TABLE 7.

Annualized risk estimates for bacteria and protozoa

Site and scenarioRisk estimate (90% prediction interval)
BacteriaProtozoa
Fecal StreptococcusEnterococcusGiardiaaCryptosporidium
Nairn
    Recreator0.53 (0.18-0.85)0.42 (0.12-0.75)0.29 (0.05-0.69)NDb
    Visitor0.1 (0.04-0.19)0.07 (0.02-0.14)0.03 (0-0.08)ND
    Homeless0.72 (0.32-0.97)0.62 (0.24-0.92)0.56 (0.12-0.97)ND
Jackson Street
    Recreator0.53 (0.18-0.85)0.45 (0.13-0.77)0.14 (0-0.42)0.32 (0-0.95)
    Visitor0.1 (0.04-0.19)0.07 (0.02-0.15)0.01 (0-0.04)0.05 (0-0.19)
    Homeless0.72 (0.32-0.97)0.64 (0.25-0.93)0.3 (0-0.79)0.51 (0-1.0)
Saybrook Place
    Recreator0.51 (0.17-0.84)0.43 (0.13-0.76)0.64 (0.19-0.98)ND
    Visitor0.09 (0.03-0.18)0.07 (0.02-0.14)0.1 (0.02-0.23)ND
    Homeless0.7 (0.3-0.96)0.63 (0.24-0.93)0.87 (0.44-1.0)ND
Basking Ridge
    Recreator0.49 (0.1-0.86)0.42 (0.12-0.74)NDND
    Visitor0.06 (0.008-0.14)0.07 (0.02-0.13)NDND
    Homeless0.66 (0.21-0.97)0.62 (0.24-0.92)NDND
  • a Due to relatively small sample size, it was not possible to fully characterize the distribution of Giardia data. Expected values are based on best estimate assuming Poisson distribution.

  • b ND, not detected.