Table 1.

Number of samples investigated and percentage of positive colonization in three distinct time periods

Children sampled on	Total samples	Nov 04/Feb 05	May 05/Jun 05	Nov 05/Dec 05
	Positive/Investigated (%)	Positive/Investigated (%)	Positive/Investigated (%)	Positive/Investigated (%)
3 occasions (n = 25)	60/75 (80%)	22/25 (88%)	20/25 (80%)	18/25 (72%)
2 occasions (n = 53)	83/106 (78.3%)	37/44 (84.1%)	39/53 (73.6%)	7/9 (77.8%)
1 occasion (n = 27)	18/27 (66.7%)	2/3 (66.7%)	3/4 (75%)	13/20 (65%)
Total (n = 105)	161/208 (77.4%)	61/72 (84.7%)	62/82 (75.6%)	38/54 (70.4%)