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Bacterial colonization upon treatment with NAC. Mice were treated with 1 μg of B. pertussis LPS coadministered with NAC 2 h before challenge with B. pertussis (107 CFU/40 μl). The lungs of the infected mice were collected for bacterial counts 2 h after the challenge. The results show the average counts for five mice per group. The results are representative of at least four independent experiments. *, P < 0.001 in the Bonferroni test.
