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Table 1 Comparison of the recommended (ECDC) and implemented (ExoSurv) mosquito collection methods at the points of entry (PoE) (Scenario 1) and the areas colonised by invasive mosquito species (IMS) (Scenario 2)

From: Implementation of surveillance of invasive mosquitoes in Belgium according to the ECDC guidelines

A. PoE (Scenario 1)

Type of PoE

Methods and traps

ECDC

ExoSurv2

  

Density traps

Frequency

Density traps

Frequency

Storage sites for imported used tyres Key procedure

BG/MMLP 1

1/5000 m2

2/month

1.3/5000 m2

1/month

LS 1

1/10 tyres

2/year

20 tyres

1/month

OT 1

0

NA*

3.8/5000 m2

1/month

Shelters/greenhouses for imported plants/fruits/vegetables Key procedure

BG/MMLP

1/5000 m2

2/month

0.4/5000 m2

1/month

LS

20 vessels

2/year

20 vessels

2/year†

OT

0

NA

1.1/5000 m2

1/month

Parking lots at country borders Key procedure

BG/MMLP

0

NA

0.2/5000 m2

1/month

LS

10 vessels

2/year

20 vessels

2/year†

OT

1/2500 m2

2/month

0.2/2500 m2

1/month

Ports Key procedure

BG/MMLP

0

NA

0.1/5000 m2

1/month

LS

0

NA

20 vessels

2/year†

OT

1/5000 m2

2/month

0.3/5000 m2

1/month

Airports Optional procedure

BG/MMLP

1/2.5 ha

2/month

0.1/2.5 ha

1/month

LS

0

NA

20 vessels

2/year†

 

OT

1/1 ha

1/month

0.1/1 ha

1/month

B. IMS-colonised areas (Scenario 2)

Surveillance measures

Methods and traps

ECDC

ExoSurv

Density traps

Frequency

Density traps

Frequency

    

Maasmechelen

Natoye

 

Inspection of colonised area Key procedure

BG/MMLP

1/20 ha

2/month

0.1/20 ha

0.3/20 ha

1 or 4/month

LS

40 vessels

2/month

17 vessels

40-60 vessels

1/month

OT

1/5 ha

2/month

0.2/5 ha

0.6/5 ha

1/month

Quality & efficacy of control Key procedure

BG/MMLP

4/site

B&A appl††

0

1/site

1/month

LS

0

NA

0

40-60 vessels

1/month

OT

20/site

B&A appl

0

6/site

1/month

Inspection around colonised area Key procedure

BG/MMLP

0

NA

0

0

NA

LS

0

NA

23 vessels

25-70 vessels

1/month

OT

1/15 ha

1/month

0.09/15 ha

0.08/15 ha

1/month

Quality & efficacy of control Not recommended

BG/MMLP

4/site

B&A appl

0

0

1/month

LS

0

NA

0

20-40 vessels

1/month

 

OT

20/site

B&A appl

0

2/site

1/month

  1. 1BG = BG-Sentinel trap, MMLP = Mosquito Magnet Liberty Plus (CO2-baited) trap, LS = larval sampling, OT = oviposition traps.
  2. 2Period of sampling: July - October 2012; only MMLP traps were used and human landing collection was not performed due to the high workload and the strict time schedule.
  3. *NA = not applicable.
  4. †in August and September 2012.
  5. ††B&A appl = before and after applications.