A prospective longitudinal study of tuberculosis among household contacts of smear-positive tuberculosis cases in Lima, Peru

Table 2 Past, recent and incident tuberculosis episodes among household contacts, per household

Number of tuberculosis episodes in household contacts	N° households	% households
≥1 past case only	149	12.6
≥1 recent case only	64	5.4
≥1 incident case only	105	8.9
≥1 past + ≥1 recent case	26	2.2
≥1 past + ≥1 incident case	35	3.0
≥1 recent + ≥1 incident case	17	1.4
≥1 past + ≥1 recent + ≥ 1 incident case	6	0.5
No cases	776	65.9
Total	1178	100

Past case = household contact that had a tuberculosis episode more than two years before the diagnosis of the index case. Recent case = household contact that had a tuberculosis episode in the two years previous to the diagnosis of the index case. Incident TB case = TB episode in a household contact after the diagnosis of the index case

ISSN: 1471-2334