255 Medical Detachment (FWD) Mosquito Surveillance Plan

1. 255 Medical Detachment (FWD)Mosquito Surveillance Plan VECTOR BORNE

2. Outline • Introduction • Trap Index Calculation • Trigger Points • Trap Surveillance Data • ULV Application • Questions

3. Introduction • Map reconnaissance • Conducted 2 May 03 • Identified trap locations • Mosquito Trap Deployment • Initially deployed 5 traps, currently expanded to 8 • Numerous traps stolen • Trap 7 nights a week used Deployed Ops HdBk (LTC Robert) to 4 • Vector Surveillance • Daily identify & count mosquitoes & sandflies in traps • Compute trap index and compare to trigger points • Test Anopheles mosquitoes if trapped for malaria • Prepare sandflies for testing by 520th TAML

4. Introduction • Adult Mosquito Control • ULV application based upon trap index & trigger points • Conducted at 2000 until route completed • 3 control routes on LSA Anaconda • Routes determined by number of mosquitoes trapped along route • Control Evaluation • Control efficacy determined by trap index after spraying • Determines what pesticide to use • To date SCOURGE is the insecticide used • Safe • Effective • Same chemical used in USA for West Nile Virus mosquito control

5. Trap Index Calculation # of Mosquitoes trapped Adult Female Mosquito Index = # of Traps x # of nights 93 = 8 x 1 = 11.625

6. Trigger Points • Trigger Point = Suppression action initiated • Vector Suppression Trigger Point = Trap Index of 1 mosquito • If 1 Anopheles mosquito is trapped, suppression action is initiated • Anopheles mosquitoes are the only (VECTORS) carriers of malaria • Nuisance Suppression Trigger Point = Trap Index of 5 mosquitoes • If 5 of any other type of mosquito is trapped, control action is initiated. • Nuisance mosquitoes do not vector disease, but do bite.

7. ULV Application • Triggered by Trap Index • Applies insecticide in a “fog” of very small particles (8-30 microns) • Particles float in the air, sunset to sun rise. • Mosquitoes fly into fog & die. • Weather conditions can preclude spray ops • too windy or rain Home station PMCS/Trng

8. 3 4 1 8 2 6 5 7

9. Upon arrival at LSAA • Immediate help • Numerous requests • Problems identified • No FST • No FST equipment • No repellant • No treated uniforms • Minimal bed nets

10. Education = Problem solving • Proper use of OH equipment • NSNs to order equipment • FST trng class • Unit level trng

11. Offered Permethrin bed net treatments

15. Combined calibration 255th & 792nd MED DETs

16. Identification Mosquito species trapped: Ochlerotatus caspius Culex  pipiens complex Culiseta longiareolata VecTest for Anopheles 10 total for the season

17. Improvised release stations

19. Larval

22. Larval

23. AAR • CON • Larval treatments work? • Didn’t look at age of mosquitoes • Different soldiers conducted dips • Water level greatly reduced on post • Better at identifying mosquitoes thru resources • No regional keys on hand • Harbach (1985) only key • PROS • When we left everyone begged us to come back • Used 4 out of 6 pieces of entomology equipment on MTOE • Real world missions

25. Questions Vector Borne!