Table 5– Outcomes of contact investigation studies in congregate settings in high-income countries.

Frist author [ref.]	Country	Location of contact	Contacts tested	Prevalence of active TB %	Prevalence of LTBI %
Gaensbauer [149]	Ireland	Child care centre	268	6.7	NA
Lofy [169]	USA	Homeless facilities	425	3.1	23.3
Marienau [164]	USA	Aeroplane flight	861	0	24
Conover [221]	USA	Methadone clinic	393	NA	22.3
Centers for Disease Control [226]	USA	Clubs with exotic dancers	344	NA	29.8
Davidow [166]	USA	Workplaces	724	0.2	22.0

Data are presented as n, unless otherwise stated. TB: tuberculosis; LTBI: latent tuberculosis infection; NA: not available.