TABLE 1.
Proportions of nymphal I. scapularis ticks infected with B. burgdorferi collected by sampling the vegetation at 8 to 10 residential sites in Old Lyme, Lyme, and East Haddam and ERIs, 1989 to 1996
| Yr | % infected (no. tested)a | ERIb
|
|
|---|---|---|---|
| Woods | Lawn | ||
| 1989 | 15.6 (283) | 17.9 | 3.1 |
| 1990 | 13.3 (408) | 11.6 | 2.0 |
| 1991 | 14.6 (903) | 34.5 | 3.3 |
| 1992 | 12.0 (108) | 48.3 | 5.6 |
| 1993 | 8.6 (216) | 18.9 | 1.1 |
| 1994 | 11.6 (560) | 40.0 | 3.3 |
| 1995 | 13.1 (436) | 36.3 | 2.8 |
| 1996 | 24.4 (513) | 76.9 | 4.1 |
| 1997 | 9.8 (439) | 39.9 | 3.6 |
a
Determined by indirect fluorescent antibody staining of tick midgut tissues for B. burgdorferi.
b
Based upon the mean number of nymphs per hectare and the rate of infection by B. burgdorferi.