Fig. 7: Murine colonisation density for MT93 and MT23 (serotype 23B) and MT120 and MT28 (serotype 38).

CFUs recovered from nasopharyngeal washes of CD1 outbred mice inoculated intranasally singly with serotype 23B MT93 or MT23 (a), singly with serotype 38 MT120 or MT28 (b). In c CFUs from a competition experiment with a 1:1 ratio of serotype 38 MT120 and MT28, seven days post inoculation, are transformed into the competitive index. Six mice were used for each condition. All p-values derived using Wilcoxon ranked-sum test: a p-value = 0.7. b MTs 120 and 28 p-value = 0.06; c MTs 93 and 23 p-value < 0.001. All p-values reported are for two-sided statistical tests.