Figure 2.

Spot distribution among positive IGRA. *During the study period we followed the actual Swiss Guidelines and the cases with 6–9 spots were counted as positive. The recent CDC recommendations differ and propose to consider tests results between 6 and 9 spots as borderline.

Sarivalasis et al. BMC Infectious Diseases 2012 12:285   doi:10.1186/1471-2334-12-285
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