Volume 16, Number 3—March 2010
Research
Borrelia, Ehrlichia, and Rickettsia spp. in Ticks Removed from Persons, Texas, USA
Phillip C. Williamson
, Peggy M. Billingsley, Glenna J. Teltow, Janel P. Seals, Meredith A. Turnbough, and Samuel F. Atkinson
, Peggy M. Billingsley, Glenna J. Teltow, Janel P. Seals, Meredith A. Turnbough, and Samuel F. Atkinson
Table 2
Number and identity of ticks submitted to University of North Texas Health Science Center by the Texas Department of State Health Services Zoonosis Control Program, October 1, 2004, to September 30, 2008*
| Tick | No. positive/no. tested |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Borrelia spp. |
Ehrlichia spp. |
Rickettsia spp. |
Total | ||||||||||
| UNE | PE | E | UNE | PE | E | UNE | PE | E | |||||
| Amblyomma americanum | |||||||||||||
| Adult male | 0/0 | 1/116 | 0/1 | 0/0 | 0/116 | 0/1 | 0/0 | 25/116 | 0/1 | 26/117 | |||
| Adult female | 0/0 | 1/109 | 0/11 | 0/0 | 2/109 | 0/11 | 0/0 | 23/109 | 4/11 | 30/120 | |||
| Nymph | 0/0 | 1/92 | 1/27 | 0/0 | 0/92 | 0/27 | 0/0 | 18/92 | 9/27 | 29/119 | |||
| Larva |
0/0 |
0/11 |
0/0 |
0/0 |
0/11 |
0/0 |
0/0 |
0/11 |
0/0 |
0/11 |
|||
| A. cajennense | |||||||||||||
| Adult male | 0/0 | 0/44 | 0/2 | 0/0 | 1/44 | 0/2 | 0/0 | 0/44 | 0/2 | 1/46 | |||
| Adult female | 0/0 | 1/56 | 0/3 | 0/0 | 0/56 | 0/3 | 0/0 | 0/56 | 0/3 | 1/59 | |||
| Nymph | 0/0 | 0/52 | 0/3 | 0/0 | 0/52 | 0/3 | 0/0 | 3/52 | 1/3 | 4/55 | |||
| Larva |
0/0 |
0/12 |
0/0 |
0/0 |
0/12 |
0/0 |
0/0 |
1/12 |
0/0 |
1/12 |
|||
| A. maculatum | |||||||||||||
| Adult male | 0/0 | 0/7 | 0/0 | 0/0 | 1/7 | 0/0 | 0/0 | 0/7 | 0/0 | 1/7 | |||
| Adult female | 0/0 | 0/1 | 0/1 | 0/0 | 0/1 | 0/1 | 0/0 | 0/1 | 0/1 | 0/2 | |||
| Nymph | 0/0 | 0/1 | 0/0 | 0/0 | 0/1 | 0/0 | 0/0 | 0/1 | 0/1 | 0/1 | |||
| Larva |
0/0 |
0/1 |
0/0 |
0/0 |
0/1 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
|||
| Dermacentor variabilis | |||||||||||||
| Adult male | 0/1 | 0/71 | 0/1 | 0/1 | 0/71 | 0/1 | 0/1 | 4/71 | 0/0 | 4/73 | |||
| Adult female | 0/3 | 1/84 | 0/16 | 0/3 | 0/84 | 0/16 | 0/3 | 6/84 | 1/16 | 8/103 | |||
| Nymph | 0/0 | 0/0 | 0/2 | 0/0 | 0/1 | 0/2 | 0/0 | 0/0 | 0/2 | 0/2 | |||
| Larva |
0/0 |
0/0 |
0/0 |
0/0 |
0/1 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
|||
| Ixodes scapularis | |||||||||||||
| Adult male | 0/0 | 0/4 | 0/0 | 0/0 | 0/4 | 0/0 | 0/0 | 0/4 | 0/0 | 0/4 | |||
| Adult female | 0/0 | 0/41 | 0/22 | 0/0 | 0/41 | 0/22 | 0/0 | 26/41 | 6/22 | 32/63 | |||
| Nymph | 0/0 | 1/8 | 0/1 | 0/0 | 0/8 | 0/1 | 0/0 | 4/8 | 0/1 | 5/9 | |||
| Larva |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
0/0 |
||||
| Rhipicephalus sanguineus | |||||||||||||
| Adult male | 0/0 | 0/23 | 0/0 | 0/0 | 0/23 | 0/0 | 0/0 | 0/23 | 0/0 | 0/23 | |||
| Adult female | 0/2 | 0/35 | 0/6 | 0/2 | 0/35 | 0/6 | 0/2 | 1/35 | 0/6 | 1/43 | |||
| Nymph | 0/0 | 0/5 | 0/15 | 0/0 | 0/5 | 0/15 | 0/0 | 0/5 | 1/15 | 1/20 | |||
| Larva |
0/0 |
0/0 |
0/1 |
0/0 |
0/1 |
0/0 |
0/1 |
0/1 |
|||||
| Total | 0/6 | 6/772 | 1/112 | 0/6 | 4/772 | 0/112 | 0/6 | 111/772 | 22/112 | 144/890 | |||
*Testing by PCR. Only tick species that showed evidence of containing Borrelia, Ehrlichia, or Rickettsia spp. are shown. Seven specimens of Otobius megnini, 2 of Amblyomma inornatum and Dermacentor albipictus, and 1 each of Dermacentor andersonii and Dermacentor nigrolineatus ticks were submitted during the project period. After clarification with the submitter of the D. andersonii specimen, it was concluded that the tick attachment may have occurred in Colorado. UNE, unengorged; PE, partially engorged; E, engorged.
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