [0.1] g lambdacyhalothrin/m2 | An. gambiae s.l., An. funestus, An. marshallii and cx. quinquefasciatus | light traps and ELISA | Infectious bites/person/night Control = 3.24 alphacypermethrin = 0.153 lambdacyhalothrin = 0.140 alphacypermethrin = 95% Reduction lambdacyhalothrin = 97% Reduction |
Rates of re-infection with asexual malaria parasites after treatment with chlorproguanil-dapsone: Control = 30.8% alphacypermethrin = 8.0% lambdacyhalothrin = 7.5% alphacypermethrin = 74% Reduction lambdacyhalothrin = 76% Reduction |
| North-east Tanzania 1995-1996 [25] |
[0.01] g lambdacyhalothrin/m2 for two villages [0.02] g lambdacyhalothrin/m2 for two villages nets re-treated after 7 months |
An. gambiae and An. Funestsus | light traps, window exit traps, pyrethrum spray collection and ELISA | Infectious bites/person/night 1995: Control = 1.04 ITN = 1.48 1996: Control = 0.773 ITN = 0.08 1995 = 42% Increase 1996 = 90%Reduction |
Not reported |
| Western Kenya March-June 1990 and 1991 (high transmission season) [22] |
[0.5] g permethrin/m2 nets re-treated October 1990 |
An. Gambiae s.s. | night biting collections and ELISA | Infectious bites/person/night 1990 high transmission season: Control = 0.47 ITN = 0.21 1991 high transmission season: Control = 0.36 ITN = 0.09 1990 = 55% Reduction 1991 = 75% Reduction |
Incidence of Plasmodium falciparum parasitemia ≥ 2,500/mm2 in children less than six years old 1990 high transmission season: Control = 135 (94) ITN = 77 (53) 1991 high transmission season: Control = 64(82) ITN = 51(64) 1990 = 43% Reduction 1991 = 20% Reduction |
| Northern Guadalcanal, Solomon Islands November 1987-June 1988 [26] |
[0.5] g permethrin/m2 nets re-treated August 1987 |
An. farauti and An. Puctulatus | Human landing catch and ELISA | Infectious bites/person/night Control = 2.204 ITN = 0.129 94% Reduction |
P. falciparum Control = 29% ITN = 21% P. vivax Control = 12% ITN = 14% P. falciparum = 28% Reduction P. vivax = 17% Increase |