Volume 20, Number 2—February 2014
Research
Monitoring Human Babesiosis Emergence through Vector Surveillance New England, USA
Table 1
Summary of nymphal Ixodes scapularis infection with Babesia microti, Borrelia burgdorferi ,and both, Nantucket Island, Massachusetts, and Connecticut, 2007 and 2010
Region |
Year became disease endemic |
Year tick sample collected |
B. burgdorferi infection prevalence (no. positive/no. tested) |
B. microti infection prevalence (no. positive/no. tested) |
Tick ratio* |
Co-infection prevalence
(no. positive/no. tested) |
---|---|---|---|---|---|---|
Nantucket, MA | 1969 | 2010 | 0.21 (18/87) | 0.09 (8/87) | 2.33 | 0.01 (1/87) |
Southeastern CT | ||||||
Lyme | 1996 | 2007 | 0.13 (23/182) | 0.15 (28/182) | 0.82 | 0.04 (8/182) |
Old Lyme | 1992 | 2007 | 0.20 (13/65) | 0.20 (13/65) | 1.00 | 0.06 (4/65) |
Combined sites |
0.15 (36/247) |
0.17 (41/247) |
0.88 |
0.05 (12/247) |
||
Northeastern CT | ||||||
Hampton | 2007 | 2010 | 0.29(43/147) | 0.10 14/147) | 2.90 | 0.05 (8/147) |
South Mansfield | 2002 | 2010 | 0.11 (12/111) | 0.09 (10/111) | 1.22 | 0.01 (1/111) |
North Mansfield | 2002 | 2010 | 0.13 (18/139) | 0.01 (1/138) | 13.00 | 0.00 (0/138) |
Willington | Not endemic | 2010 | 0.36 (51/142) | 0.03 (4/142) | 12.00 | 0.02 (3/142) |
Eastford | Not endemic | 2007 | 0.31 (93/298) | 0.03 (10/298) | 10.33 | 0.03 (10/298) |
Combined sites | 0.26 (217/836) | 0.05 (39/836) | 5.20 | 0.03 (24/828) |
*Ratio of I. scapularis ticks infected with B. burgdorferi and that of ticks infected with B. microti.