Volume 12, Number 4—April 2006
Research
Epidemic Spread of Lyme Borreliosis, Northeastern United States
Table 3
Borrelia burgdorferi infections and frequency distributions of genotypes in ticks*
| Host species | No. of infected/tested ticks (%) | No. of ticks infected with different genotypes (%)† |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| GT1 | GT2 | GT3 | GT4 | GT5 | GT6 | GT7 | GT8 | ND | ||
| White-footed mouse | 90/100 (90.0) | 11 (11.0) | 31 (31.0) | 26 (26.0) | 4 (4.0) | 10 (10.0) | 2 (2.0) | 1 (1.0) | 4 (4.0) | 11 (11.0) |
| Pine vole | 29/113 (25.7) | 13 (11.5) | 7 (6.2) | 1 (0.9) | 2 (1.8) | 1 (0.9) | 1 (0.9) | 5 (4.4) | ||
| Eastern chipmunk | 17/73 (23.3) | 1 (1.4) | 4 (5.5) | 12(16.4) | ||||||
| Gray squirrel | 19/60 (31.7) | 16 (26.7) | 7 (11.7) | |||||||
| Raccoon | 38/500 (7.6) | 5 (1.0) | 5 (1.0) | 15 (3.0) | 8 (1.6) | 5 (1.0) | ||||
| Virginia opossum | 27/271 (10.0) | 1 (0.4) | 13 (4.8) | 3 (1.1) | 1 (0.4) | 5 (1.8) | ||||
| Subtotal | 220/1,117 (19.7) | 30 (2.7) | 44 (3.9) | 40 (3.6) | 25 (2.2) | 31 (2.8) | 2 (0.2) | 10 (0.9) | 23 (2.1) | 25 (2.2) |
| Field-collected nymphs | 69/178 (38.8) | 8 (4.5) | 33 (18.5) | 17 (9.6) | 6 (3.4) | 5 (2.8) | 2 (1.1) | 1 (0.6) | 3 (1.7) | |
*GT, genotype; ND, not determined.
†In some cases, the sum of genotype infections was greater than the number of infected ticks because of mixed infections (data not shown).
1Current affiliation, New York Medical College, Valhalla, New York, USA
2Current affiliation, University of Bath, Bath, United Kingdom
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