TABLE 6.

Genotypic diversity of S. pneumoniae in 29 DCCs in Norway

DCC	No. of:				ST(s) with >4 isolates (no. of isolates)	Simpson's index of diversitya
	Children sampled	Children colonized	Isolates	STs
I	31	24	24	9	199 (10)	0.81
II	30	24	25	11	36 (8)	0.88
III	19	15	15	8	176 (6)	0.84
IV	30	23	25	10	62 (5), 199 (6)	0.89
V	30	18	20	10	1978 (8)	0.82
VI	20	13	16	8	439 (5)	0.88
VII	16	14	18	8	941 (10)	0.70
VIII	22	19	22	14		0.96
IX	11	9	9	8		0.97
X	10	9	11	7	179 (5)	0.82
XI	24	15	17	11		0.91
XII	28	22	29	13	162 (9)	0.89
XIII	17	15	17	10	162 (7)	0.84
XIV	18	18	22	8	393 (8)	0.83
XV	9	7	7	7		1.0
XVI	7	7	7	3		0.64
XVII	17	14	18	12		0.92
XVIII	22	22	29	18	2560 (5)	0.96
XIX	22	18	21	8	1046 (6)	0.87
XX	31	22	22	14		0.95
XXI	6	6	6	5		0.86
XXII	30	23	23	11		0.92
XXIII	23	15	16	11		0.95
XXIV	20	19	21	11		0.93
XXV	22	15	19	10	2581 (6)	0.87
XXVI	16	13	16	9		0.88
XXVII	12	8	8	5		0.92
XXVIII	14	12	14	6	9 (5)	0.81
XXIX	16	10	11	7		0.87

^aSimpson's index of diversity (D) = 1 − Σ[n_i(n_i − 1)]/N(N − 1), where n_i is the number of isolates with the ith ST in the population and N is the number of isolates in the population.