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Mosquitoes in Neston, Cheshire

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They are also an excellent breeding site for Aedes detritus ... Aedes detritus. Culex pipiens. Culiseta annulata. CDC light- trap. 12 ... Ae detritus. 310. 194 ... – PowerPoint PPT presentation

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Title: Mosquitoes in Neston, Cheshire


1
Mosquitoes in Neston, Cheshire
  • Michael Clarkson, Mike Service and Cathy Glover
  • National Centre for Zoonosis Research, Liverpool
    Veterinary School

2
  • We are grateful to many staff at
  • Leahurst and their families who
  • collected mosquitoes for
  • identification, often involving pain!
  • We thank the following for help
  • and advice
  • Malcolm Bennett
  • Tom Henderson
  • Christian Setzkorn
  • Staff of the Environmental
  • Protection Unit, Ellesmere Port
  • and Neston Borough Council

3
Many complaints of mosquito bites in the Neston
area were received by the Local Authority in 2005
and 2006
Leahurst
River Dee tidal marsh
1 km
4
Dee marshes at Parkgate, Neston looking towards
Wales
These tidal marshes are an internationally
recognised site , being both an SSSI and an EU
Special Area of Conservation
They are also an excellent breeding site for
Aedes detritus
5
Surveys were done in 2007 and 2008 by two methods
traps in gardens and mosquitoes collected by
Leahurst staff recruited from our email list
The Local Authority placed traps in residents
gardens and sixth form students at the local
comprehensive school had traps in their gardens.
Three different types of trap were used
Although the traps were useful for public
relations, the mosquitoes collected by staff were
in better condition, more numerous and more
widely distributed geographically
6
CDC light-trap
BG-Sentinel trap
Midg-it trap
7
Estimate of relative efficiency of traps
Type of Trap Aedes detritus Culex pipiens Culiseta annulata
CDC light- trap 12 61 3
BG trap, no CO2 0 56 5
BG trap with CO2 150 40 5
Midg-it trap 95 28 3
8
(No Transcript)
9
Map showing distribution of 3 species caught
10
Culex pipiens group mosquitoes transmit West Nile
Virus in Europe and USA
Culex pipiens group in United Kingdom consists of
three species which cannot be distinguished
morphologically.
Culex pipiens and Culex torrentium feed only on
birds.
Culex molestus bites mammals including humans and
also occasionally birds.
Molecular methods for differentiating these
species are being developed.
11
A PCR technique described by US workers has been
used to distinguish Cx pipiens group mosquitoes
Mol wt markers
Mol wt markers
Ae detritus
310
194
Cx pipiens
Cx molestus
These studies suggest that our mosquitoes are Cx
pipiens s.s.
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