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Table 2 Colony forming units of S. aureus shed per toddler

From: Shedding of Staphylococcus aureus and methicillin-resistant Staphylococcus aureusfrom adult and pediatric bathers in marine waters

Subject Sand Water Ratio
ID (g) (CFU per person) (CFU per person) (sand/water)
T1 <0.1 N.D. BDL N/A
T2 6.8 500 2.7 × 104 1.8%
T3 9.9 <6 1.1 × 103 0.18%
T4 12.7 <6 1.3 × 103 0.19%
T5 3.9 <6 BDL N/A
T6 24.4 <6 6.3 × 104 0.01%
T7 3.8 <6 BDL N/A
T8 4.4 <6 2.5 × 103 0.08.%
T9 6.5 <6 BDL N/A
T10 8.6 160 2.3 × 104 0.70%
T11 3.7 200 4.5 × 105 0.04%
T12* 5.8 <6 1.4 × 104 0.02%
T13 10.4 <6 2.3 × 103 0.10%
T14 7.6 12 1.4 × 104 0.09%
Average 7.7 69 4.3 × 104 0.32%
Standard Deviation 5.8 145 1.2 × 105 0.09%
  1. * Indicates the study participant colonized with MSSA
  2. N/A = Not applicable. BDL = below detection limit. BDLs were transformed to 1/2 of BDLs in order to estimate averages and standard deviations. The theoretical detection limit (2.8 × 102 CFU/person) can be calculated from the volume of water poured on the toddler (14 L) and the largest membrane filtration volume (50 ml).