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Table 2 Sensitivity for the detection of different bacteria according to specimen transport method and by cycle threshold cut-off value

From: Mailed versus frozen transport of nasal swabs for surveillance of respiratory bacteria in remote Indigenous communities in Australia

  Cycle threshold cut off ≤40 Cycle threshold cut off ≤36
Bacterium   Mailed (Left nare) Frozen (Right nare)   Mailed (Left nare) Frozen (Right nare)
  Episodes +ve Sensitivity% 95% CI Sensitivity% 95% CI Episodes +ve Sensitivity% 95% CI Sensitivity% 95% CI
S. pneumoniae 87 78.2 68.0 – 86.3 97.7 92.0 – 99.7 72 84.7 74.3 – 92.1 93.1 84.5 – 97.7
H. influenzae 87 69.0 58.1 – 78.5 97.7 91.9 – 99.7 66 77.3 65.3 – 86.7 95.5 87.3 – 99.1
S. aureus 29 82.7 64.2 – 94.2 82.7 64.2 – 94.2 17 64.7 38.3 – 85.8 76.5 50.1 – 93.2
MRSA 8 75 34.9 – 96.8 62.5 24.5 – 91.5 3 0 - 100 -
B. pertussis 3 66.7 9.4 – 99.2 33.3 0.8 – 90.6 0 - - - -
M. catarrhalis 77 80.5 69.9 – 88.7 97.4 90.3 – 99.7 63 82.5 70.9 – 90.9 93.7 84.5 – 98.2
Any species 117 82.2% 73.6, 88.1 94.8% 89.4, 98.1 96 85.4 76.7 – 91.7 93.8 86.9 – 97.7