Table 2a.

Clustering analysis stratified by lineages and major sub-lineage populations of MTBC.

Lineage	Isolates (n)	Clustered cases (c)	Clustered strains (nc)	Single cases (s)	Total strain types (s + c)	Clustering ratea (%)
Lineage 1	38	3	7	31	34	10.5
Lineage 2	65	8	43	22	30	53.8
Lineage 3	26	2	4	22	24	7.7
Lineage 4	1741	201	982	759	960	44.9
Cameroonb	1046	123	614	432	555	46.9
Ghanab	376	36	206	170	206	45.2
Haarlemb	156	23	91	65	88	43.6
LAMb	50	6	25	25	31	38.0
Ugandab	40	5	16	24	29	27.5
Lineage 5	289	51	143	146	197	31.8
Lineage 6	150	11	48	102	113	24.7
Summaryc	2309	276	1227	1082	1358	41.2

MTBC, Mycobacterium tuberculosis complex.

^aThe clustering rate was used to estimate the recent transmission rate.

^bMajor lineage 4 sub-population.

^cThe summary was calculated using only the items in cells corresponding to the six main lineages.