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Cytokine production by DC exposed to live (LV) or heat-killed (HK) H. ducreyi and LPS singly or in combination after 48 h. Culture supernatants were obtained from DC whose activation levels are reported in Table 1. The levels of IL-6 (A), TNF-α (B), IL-12p70 (C), and IL-10 (D) were assessed by enzyme-linked immunosorbent assay. Data are the means ± SDs of results obtained from six volunteers.
