colonization of healthy children by moraxella catarrhalis is characterized by genotype heterogeneity, virulence gene diversity and co-colonization with haemophilus influenzae. | the colonization dynamics of moraxella catarrhalis were studied in a population comprising 1079 healthy children living in rotterdam, the netherlands (the generation r focus cohort). a total of 2751 nasal swabs were obtained during four clinic visits timed to take place at 1.5, 6, 14 and 24 months of age, yielding a total of 709 m. catarrhalis and 621 haemophilus influenzae isolates. between january 2004 and december 2006, approximate but regular 6-monthly cycles of colonization were observed, w ... | 2011 | 20847012 |