Fig 3. Comparison of Pt signal level between 50 ptxP1 and 289 ptxP3 B. pertussis isolates.
Mean normalized signal values were 1.093 (SEM ±0.02286, n = 50) and 1.230 (SEM ±0.009601) for ptxP1 and ptxP3 isolates, respectively (p value < 0.0001).
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