255 medical detachment (fwd) mosquito surveillance plan
DESCRIPTION
255 Medical Detachment (FWD) Mosquito Surveillance Plan. VECTOR BORNE. Outline. Introduction Trap Index Calculation Trigger Points Trap Surveillance Data ULV Application Questions. Introduction. Map reconnaissance Conducted 2 May 03 Identified trap locations Mosquito Trap Deployment - PowerPoint PPT PresentationTRANSCRIPT
255 Medical Detachment (FWD)Mosquito Surveillance Plan
VECTOR BORNE
Outline
• Introduction
• Trap Index Calculation
• Trigger Points
• Trap Surveillance Data
• ULV Application
• Questions
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
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
Trap Index Calculation
# of Mosquitoes trapped
# of Traps x # of nights
Adult FemaleMosquito
Index
=
93
8 x 1=
11.625=
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.
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
1
7
5
6
82
4
3
• Upon arrival at LSAA– Immediate help
– Numerous requests
• Problems identified– No FST
– No FST equipment
– No repellant
– No treated uniforms
– Minimal bed nets
• Education = Problem solving– Proper use of OH
equipment
– NSNs to order equipment
– FST trng class
– Unit level trng
Offered Permethrin bed net treatments
Combined calibration 255th & 792nd MED DETs
IdentificationMosquito species trapped:Ochlerotatus caspiusCulex pipiens complexCuliseta longiareolata
VecTest for Anopheles10 total for the season
Improvised release stations
0
5
10
15
20
25
30
35
40
45
50
5/3/
03
5/5/
03
5/7/
03
5/9/
03
5/11
/03
5/13
/03
5/15
/03
5/17
/03
5/19
/03
5/21
/03
5/23
/03
5/25
/03
5/27
/03
5/29
/03
Date
Tra
p In
dex
Trap Index Mosquito Trap Index Sandfly ULV Treament
Lar
val
0
5
10
15
20
25
30
35
40
456/
1/03
6/3/
03
6/5/
03
6/7/
03
6/9/
03
6/11
/03
6/13
/03
6/15
/03
6/17
/03
6/19
/03
6/21
/03
6/23
/03
6/25
/03
6/27
/03
6/29
/03
Trap Index Mosquito Trap Index Sandfly ULV Treatment
0
20
40
60
80
100
120
140
1607/
1/03
7/3/
03
7/5/
03
7/7/
03
7/9/
03
7/11
/03
7/13
/03
7/15
/03
7/17
/03
7/19
/03
7/21
/03
7/23
/03
7/25
/03
7/27
/03
7/29
/03
Trap Index Mosquito Trap Index Sandfly ULV Treatment
0
20
40
60
80
100
1208/
1/03
8/3/
03
8/5/
03
8/7/
03
8/9/
03
8/11
/03
8/13
/03
8/15
/03
8/17
/03
8/19
/03
8/21
/03
8/23
/03
8/25
/03
8/27
/03
8/29
/03
Trap Index Mosquito Trap Index Sandfly ULV Teatment
Lar
val
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
Questions