Table 3 EIR Studies Tied to Indoor Residual Spray Intervention

North-east Tanzania

1995-1996 [25]

[0.03] g lambdacyhalothrin/m²

re-sprayed 7-8 months after initial spray

An. gambiae and An. funestsus

light traps, window exit traps, pyrethrum spray collection and ELISA

Infectious bites/person/night

1995:

Control = 1.04

IRS = 0.98

1996:

Control = 0.773

IRS = 0.057

1995 = 5.7% Reduction

1996 = 93% Reduction

Not reported

Northern Guadalcanal, Solomon Islands

November 1987-June 1988 [26]

[2] g DDT/m²

An. farauti and An. puctulatus

Human landing catch and ELISA

Infectious bites/person/night

Control = 2.204

IRS = 0.9675

56% Reduction

P. falciparum

Control = 29%

IRS = 46%

P. Vivax

Control = 12%

IRS = 9%

P. falciparum =

59% Increase

P. vivax =

25% Reduction

Garki, Nigeria

September 1969-February 1976 [23]

[2] g propoxur/m²

re-sprayed every 2 months

An. Gambiae s.l. and An. funestus

Human landing collection, pyrethrum spray collection, exit trap collection, outdoor resting collection and ELISA

Infectious bites/person/wet season (wet season 1972: May 22-Oct. 22 1973: June 18-Nov. 4)

Control:

Village 1:

1972 = 17 1973 = 21

Village 2:

1972 = 25 1973 = 28

IRS:

Village 3:

1972 = 0 1973 = 10

Village 4:

1972 = 3 1973 = 4

1972 = 93% Reduction

1973 = 71.4%Reduction

P. falciparum

Control

1972 = 43.3%

1973 = 47.5%

IRS

1972 = 36.8% 1973 = 35.0%

P. malariae

Control

1972 = 13.0% 1973 = 11.19%

IRS

1972 = 13.3%

1973 = 13.3%

P. falciparum

1972 =

15% Reduction

1973 =

26% Reduction

P. malariae

1972 = 2.3% Increase

1973 = 19% Increase