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Table 3 Quality of clinical and environmental samples collected

From: Investigation of a community outbreak of typhoid fever associated with drinking water

Samples No. of samples (n) Average total viable count* (CFU/ml or g) Total coliform Count *^ Samples positive for SalmonellaTyphi (%) Samples positive for fecal indicators# (%)
Clinical Samples (feces) 100 - - 22 -
Well water samples 10 3 × 106 - 1 × 107 ≥ 1800 100 100
Household water samples 90 5 × 104 - 4 × 107 ≥ 1800 72 65
Cooked Food samples 50 2 × 103 - 1 × 104 0 2 0
  1. g = gram, CFU = Colony forming unit, * only for environmental samples, ^ was analyzed by MPN method, # fecal indicators include fecal E. coli and Fecal Streptococci.