| No. of samples | Mean MOI | |
---|---|---|---|
 | msp-1 | msp-2 | |
Village | |||
 Kedougou | 47 | 2.25 | 2.21 |
 Bandafassi | 72 | 1.73 | 2.06 |
 Ninefesha | 18 | 1.79 | 1.82 |
 Others | 23 | 1.76 | 1.62 |
Age group | |||
  ≤ 15 years | 82 | 2.12 | 2.00 |
  > 15 years | 78 | 1.64 | 1.84 |
Year | |||
 2009 | 61 | 2.21 | 2.50 |
 2010 | 51 | 2.05 | 2.25 |
 2011 | 32 | 1.90 | 1.95 |
 2012 | 9 | 1.65 | 1.70 |
 2013 | 7 | 1.60 | 1.20 |