Abstract
A passive surveillance program monitored ticks submitted by the public in Iowa from 1990–2013. Submitted ticks were identified to species and life stage, and Ixodes scapularis Say nymphs and adults were tested for the presence of Borrelia burgdorferi. An average of 2.6 of Iowa’s 99 counties submitted first reports of I. scapularis per year over the surveillance period, indicating expansion of this tick species across the state. The proportion of vector ticks infected by B. burgdorferi increased over time between 1998 and 2013. In 2013, 23.5% of nymphal and adult I. scapularis were infected with B. burgdorferi, the highest proportion of any year. Active surveillance was performed at selected sites from 2007–2009. Ixodes scapularis nymphs collected at these sites were tested for the presence of B. burgdorferi, Anaplasma phagocytophilum, and spotted fever group Rickettsia spp. (likely representing Rickettsia buchneri). Nymphs tested were 17.3% positive for B. burgdorferi, 28.9% for A. phagocytophilum, and 67.3% for Rickettsia spp. The results of these surveillance programs indicate an increasing risk of disease transmission by I. scapularis in Iowa.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1727-1734 |
| Number of pages | 8 |
| Journal | Journal of medical entomology |
| Volume | 54 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 1 2017 |
Bibliographical note
Funding Information:Iowa State University Professor Emeritus Wayne Rowley founded the passive surveillance program. Partners in this project included the Iowa Department of Public Health and the State Hygienic Laboratory at The University of Iowa. Heathar Adolfs also contributed to this study by managing aspects of the surveillance program between 2011 and 2013. Funding and support for this project were provided by the Iowa Department of Public Health, by the Agriculture and Home Economics Experiment Station (Ames, IA) project 5111, supported by the Hatch Act and State of Iowa funds, and by NSF Grant 0914390 to L.B.
Funding Information:
of Public Health and the State Hygienic Laboratory at The University of Iowa. Heathar Adolfs also contributed to this study by managing aspects of the surveillance program between 2011 and 2013. Funding and support for this project were provided by the Iowa Department of Public Health, by the Agriculture and Home Economics Experiment Station (Ames, IA) project 5111, supported by the Hatch Act and State of Iowa funds, and by NSF Grant 0914390 to L.B.
Publisher Copyright:
© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.
Keywords
- Anaplasma phagocytophilum
- Lyme disease
- Rickettsia buchneri
- Tick
