Table 1. Richness and diversity of bacterial communities in different sample types.

Sample type	Chao (richness) (median ± SD)	Inverse Simpsons (diversity) (median ± SD)
BAL	All: 86.74 ± 41.6	All: 5.66 ± 3.59
	2 days old: 80.27 ± 19.68	2 days old: 5.52 ± 3.92
	3 weeks old: 76.23 ± 11.82	3 weeks old: 2.83 ± 2.96
	30 months old: 97.97 ± 63	30 months old: 7.85 ± 3.44
Buccal swabs	All: 88.63 ± 42.1	All: 4.24 ± 7.03
	2 days old: 73.84 ± 50	2 days old: 2.65 ± 12.71
	3 weeks old: 76.06 ± 17	3 weeks old: 3.63 ± 0.88
	30 months old: 126.81 ± 28	30 months old: 5.93 ± 1.92
Nasal swabs	All: 162.45 ± 73.7	All: 9.33 ± 4.46
	2 days old: 117.1 ± 46.5	2 days old: 6.25 ± 3.21
	3 weeks old: 150.2 ± 19.59	3 weeks old: 8.55 ± 4.20
	30 months old: 267 ± 59.3	30 months old: 10.84 ± 5.68
PBS and DNA extraction reagent controls	All: 80.90 ± 13.72	All: 3.68 ± 2.98