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Serum survival of CFT073 and a K2 capsule mutant. CFT073 and a deletion mutant lacking K2 capsule (CFT073 Δkps) were adjusted to the same concentration in LB and incubated with 50% NHS or HIS at 37°C for 180 min. Samples were taken at the indicated time points and incubated overnight at 37°C. Viability was assessed by the Miles and Misra method and is presented in CFU/ml.
