Fig. 1

Cytokine and chemokine levels from epithelial cells exposed to N. meningitidis of invasive (gray) and carriage (white) isolates of serogroups B (invasive n = 2, carriage n = 1), C (invasive n = 3, carriage n = 2), W (invasive n = 7, carriage n = 3) and Y (invasive n = 2, carriage n = 2). Box plots represent the median, 1st and 3rd quartiles and min/max from 6 experiments for each isolate. Differences between serogroups were calculated using one-way ANOVA using Kruskal‒Wallis testing and Dunn’s multiple comparison corrections, and differences between invasive and carriage isolates within each serogroup were calculated using a Mann‒Whitney test