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Esponse. However, numbers were significantly greater in Marco-/- mice compared to those in Marco+/+ mice at the peak of the response (5 days PI; Fig. 3e, left). Mean numbers of PMNs were also significantly increased in Marco+/+ and Marco-/- mice 1 day PI, but were significantly greater in Marco-/- mice compared to Marco+/+ mice, and remained significantly elevated at 5 days PI (Fig. 3e, right). BA