Intracellular survival of capsulated and non-capsulated variants of the manno(rhamno)biose-containing serotypes K21a, K36, K50 and the capsule-switched derivatives K2(K21a) and K2(K36) in PMNL as compared to the intracellular survival of the capsulated and non-capsulated variants of the K2 and K8 serotypes, whose capsular polysaccharides lack manno(rhamno)biose glycoepitopes. * p < 0.001, vs. all other tested capsulated and non-capsulated serotypes; ** p < 0.001, vs. the capsulated K2 parental strain; *** p < 0.001, vs. the K21a parent.