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DISCOVERY OF AN EXOTIC ASIAN MOSQUITO, OCHLEROTATUS JAPONICUS , IN SOUTHERN INDIANA, USA

DISCOVERY OF AN EXOTIC ASIAN MOSQUITO, OCHLEROTATUS JAPONICUS , IN SOUTHERN INDIANA, USA. FUNDING PROVIDED BY THE CLARK, FLOYD AND HARRISON COUNTY HEALTH DEPARTMENTS. Steven P. Moberly, Indiana University Southeast Brad Foster and Adam Estes, Indiana State Department of Health

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DISCOVERY OF AN EXOTIC ASIAN MOSQUITO, OCHLEROTATUS JAPONICUS , IN SOUTHERN INDIANA, USA

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  1. DISCOVERY OF AN EXOTIC ASIAN MOSQUITO, OCHLEROTATUS JAPONICUS, IN SOUTHERN INDIANA, USA FUNDING PROVIDED BY THE CLARK, FLOYD AND HARRISON COUNTY HEALTH DEPARTMENTS Steven P. Moberly, Indiana University Southeast Brad Foster and Adam Estes, Indiana State Department of Health Douglas J. Bentfield, Clark County, IN Health Department Craig Lalor, Indiana University Southeast

  2. Assist with West Nile Virus Mosquito Monitoring Plan: Collect Each Township on Rotating Basis Collect Hot Spots with Mosquito Problems SERVICE REQUEST TO IUS FROM COUNTY HEALTH DEPARTMENTS

  3. Mobilize Student Work Force and Solicit Help of Faculty and Staff 100+ IUS students and staff in 2004 Faculty and staff provided secure collection locations 21st Century Scholars from Scott County IUS Implementation of Request

  4. Four trap nights at each location Mosquitoes taken to IUS for sorting and identification Sorted mosquitoes were tested at IUS or mailed to state health lab. IUS certified for Biohazard II testing for WNV and Saint Louis Encephalitis Methods

  5. Secure Sampling Location Clark County, Indiana Chancellor’s Horse Farm

  6. Mosquito Traps CDC approved light trap CDC approved gravid mosquito trap

  7. Mosquito Identification Culex mosquito female with blood meal Students received training in mosquito identification

  8. Part of Nationwide Effort to Track WNV State Department of Health Database Center for Disease Control Database WNV Report on IUS Website Positive Mosquito Pools Were Entered into National Databases

  9. On June 10, I encountered an unknown mosquito not found in any available key The mosquito was labeled as unidentified and sent to the State Health Lab for a positive ID Brad Foster and Adam Estes identified the specimen as Oc. japonicus. A new species for Indiana Discovery of Oc. japonicus,Asian rock pool mosquito

  10. Specimens were mailed to Dina Fonseca, Ph.D. in August for genetic fingerprinting The species verification and sequencing results were mailed to us on August 26. The results were surprising and I’ll talk about that later. Positive Genetic Confirmation by Smithsonian Institution

  11. Ochelerotaus japonicusAsian rock pool mosquito

  12. The first specimens were found at three locations in downtown Jeffersonville and in Clark County near water and train transportation centers Research in NY and NJ strongly suggests that Oc. japonicus entered the United States in 1998 as larvae or eggs in used tire shipments. They are quickly moving west. A similar mechanism could have brought them from Ohio to Indiana. However, genetic fingerprinting indicates that our mosquito is unique with a fingerprint like specimens from Hokkaido, Japan. So….how did it arrive here? Continued Surveillance Effort

  13. We’ve found the mosquito at 13 of 80 sampling locations in 2004 Of these, 10 are near the southern Indiana railway system We are now finding the species in more traditional settings--containers like old tires and natural sinkholes in Harrison County Moore and Mitchell, CDC, 1997 indicated positive correlation with early dispersal of Aedes albopictus and interstate transportation system and tire piles near the interstate system (significant at p<0.001). Locations

  14. After I found the initial specimens, the State Health Lab has reported the species from the following counties: Clark, Floyd, Harrison and Washington (our specimens) Crawford, Orange, Marion and St. Joseph STATE HEALTH LAB INFORMATION

  15. Our work will continue next spring.

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