Tuberculosis diagnosis by BCG inoculation tuberculin tests can be affected. In general the US approach is likely to result in more false positives and more unnecessary treatment with potentially toxic drugs; the UK approach is as sensitive in theory and should also be more specific, because of the use of interferon-γ tests. Under the US recommendations, diagnosis and treatment of latent tuberculosis infection (LTBI) is considered for any BCG-vaccinated person whose skin test is 10 mm or greater, if any of these circumstances are present: These have been reviewed in detail. In 2007, a systematic review of adenosine deaminase by the NHS
Inoculation loop inferior but less expensive. This loop removes a consistent amount of the liquid suspended inoculum by using the phenomenon of surface tension. The inoculation loop is sterilized (even automatically) with flame (or another heat source) before and after each use. By doing this, the same tool can be reused in different experiments without fear of cross-contamination. After flame sterilization, the loop must be cooled so that the next cells the loop touches are not killed by the hot metal. Inoculation loop An inoculation loop, also called a smear loop, inoculation wand or microstreaker, is a simple tool used mainly by