Impact of the koka reservoir on malaria, Solomon Kibret, Matthew McCartney and Jonathan Lautze. Challenge Program on Water and Food, 2nd International Forum on Water and Food, Addis Ababa, Ethiopia November 2008

1. Solomon Kibret, Matthew McCartney and Jonathan Lautze Impact of the Koka Reservoir on Malaria Challenge Program on Water and Food, 2nd International Forum on Water and Food, Addis Ababa, Ethiopia November 2008 Cover slide photo credit: Solomon Kibret (Koka reservoir), Jonathan Lautze

4. The study area Source: Kibret, S.; McCartney, Matthew; Lautze, Jonathan; Jayasinghe, G. 2009. Malaria transmission in the vicinity of impounded water: evidence from the Koka Reservoir, Ethiopia. Colombo, Sri Lanka: International Water Management Institute (IWMI). 39p. (IWMI Research Report 132)

5. Climate Malaria is seasonally demarcated, with peak transmission following the long wet season, generally lasting from mid-September to mid-November. Source: Created by S.Kibret using IWMI data, 2008

8. Photo Credit: Jonathan Lautze Photo Credit: Jonathan Lautze Photo Credit: Jonathan Lautze

9. Malaria cases passively reported in terms of proximity to the Koka Reservoir. Results Impact of the reservoir on malaria incidence Source: Preliminary figures compiled for Research report 132, S.Kibret 29.6-40.2 34.9 6-9 46.8-63.6 55.2 3-6 69.6-92.2 80.9 0-3 95% CI Annual cases per 1000 persons Distance from reservoir (km)

13. Results…... Seasonal Anopheles larval density in the reservoir and control villages. Source: Preliminary figures created for Research Report 132, S. Kibret

14. Results…... Summary of adult Anopheles mosquitoes collected August 2006 and December 2007. Source: Kibret, S.; McCartney, Matthew; Lautze, Jonathan; Jayasinghe, G. 2009. Malaria transmission in the vicinity of impounded water: evidence from the Koka Reservoir, Ethiopia. Colombo, Sri Lanka: International Water Management Institute (IWMI). 39p. (IWMI Research Report 132) 438 0 (0.0) 68 (15.5) 92 (21.0) 278 (63.5) Control Villages 2514 29 (1.2) 342 (13.6) 787 (31.3) 1356 (53.9) Reservoir Villages Total An. funestus An. coustani An. pharoensis An. arabiensis

15. Results…... Density of An . arabiensis and An . pharoensis between August 2006 and December 2007 Source: Preliminary figures created for Research Report 132, S. Kibret

16. Results…... Bloodmeal sources of Anopheles mosquitoes, Aug 2006–Dec 2007 Source: Kibret, S.; McCartney, Matthew; Lautze, Jonathan; Jayasinghe, G. 2009. Malaria transmission in the vicinity of impounded water: evidence from the Koka Reservoir, Ethiopia. Colombo, Sri Lanka: International Water Management Institute (IWMI). 39p. (IWMI Research Report 132) 319 238 (74.6) 69 (21.6) 31 (9.7) 385 240 (62.3) 111 (28.8) 72 (18.7) 103 44 (42.7) 63 (61.2) 16 (15.5) 8 2 (25.0) 4 (50.0) 3 (37.5) 136 85 (62.5) 41 (30.1) 29 (21.3) 45 26 (57.8) 15 (33.3) 8 (17.8) 23 5 (21.7) 13 (56.5) 6 (26.1) 0 0 0 0 Reservoir An. arabiensis An. pharoensis An. coustani An. funestus Control An. arabiensis An. pharoensis An. coustani An. funestus No. tested No. positive No. positive Unidentified for HB for BB Village Species

17. Results…... Plasmodium falciparum sporozoite rates between August 2006 and December 2007 Source: Kibret, S.; McCartney, Matthew; Lautze, Jonathan; Jayasinghe, G. 2009. Malaria transmission in the vicinity of impounded water: evidence from the Koka Reservoir, Ethiopia. Colombo, Sri Lanka: International Water Management Institute (IWMI). 39p. (IWMI Research Report 132) 824 0.97 574 0.70 252 0.00 20 0.00 532 1.32 213 0.47 90 0.00 9 0.00 161 0.00 42 0.00 45 0.00 0 0 117 0.00 50 0.00 23 0.00 0 0 Ejersa Siree-Robe Gudedo Kuma An. arabiensis An. pharoensis An. coustani An. funestus no. tested positive (%) no. tested positive (%) no. tested positive (%) no. tested positive(%) Village