More on the 'skin test is cheaper' meme

From Italy; note that this recently published study deals with those who are at a very high risk of latent TB

Screening for M. tuberculosis infection in immigrants at very high risk of latent infection, high rate even if underreported BCG vaccination and poor health care system access (especially in undocumented or illegal immigrants) could take advantage of the ‘‘ex vivo’’ one shot blood assay reducing the rate of drop-outs, the false positive results and the overload of the health care system for the second level assessment thus exceeding the bias of the higher cost for a single test.