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Table 1 Infection rates of questing adult I. scapularis, collected in 7 Lower Hudson Valley Counties, NY 2009-2012

From: Isolation of deer tick virus (Powassan virus, lineage II) from Ixodes scapularis and detection of antibody in vertebrate hosts sampled in the Hudson Valley, New York State

County No. ticks (Total Pools) Male/Female No. DTV isolates Male/Female Infection rate (95% CI)a
Dutchess 421/462 (392) 5/4 1.05 (0.52-1.91)
Putnam 302/371 (406) 16/11 3.84 (2.60-5.46)
Westchester 118/84 (21) 0/5 2.73 (1.03-6.04)
Rockland 67/71 (15) 0/2 1.45 (0.27-4.66)
Orange 74/73 (16) 0/0 0.0 (0.00-2.30)
Ulster 46/37 (9) 0/0 0.0 (0.00-3.77)
Sullivan 50/55 (11) 0/0 0.0 (0.00-3.01)
  1. aInfection rate expressed as Maximum Likelihood Estimate/100 ticks. The ranges in parentheses are the 95% confidence intervals representing upper and lower limits.