We used tuberculosis genotyping results to derive estimates of prevalence of latent tuberculosis infection in the United States. We estimated <1% prevalence in 1,981 US counties, 1%-<3% in 785 counties, and >3% in 377 counties. This method for estimating prevalence could be applied in any jurisdiction with an established tuberculosis surveillance system.
Keywords: Mycobacterium tuberculosis; United States; bacteria; estimates; infection; latent tuberculosis; molecular epidemiology; prevalence; public health surveillance; respiratory infections; tuberculosis; tuberculosis and other mycobacteria.