Volume 22, Number 2—February 2016
Dispatch
Frequency and Distribution of Rickettsiae, Borreliae, and Ehrlichiae Detected in Human-Parasitizing Ticks, Texas, USA
Elizabeth A. Mitchell, Phillip Williamson, Peggy M. Billingsley, Janel P. Seals, Erin E. Ferguson, and Michael S. Allen
Table 2
Number of positive bacterial DNA sequences identified for each human-parasitizing tick species, Texas, USA, October 1, 2008–September 30, 2014*
| Tick |
No. positive |
||||||||
| Borrelia |
Ehrlichia
chaffeensis |
Rickettsia |
|||||||
| UNID |
burgdorferi |
lonestari |
amblyommii† |
parkeri |
peacockii |
rhipicephali |
buchneri |
||
| Amblyomma americanum | 0 | 0 | 8 | 2 | 179 | 0 | 0 | 0 | 0 |
| A. cajennense | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 0 |
| A. maculatum | 2 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 |
| Dermacentor variabilis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 |
| D. andersoni | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 |
| Ixodes scapularis | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 44 |
| Rhipicephalus sanguineus |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Total |
3 |
1 |
8 |
2 |
189 |
5 |
2 |
4 |
44 |
| *Only tick species originating in Texas that tested positive for Borrelia, Ehrlichia, or Rickettsia spp. by DNA sequence analysis are shown. Additionally, 2 A. maculatum ticks from Texas were positive for Panola Mountain Ehrlichia. UNID, unidentified species. †Candidatus species. | |||||||||
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Page updated: January 15, 2016
Page reviewed: January 15, 2016
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